drivers/net/wireless/ath/ath10k/htt_rx.c

   1 /*
   2  * Copyright (c) 2005-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "core.h"
  19 #include "htc.h"
  20 #include "htt.h"
  21 #include "txrx.h"
  22 #include "debug.h"
  23 #include "trace.h"
  24 #include "mac.h"
  25
  26 #include <linux/log2.h>
  27
  28 #define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
  29 #define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
  30
  31 /* when under memory pressure rx ring refill may fail and needs a retry */
  32 #define HTT_RX_RING_REFILL_RETRY_MS 50
  33
  34 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
  35 static void ath10k_htt_txrx_compl_task(unsigned long ptr);
  36
  37 static struct sk_buff *
  38 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 paddr)
  39 {
  40         struct ath10k_skb_rxcb *rxcb;
  41
  42         hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
  43                 if (rxcb->paddr == paddr)
  44                         return ATH10K_RXCB_SKB(rxcb);
  45
  46         WARN_ON_ONCE(1);
  47         return NULL;
  48 }
  49
  50 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
  51 {
  52         struct sk_buff *skb;
  53         struct ath10k_skb_rxcb *rxcb;
  54         struct hlist_node *n;
  55         int i;
  56
  57         if (htt->rx_ring.in_ord_rx) {
  58                 hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
  59                         skb = ATH10K_RXCB_SKB(rxcb);
  60                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  61                                          skb->len + skb_tailroom(skb),
  62                                          DMA_FROM_DEVICE);
  63                         hash_del(&rxcb->hlist);
  64                         dev_kfree_skb_any(skb);
  65                 }
  66         } else {
  67                 for (i = 0; i < htt->rx_ring.size; i++) {
  68                         skb = htt->rx_ring.netbufs_ring[i];
  69                         if (!skb)
  70                                 continue;
  71
  72                         rxcb = ATH10K_SKB_RXCB(skb);
  73                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  74                                          skb->len + skb_tailroom(skb),
  75                                          DMA_FROM_DEVICE);
  76                         dev_kfree_skb_any(skb);
  77                 }
  78         }
  79
  80         htt->rx_ring.fill_cnt = 0;
  81         hash_init(htt->rx_ring.skb_table);
  82         memset(htt->rx_ring.netbufs_ring, 0,
  83                htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
  84 }
  85
  86 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
  87 {
  88         struct htt_rx_desc *rx_desc;
  89         struct ath10k_skb_rxcb *rxcb;
  90         struct sk_buff *skb;
  91         dma_addr_t paddr;
  92         int ret = 0, idx;
  93
  94         /* The Full Rx Reorder firmware has no way of telling the host
  95          * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
  96          * To keep things simple make sure ring is always half empty. This
  97          * guarantees there'll be no replenishment overruns possible.
  98          */
  99         BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
 100
 101         idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
 102
 103         if (idx < 0 || idx >= htt->rx_ring.size) {
 104                 ath10k_err(htt->ar, "rx ring index is not valid, firmware malfunctioning?\n");
 105                 idx &= htt->rx_ring.size_mask;
 106                 ret = -ENOMEM;
 107                 goto fail;
 108         }
 109
 110         while (num > 0) {
 111                 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
 112                 if (!skb) {
 113                         ret = -ENOMEM;
 114                         goto fail;
 115                 }
 116
 117                 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
 118                         skb_pull(skb,
 119                                  PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
 120                                  skb->data);
 121
 122                 /* Clear rx_desc attention word before posting to Rx ring */
 123                 rx_desc = (struct htt_rx_desc *)skb->data;
 124                 rx_desc->attention.flags = __cpu_to_le32(0);
 125
 126                 paddr = dma_map_single(htt->ar->dev, skb->data,
 127                                        skb->len + skb_tailroom(skb),
 128                                        DMA_FROM_DEVICE);
 129
 130                 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
 131                         dev_kfree_skb_any(skb);
 132                         ret = -ENOMEM;
 133                         goto fail;
 134                 }
 135
 136                 rxcb = ATH10K_SKB_RXCB(skb);
 137                 rxcb->paddr = paddr;
 138                 htt->rx_ring.netbufs_ring[idx] = skb;
 139                 htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
 140                 htt->rx_ring.fill_cnt++;
 141
 142                 if (htt->rx_ring.in_ord_rx) {
 143                         hash_add(htt->rx_ring.skb_table,
 144                                  &ATH10K_SKB_RXCB(skb)->hlist,
 145                                  (u32)paddr);
 146                 }
 147
 148                 num--;
 149                 idx++;
 150                 idx &= htt->rx_ring.size_mask;
 151         }
 152
 153 fail:
 154         /*
 155          * Make sure the rx buffer is updated before available buffer
 156          * index to avoid any potential rx ring corruption.
 157          */
 158         mb();
 159         *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
 160         return ret;
 161 }
 162
 163 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 164 {
 165         lockdep_assert_held(&htt->rx_ring.lock);
 166         return __ath10k_htt_rx_ring_fill_n(htt, num);
 167 }
 168
 169 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
 170 {
 171         int ret, num_deficit, num_to_fill;
 172
 173         /* Refilling the whole RX ring buffer proves to be a bad idea. The
 174          * reason is RX may take up significant amount of CPU cycles and starve
 175          * other tasks, e.g. TX on an ethernet device while acting as a bridge
 176          * with ath10k wlan interface. This ended up with very poor performance
 177          * once CPU the host system was overwhelmed with RX on ath10k.
 178          *
 179          * By limiting the number of refills the replenishing occurs
 180          * progressively. This in turns makes use of the fact tasklets are
 181          * processed in FIFO order. This means actual RX processing can starve
 182          * out refilling. If there's not enough buffers on RX ring FW will not
 183          * report RX until it is refilled with enough buffers. This
 184          * automatically balances load wrt to CPU power.
 185          *
 186          * This probably comes at a cost of lower maximum throughput but
 187          * improves the average and stability. */
 188         spin_lock_bh(&htt->rx_ring.lock);
 189         num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
 190         num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
 191         num_deficit -= num_to_fill;
 192         ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
 193         if (ret == -ENOMEM) {
 194                 /*
 195                  * Failed to fill it to the desired level -
 196                  * we'll start a timer and try again next time.
 197                  * As long as enough buffers are left in the ring for
 198                  * another A-MPDU rx, no special recovery is needed.
 199                  */
 200                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 201                           msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
 202         } else if (num_deficit > 0) {
 203                 tasklet_schedule(&htt->rx_replenish_task);
 204         }
 205         spin_unlock_bh(&htt->rx_ring.lock);
 206 }
 207
 208 static void ath10k_htt_rx_ring_refill_retry(unsigned long arg)
 209 {
 210         struct ath10k_htt *htt = (struct ath10k_htt *)arg;
 211
 212         ath10k_htt_rx_msdu_buff_replenish(htt);
 213 }
 214
 215 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
 216 {
 217         struct ath10k_htt *htt = &ar->htt;
 218         int ret;
 219
 220         spin_lock_bh(&htt->rx_ring.lock);
 221         ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
 222                                               htt->rx_ring.fill_cnt));
 223
 224         if (ret)
 225                 ath10k_htt_rx_ring_free(htt);
 226
 227         spin_unlock_bh(&htt->rx_ring.lock);
 228
 229         return ret;
 230 }
 231
 232 void ath10k_htt_rx_free(struct ath10k_htt *htt)
 233 {
 234         del_timer_sync(&htt->rx_ring.refill_retry_timer);
 235         tasklet_kill(&htt->rx_replenish_task);
 236         tasklet_kill(&htt->txrx_compl_task);
 237
 238         skb_queue_purge(&htt->tx_compl_q);
 239         skb_queue_purge(&htt->rx_compl_q);
 240         skb_queue_purge(&htt->rx_in_ord_compl_q);
 241
 242         spin_lock_bh(&htt->rx_ring.lock);
 243         ath10k_htt_rx_ring_free(htt);
 244         spin_unlock_bh(&htt->rx_ring.lock);
 245
 246         dma_free_coherent(htt->ar->dev,
 247                           (htt->rx_ring.size *
 248                            sizeof(htt->rx_ring.paddrs_ring)),
 249                           htt->rx_ring.paddrs_ring,
 250                           htt->rx_ring.base_paddr);
 251
 252         dma_free_coherent(htt->ar->dev,
 253                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 254                           htt->rx_ring.alloc_idx.vaddr,
 255                           htt->rx_ring.alloc_idx.paddr);
 256
 257         kfree(htt->rx_ring.netbufs_ring);
 258 }
 259
 260 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 261 {
 262         struct ath10k *ar = htt->ar;
 263         int idx;
 264         struct sk_buff *msdu;
 265
 266         lockdep_assert_held(&htt->rx_ring.lock);
 267
 268         if (htt->rx_ring.fill_cnt == 0) {
 269                 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
 270                 return NULL;
 271         }
 272
 273         idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 274         msdu = htt->rx_ring.netbufs_ring[idx];
 275         htt->rx_ring.netbufs_ring[idx] = NULL;
 276         htt->rx_ring.paddrs_ring[idx] = 0;
 277
 278         idx++;
 279         idx &= htt->rx_ring.size_mask;
 280         htt->rx_ring.sw_rd_idx.msdu_payld = idx;
 281         htt->rx_ring.fill_cnt--;
 282
 283         dma_unmap_single(htt->ar->dev,
 284                          ATH10K_SKB_RXCB(msdu)->paddr,
 285                          msdu->len + skb_tailroom(msdu),
 286                          DMA_FROM_DEVICE);
 287         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 288                         msdu->data, msdu->len + skb_tailroom(msdu));
 289
 290         return msdu;
 291 }
 292
 293 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 294 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 295                                    u8 **fw_desc, int *fw_desc_len,
 296                                    struct sk_buff_head *amsdu)
 297 {
 298         struct ath10k *ar = htt->ar;
 299         int msdu_len, msdu_chaining = 0;
 300         struct sk_buff *msdu;
 301         struct htt_rx_desc *rx_desc;
 302
 303         lockdep_assert_held(&htt->rx_ring.lock);
 304
 305         for (;;) {
 306                 int last_msdu, msdu_len_invalid, msdu_chained;
 307
 308                 msdu = ath10k_htt_rx_netbuf_pop(htt);
 309                 if (!msdu) {
 310                         __skb_queue_purge(amsdu);
 311                         return -ENOENT;
 312                 }
 313
 314                 __skb_queue_tail(amsdu, msdu);
 315
 316                 rx_desc = (struct htt_rx_desc *)msdu->data;
 317
 318                 /* FIXME: we must report msdu payload since this is what caller
 319                  *        expects now */
 320                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 321                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 322
 323                 /*
 324                  * Sanity check - confirm the HW is finished filling in the
 325                  * rx data.
 326                  * If the HW and SW are working correctly, then it's guaranteed
 327                  * that the HW's MAC DMA is done before this point in the SW.
 328                  * To prevent the case that we handle a stale Rx descriptor,
 329                  * just assert for now until we have a way to recover.
 330                  */
 331                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 332                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 333                         __skb_queue_purge(amsdu);
 334                         return -EIO;
 335                 }
 336
 337                 /*
 338                  * Copy the FW rx descriptor for this MSDU from the rx
 339                  * indication message into the MSDU's netbuf. HL uses the
 340                  * same rx indication message definition as LL, and simply
 341                  * appends new info (fields from the HW rx desc, and the
 342                  * MSDU payload itself). So, the offset into the rx
 343                  * indication message only has to account for the standard
 344                  * offset of the per-MSDU FW rx desc info within the
 345                  * message, and how many bytes of the per-MSDU FW rx desc
 346                  * info have already been consumed. (And the endianness of
 347                  * the host, since for a big-endian host, the rx ind
 348                  * message contents, including the per-MSDU rx desc bytes,
 349                  * were byteswapped during upload.)
 350                  */
 351                 if (*fw_desc_len > 0) {
 352                         rx_desc->fw_desc.info0 = **fw_desc;
 353                         /*
 354                          * The target is expected to only provide the basic
 355                          * per-MSDU rx descriptors. Just to be sure, verify
 356                          * that the target has not attached extension data
 357                          * (e.g. LRO flow ID).
 358                          */
 359
 360                         /* or more, if there's extension data */
 361                         (*fw_desc)++;
 362                         (*fw_desc_len)--;
 363                 } else {
 364                         /*
 365                          * When an oversized AMSDU happened, FW will lost
 366                          * some of MSDU status - in this case, the FW
 367                          * descriptors provided will be less than the
 368                          * actual MSDUs inside this MPDU. Mark the FW
 369                          * descriptors so that it will still deliver to
 370                          * upper stack, if no CRC error for this MPDU.
 371                          *
 372                          * FIX THIS - the FW descriptors are actually for
 373                          * MSDUs in the end of this A-MSDU instead of the
 374                          * beginning.
 375                          */
 376                         rx_desc->fw_desc.info0 = 0;
 377                 }
 378
 379                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 380                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 381                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 382                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
 383                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 384                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 385
 386                 if (msdu_len_invalid)
 387                         msdu_len = 0;
 388
 389                 skb_trim(msdu, 0);
 390                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 391                 msdu_len -= msdu->len;
 392
 393                 /* Note: Chained buffers do not contain rx descriptor */
 394                 while (msdu_chained--) {
 395                         msdu = ath10k_htt_rx_netbuf_pop(htt);
 396                         if (!msdu) {
 397                                 __skb_queue_purge(amsdu);
 398                                 return -ENOENT;
 399                         }
 400
 401                         __skb_queue_tail(amsdu, msdu);
 402                         skb_trim(msdu, 0);
 403                         skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
 404                         msdu_len -= msdu->len;
 405                         msdu_chaining = 1;
 406                 }
 407
 408                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
 409                                 RX_MSDU_END_INFO0_LAST_MSDU;
 410
 411                 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
 412                                          sizeof(*rx_desc) - sizeof(u32));
 413
 414                 if (last_msdu)
 415                         break;
 416         }
 417
 418         if (skb_queue_empty(amsdu))
 419                 msdu_chaining = -1;
 420
 421         /*
 422          * Don't refill the ring yet.
 423          *
 424          * First, the elements popped here are still in use - it is not
 425          * safe to overwrite them until the matching call to
 426          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 427          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 428          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 429          * (something like 3 buffers). Consequently, we'll rely on the txrx
 430          * SW to tell us when it is done pulling all the PPDU's rx buffers
 431          * out of the rx ring, and then refill it just once.
 432          */
 433
 434         return msdu_chaining;
 435 }
 436
 437 static void ath10k_htt_rx_replenish_task(unsigned long ptr)
 438 {
 439         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
 440
 441         ath10k_htt_rx_msdu_buff_replenish(htt);
 442 }
 443
 444 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
 445                                                u32 paddr)
 446 {
 447         struct ath10k *ar = htt->ar;
 448         struct ath10k_skb_rxcb *rxcb;
 449         struct sk_buff *msdu;
 450
 451         lockdep_assert_held(&htt->rx_ring.lock);
 452
 453         msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
 454         if (!msdu)
 455                 return NULL;
 456
 457         rxcb = ATH10K_SKB_RXCB(msdu);
 458         hash_del(&rxcb->hlist);
 459         htt->rx_ring.fill_cnt--;
 460
 461         dma_unmap_single(htt->ar->dev, rxcb->paddr,
 462                          msdu->len + skb_tailroom(msdu),
 463                          DMA_FROM_DEVICE);
 464         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 465                         msdu->data, msdu->len + skb_tailroom(msdu));
 466
 467         return msdu;
 468 }
 469
 470 static int ath10k_htt_rx_pop_paddr_list(struct ath10k_htt *htt,
 471                                         struct htt_rx_in_ord_ind *ev,
 472                                         struct sk_buff_head *list)
 473 {
 474         struct ath10k *ar = htt->ar;
 475         struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs;
 476         struct htt_rx_desc *rxd;
 477         struct sk_buff *msdu;
 478         int msdu_count;
 479         bool is_offload;
 480         u32 paddr;
 481
 482         lockdep_assert_held(&htt->rx_ring.lock);
 483
 484         msdu_count = __le16_to_cpu(ev->msdu_count);
 485         is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
 486
 487         while (msdu_count--) {
 488                 paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
 489
 490                 msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
 491                 if (!msdu) {
 492                         __skb_queue_purge(list);
 493                         return -ENOENT;
 494                 }
 495
 496                 __skb_queue_tail(list, msdu);
 497
 498                 if (!is_offload) {
 499                         rxd = (void *)msdu->data;
 500
 501                         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 502
 503                         skb_put(msdu, sizeof(*rxd));
 504                         skb_pull(msdu, sizeof(*rxd));
 505                         skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
 506
 507                         if (!(__le32_to_cpu(rxd->attention.flags) &
 508                               RX_ATTENTION_FLAGS_MSDU_DONE)) {
 509                                 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
 510                                 return -EIO;
 511                         }
 512                 }
 513
 514                 msdu_desc++;
 515         }
 516
 517         return 0;
 518 }
 519
 520 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 521 {
 522         struct ath10k *ar = htt->ar;
 523         dma_addr_t paddr;
 524         void *vaddr;
 525         size_t size;
 526         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 527
 528         htt->rx_confused = false;
 529
 530         /* XXX: The fill level could be changed during runtime in response to
 531          * the host processing latency. Is this really worth it?
 532          */
 533         htt->rx_ring.size = HTT_RX_RING_SIZE;
 534         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 535         htt->rx_ring.fill_level = HTT_RX_RING_FILL_LEVEL;
 536
 537         if (!is_power_of_2(htt->rx_ring.size)) {
 538                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 539                 return -EINVAL;
 540         }
 541
 542         htt->rx_ring.netbufs_ring =
 543                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 544                         GFP_KERNEL);
 545         if (!htt->rx_ring.netbufs_ring)
 546                 goto err_netbuf;
 547
 548         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 549
 550         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
 551         if (!vaddr)
 552                 goto err_dma_ring;
 553
 554         htt->rx_ring.paddrs_ring = vaddr;
 555         htt->rx_ring.base_paddr = paddr;
 556
 557         vaddr = dma_alloc_coherent(htt->ar->dev,
 558                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 559                                    &paddr, GFP_DMA);
 560         if (!vaddr)
 561                 goto err_dma_idx;
 562
 563         htt->rx_ring.alloc_idx.vaddr = vaddr;
 564         htt->rx_ring.alloc_idx.paddr = paddr;
 565         htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
 566         *htt->rx_ring.alloc_idx.vaddr = 0;
 567
 568         /* Initialize the Rx refill retry timer */
 569         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 570
 571         spin_lock_init(&htt->rx_ring.lock);
 572
 573         htt->rx_ring.fill_cnt = 0;
 574         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 575         hash_init(htt->rx_ring.skb_table);
 576
 577         tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
 578                      (unsigned long)htt);
 579
 580         skb_queue_head_init(&htt->tx_compl_q);
 581         skb_queue_head_init(&htt->rx_compl_q);
 582         skb_queue_head_init(&htt->rx_in_ord_compl_q);
 583
 584         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 585                      (unsigned long)htt);
 586
 587         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 588                    htt->rx_ring.size, htt->rx_ring.fill_level);
 589         return 0;
 590
 591 err_dma_idx:
 592         dma_free_coherent(htt->ar->dev,
 593                           (htt->rx_ring.size *
 594                            sizeof(htt->rx_ring.paddrs_ring)),
 595                           htt->rx_ring.paddrs_ring,
 596                           htt->rx_ring.base_paddr);
 597 err_dma_ring:
 598         kfree(htt->rx_ring.netbufs_ring);
 599 err_netbuf:
 600         return -ENOMEM;
 601 }
 602
 603 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 604                                           enum htt_rx_mpdu_encrypt_type type)
 605 {
 606         switch (type) {
 607         case HTT_RX_MPDU_ENCRYPT_NONE:
 608                 return 0;
 609         case HTT_RX_MPDU_ENCRYPT_WEP40:
 610         case HTT_RX_MPDU_ENCRYPT_WEP104:
 611                 return IEEE80211_WEP_IV_LEN;
 612         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 613         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 614                 return IEEE80211_TKIP_IV_LEN;
 615         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 616                 return IEEE80211_CCMP_HDR_LEN;
 617         case HTT_RX_MPDU_ENCRYPT_WEP128:
 618         case HTT_RX_MPDU_ENCRYPT_WAPI:
 619                 break;
 620         }
 621
 622         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 623         return 0;
 624 }
 625
 626 #define MICHAEL_MIC_LEN 8
 627
 628 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 629                                          enum htt_rx_mpdu_encrypt_type type)
 630 {
 631         switch (type) {
 632         case HTT_RX_MPDU_ENCRYPT_NONE:
 633                 return 0;
 634         case HTT_RX_MPDU_ENCRYPT_WEP40:
 635         case HTT_RX_MPDU_ENCRYPT_WEP104:
 636                 return IEEE80211_WEP_ICV_LEN;
 637         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 638         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 639                 return IEEE80211_TKIP_ICV_LEN;
 640         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 641                 return IEEE80211_CCMP_MIC_LEN;
 642         case HTT_RX_MPDU_ENCRYPT_WEP128:
 643         case HTT_RX_MPDU_ENCRYPT_WAPI:
 644                 break;
 645         }
 646
 647         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 648         return 0;
 649 }
 650
 651 struct amsdu_subframe_hdr {
 652         u8 dst[ETH_ALEN];
 653         u8 src[ETH_ALEN];
 654         __be16 len;
 655 } __packed;
 656
 657 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
 658
 659 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 660                                   struct ieee80211_rx_status *status,
 661                                   struct htt_rx_desc *rxd)
 662 {
 663         struct ieee80211_supported_band *sband;
 664         u8 cck, rate, bw, sgi, mcs, nss;
 665         u8 preamble = 0;
 666         u8 group_id;
 667         u32 info1, info2, info3;
 668         u32 stbc, nsts_su;
 669
 670         info1 = __le32_to_cpu(rxd->ppdu_start.info1);
 671         info2 = __le32_to_cpu(rxd->ppdu_start.info2);
 672         info3 = __le32_to_cpu(rxd->ppdu_start.info3);
 673
 674         preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
 675
 676         switch (preamble) {
 677         case HTT_RX_LEGACY:
 678                 /* To get legacy rate index band is required. Since band can't
 679                  * be undefined check if freq is non-zero.
 680                  */
 681                 if (!status->freq)
 682                         return;
 683
 684                 cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
 685                 rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
 686                 rate &= ~RX_PPDU_START_RATE_FLAG;
 687
 688                 sband = &ar->mac.sbands[status->band];
 689                 status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate);
 690                 break;
 691         case HTT_RX_HT:
 692         case HTT_RX_HT_WITH_TXBF:
 693                 /* HT-SIG - Table 20-11 in info2 and info3 */
 694                 mcs = info2 & 0x1F;
 695                 nss = mcs >> 3;
 696                 bw = (info2 >> 7) & 1;
 697                 sgi = (info3 >> 7) & 1;
 698
 699                 status->rate_idx = mcs;
 700                 status->flag |= RX_FLAG_HT;
 701                 if (sgi)
 702                         status->flag |= RX_FLAG_SHORT_GI;
 703                 if (bw)
 704                         status->flag |= RX_FLAG_40MHZ;
 705                 break;
 706         case HTT_RX_VHT:
 707         case HTT_RX_VHT_WITH_TXBF:
 708                 /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
 709                    TODO check this */
 710                 bw = info2 & 3;
 711                 sgi = info3 & 1;
 712                 stbc = (info2 >> 3) & 1;
 713                 group_id = (info2 >> 4) & 0x3F;
 714
 715                 if (GROUP_ID_IS_SU_MIMO(group_id)) {
 716                         mcs = (info3 >> 4) & 0x0F;
 717                         nsts_su = ((info2 >> 10) & 0x07);
 718                         if (stbc)
 719                                 nss = (nsts_su >> 2) + 1;
 720                         else
 721                                 nss = (nsts_su + 1);
 722                 } else {
 723                         /* Hardware doesn't decode VHT-SIG-B into Rx descriptor
 724                          * so it's impossible to decode MCS. Also since
 725                          * firmware consumes Group Id Management frames host
 726                          * has no knowledge regarding group/user position
 727                          * mapping so it's impossible to pick the correct Nsts
 728                          * from VHT-SIG-A1.
 729                          *
 730                          * Bandwidth and SGI are valid so report the rateinfo
 731                          * on best-effort basis.
 732                          */
 733                         mcs = 0;
 734                         nss = 1;
 735                 }
 736
 737                 if (mcs > 0x09) {
 738                         ath10k_warn(ar, "invalid MCS received %u\n", mcs);
 739                         ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
 740                                     __le32_to_cpu(rxd->attention.flags),
 741                                     __le32_to_cpu(rxd->mpdu_start.info0),
 742                                     __le32_to_cpu(rxd->mpdu_start.info1),
 743                                     __le32_to_cpu(rxd->msdu_start.common.info0),
 744                                     __le32_to_cpu(rxd->msdu_start.common.info1),
 745                                     rxd->ppdu_start.info0,
 746                                     __le32_to_cpu(rxd->ppdu_start.info1),
 747                                     __le32_to_cpu(rxd->ppdu_start.info2),
 748                                     __le32_to_cpu(rxd->ppdu_start.info3),
 749                                     __le32_to_cpu(rxd->ppdu_start.info4));
 750
 751                         ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
 752                                     __le32_to_cpu(rxd->msdu_end.common.info0),
 753                                     __le32_to_cpu(rxd->mpdu_end.info0));
 754
 755                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
 756                                         "rx desc msdu payload: ",
 757                                         rxd->msdu_payload, 50);
 758                 }
 759
 760                 status->rate_idx = mcs;
 761                 status->vht_nss = nss;
 762
 763                 if (sgi)
 764                         status->flag |= RX_FLAG_SHORT_GI;
 765
 766                 switch (bw) {
 767                 /* 20MHZ */
 768                 case 0:
 769                         break;
 770                 /* 40MHZ */
 771                 case 1:
 772                         status->flag |= RX_FLAG_40MHZ;
 773                         break;
 774                 /* 80MHZ */
 775                 case 2:
 776                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 777                 }
 778
 779                 status->flag |= RX_FLAG_VHT;
 780                 break;
 781         default:
 782                 break;
 783         }
 784 }
 785
 786 static struct ieee80211_channel *
 787 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
 788 {
 789         struct ath10k_peer *peer;
 790         struct ath10k_vif *arvif;
 791         struct cfg80211_chan_def def;
 792         u16 peer_id;
 793
 794         lockdep_assert_held(&ar->data_lock);
 795
 796         if (!rxd)
 797                 return NULL;
 798
 799         if (rxd->attention.flags &
 800             __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
 801                 return NULL;
 802
 803         if (!(rxd->msdu_end.common.info0 &
 804               __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
 805                 return NULL;
 806
 807         peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 808                      RX_MPDU_START_INFO0_PEER_IDX);
 809
 810         peer = ath10k_peer_find_by_id(ar, peer_id);
 811         if (!peer)
 812                 return NULL;
 813
 814         arvif = ath10k_get_arvif(ar, peer->vdev_id);
 815         if (WARN_ON_ONCE(!arvif))
 816                 return NULL;
 817
 818         if (WARN_ON(ath10k_mac_vif_chan(arvif->vif, &def)))
 819                 return NULL;
 820
 821         return def.chan;
 822 }
 823
 824 static struct ieee80211_channel *
 825 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
 826 {
 827         struct ath10k_vif *arvif;
 828         struct cfg80211_chan_def def;
 829
 830         lockdep_assert_held(&ar->data_lock);
 831
 832         list_for_each_entry(arvif, &ar->arvifs, list) {
 833                 if (arvif->vdev_id == vdev_id &&
 834                     ath10k_mac_vif_chan(arvif->vif, &def) == 0)
 835                         return def.chan;
 836         }
 837
 838         return NULL;
 839 }
 840
 841 static void
 842 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
 843                               struct ieee80211_chanctx_conf *conf,
 844                               void *data)
 845 {
 846         struct cfg80211_chan_def *def = data;
 847
 848         *def = conf->def;
 849 }
 850
 851 static struct ieee80211_channel *
 852 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
 853 {
 854         struct cfg80211_chan_def def = {};
 855
 856         ieee80211_iter_chan_contexts_atomic(ar->hw,
 857                                             ath10k_htt_rx_h_any_chan_iter,
 858                                             &def);
 859
 860         return def.chan;
 861 }
 862
 863 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 864                                     struct ieee80211_rx_status *status,
 865                                     struct htt_rx_desc *rxd,
 866                                     u32 vdev_id)
 867 {
 868         struct ieee80211_channel *ch;
 869
 870         spin_lock_bh(&ar->data_lock);
 871         ch = ar->scan_channel;
 872         if (!ch)
 873                 ch = ar->rx_channel;
 874         if (!ch)
 875                 ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
 876         if (!ch)
 877                 ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
 878         if (!ch)
 879                 ch = ath10k_htt_rx_h_any_channel(ar);
 880         spin_unlock_bh(&ar->data_lock);
 881
 882         if (!ch)
 883                 return false;
 884
 885         status->band = ch->band;
 886         status->freq = ch->center_freq;
 887
 888         return true;
 889 }
 890
 891 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
 892                                    struct ieee80211_rx_status *status,
 893                                    struct htt_rx_desc *rxd)
 894 {
 895         /* FIXME: Get real NF */
 896         status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
 897                          rxd->ppdu_start.rssi_comb;
 898         status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
 899 }
 900
 901 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
 902                                     struct ieee80211_rx_status *status,
 903                                     struct htt_rx_desc *rxd)
 904 {
 905         /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
 906          * means all prior MSDUs in a PPDU are reported to mac80211 without the
 907          * TSF. Is it worth holding frames until end of PPDU is known?
 908          *
 909          * FIXME: Can we get/compute 64bit TSF?
 910          */
 911         status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
 912         status->flag |= RX_FLAG_MACTIME_END;
 913 }
 914
 915 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
 916                                  struct sk_buff_head *amsdu,
 917                                  struct ieee80211_rx_status *status,
 918                                  u32 vdev_id)
 919 {
 920         struct sk_buff *first;
 921         struct htt_rx_desc *rxd;
 922         bool is_first_ppdu;
 923         bool is_last_ppdu;
 924
 925         if (skb_queue_empty(amsdu))
 926                 return;
 927
 928         first = skb_peek(amsdu);
 929         rxd = (void *)first->data - sizeof(*rxd);
 930
 931         is_first_ppdu = !!(rxd->attention.flags &
 932                            __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
 933         is_last_ppdu = !!(rxd->attention.flags &
 934                           __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
 935
 936         if (is_first_ppdu) {
 937                 /* New PPDU starts so clear out the old per-PPDU status. */
 938                 status->freq = 0;
 939                 status->rate_idx = 0;
 940                 status->vht_nss = 0;
 941                 status->vht_flag &= ~RX_VHT_FLAG_80MHZ;
 942                 status->flag &= ~(RX_FLAG_HT |
 943                                   RX_FLAG_VHT |
 944                                   RX_FLAG_SHORT_GI |
 945                                   RX_FLAG_40MHZ |
 946                                   RX_FLAG_MACTIME_END);
 947                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
 948
 949                 ath10k_htt_rx_h_signal(ar, status, rxd);
 950                 ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
 951                 ath10k_htt_rx_h_rates(ar, status, rxd);
 952         }
 953
 954         if (is_last_ppdu)
 955                 ath10k_htt_rx_h_mactime(ar, status, rxd);
 956 }
 957
 958 static const char * const tid_to_ac[] = {
 959         "BE",
 960         "BK",
 961         "BK",
 962         "BE",
 963         "VI",
 964         "VI",
 965         "VO",
 966         "VO",
 967 };
 968
 969 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 970 {
 971         u8 *qc;
 972         int tid;
 973
 974         if (!ieee80211_is_data_qos(hdr->frame_control))
 975                 return "";
 976
 977         qc = ieee80211_get_qos_ctl(hdr);
 978         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 979         if (tid < 8)
 980                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 981         else
 982                 snprintf(out, size, "tid %d", tid);
 983
 984         return out;
 985 }
 986
 987 static void ath10k_process_rx(struct ath10k *ar,
 988                               struct ieee80211_rx_status *rx_status,
 989                               struct sk_buff *skb)
 990 {
 991         struct ieee80211_rx_status *status;
 992         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 993         char tid[32];
 994
 995         status = IEEE80211_SKB_RXCB(skb);
 996         *status = *rx_status;
 997
 998         ath10k_dbg(ar, ATH10K_DBG_DATA,
 999                    "rx skb %p len %u peer %pM %s %s sn %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%llx fcs-err %i mic-err %i amsdu-more %i\n",
1000                    skb,
1001                    skb->len,
1002                    ieee80211_get_SA(hdr),
1003                    ath10k_get_tid(hdr, tid, sizeof(tid)),
1004                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
1005                                                         "mcast" : "ucast",
1006                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
1007                    status->flag == 0 ? "legacy" : "",
1008                    status->flag & RX_FLAG_HT ? "ht" : "",
1009                    status->flag & RX_FLAG_VHT ? "vht" : "",
1010                    status->flag & RX_FLAG_40MHZ ? "40" : "",
1011                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
1012                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
1013                    status->rate_idx,
1014                    status->vht_nss,
1015                    status->freq,
1016                    status->band, status->flag,
1017                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1018                    !!(status->flag & RX_FLAG_MMIC_ERROR),
1019                    !!(status->flag & RX_FLAG_AMSDU_MORE));
1020         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1021                         skb->data, skb->len);
1022         trace_ath10k_rx_hdr(ar, skb->data, skb->len);
1023         trace_ath10k_rx_payload(ar, skb->data, skb->len);
1024
1025         ieee80211_rx(ar->hw, skb);
1026 }
1027
1028 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
1029                                       struct ieee80211_hdr *hdr)
1030 {
1031         int len = ieee80211_hdrlen(hdr->frame_control);
1032
1033         if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
1034                       ar->fw_features))
1035                 len = round_up(len, 4);
1036
1037         return len;
1038 }
1039
1040 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
1041                                         struct sk_buff *msdu,
1042                                         struct ieee80211_rx_status *status,
1043                                         enum htt_rx_mpdu_encrypt_type enctype,
1044                                         bool is_decrypted)
1045 {
1046         struct ieee80211_hdr *hdr;
1047         struct htt_rx_desc *rxd;
1048         size_t hdr_len;
1049         size_t crypto_len;
1050         bool is_first;
1051         bool is_last;
1052
1053         rxd = (void *)msdu->data - sizeof(*rxd);
1054         is_first = !!(rxd->msdu_end.common.info0 &
1055                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1056         is_last = !!(rxd->msdu_end.common.info0 &
1057                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1058
1059         /* Delivered decapped frame:
1060          * [802.11 header]
1061          * [crypto param] <-- can be trimmed if !fcs_err &&
1062          *                    !decrypt_err && !peer_idx_invalid
1063          * [amsdu header] <-- only if A-MSDU
1064          * [rfc1042/llc]
1065          * [payload]
1066          * [FCS] <-- at end, needs to be trimmed
1067          */
1068
1069         /* This probably shouldn't happen but warn just in case */
1070         if (unlikely(WARN_ON_ONCE(!is_first)))
1071                 return;
1072
1073         /* This probably shouldn't happen but warn just in case */
1074         if (unlikely(WARN_ON_ONCE(!(is_first && is_last))))
1075                 return;
1076
1077         skb_trim(msdu, msdu->len - FCS_LEN);
1078
1079         /* In most cases this will be true for sniffed frames. It makes sense
1080          * to deliver them as-is without stripping the crypto param. This is
1081          * necessary for software based decryption.
1082          *
1083          * If there's no error then the frame is decrypted. At least that is
1084          * the case for frames that come in via fragmented rx indication.
1085          */
1086         if (!is_decrypted)
1087                 return;
1088
1089         /* The payload is decrypted so strip crypto params. Start from tail
1090          * since hdr is used to compute some stuff.
1091          */
1092
1093         hdr = (void *)msdu->data;
1094
1095         /* Tail */
1096         if (status->flag & RX_FLAG_IV_STRIPPED) {
1097                 skb_trim(msdu, msdu->len -
1098                          ath10k_htt_rx_crypto_tail_len(ar, enctype));
1099         } else {
1100                 /* MIC */
1101                 if ((status->flag & RX_FLAG_MIC_STRIPPED) &&
1102                     enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2)
1103                         skb_trim(msdu, msdu->len - 8);
1104
1105                 /* ICV */
1106                 if (status->flag & RX_FLAG_ICV_STRIPPED &&
1107                     enctype != HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2)
1108                         skb_trim(msdu, msdu->len -
1109                                  ath10k_htt_rx_crypto_tail_len(ar, enctype));
1110         }
1111
1112         /* MMIC */
1113         if (!ieee80211_has_morefrags(hdr->frame_control) &&
1114             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1115                 skb_trim(msdu, msdu->len - 8);
1116
1117         /* Head */
1118         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1119         crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1120
1121         memmove((void *)msdu->data + crypto_len,
1122                 (void *)msdu->data, hdr_len);
1123         skb_pull(msdu, crypto_len);
1124 }
1125
1126 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1127                                           struct sk_buff *msdu,
1128                                           struct ieee80211_rx_status *status,
1129                                           const u8 first_hdr[64],
1130                                           enum htt_rx_mpdu_encrypt_type enctype)
1131 {
1132         struct ieee80211_hdr *hdr;
1133         size_t hdr_len;
1134         u8 da[ETH_ALEN];
1135         u8 sa[ETH_ALEN];
1136         int bytes_aligned = ar->hw_params.decap_align_bytes;
1137
1138         /* Delivered decapped frame:
1139          * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1140          * [rfc1042/llc]
1141          *
1142          * Note: The nwifi header doesn't have QoS Control and is
1143          * (always?) a 3addr frame.
1144          *
1145          * Note2: There's no A-MSDU subframe header. Even if it's part
1146          * of an A-MSDU.
1147          */
1148
1149         /* pull decapped header and copy SA & DA */
1150         hdr = (struct ieee80211_hdr *)msdu->data;
1151         hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1152         ether_addr_copy(da, ieee80211_get_DA(hdr));
1153         ether_addr_copy(sa, ieee80211_get_SA(hdr));
1154         skb_pull(msdu, hdr_len);
1155
1156         /* push original 802.11 header */
1157         hdr = (struct ieee80211_hdr *)first_hdr;
1158         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1159
1160         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1161                 memcpy(skb_push(msdu,
1162                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1163                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1164                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1165         }
1166
1167         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1168
1169         /* original 802.11 header has a different DA and in
1170          * case of 4addr it may also have different SA
1171          */
1172         hdr = (struct ieee80211_hdr *)msdu->data;
1173         ether_addr_copy(ieee80211_get_DA(hdr), da);
1174         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1175 }
1176
1177 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1178                                           struct sk_buff *msdu,
1179                                           enum htt_rx_mpdu_encrypt_type enctype)
1180 {
1181         struct ieee80211_hdr *hdr;
1182         struct htt_rx_desc *rxd;
1183         size_t hdr_len, crypto_len;
1184         void *rfc1042;
1185         bool is_first, is_last, is_amsdu;
1186         int bytes_aligned = ar->hw_params.decap_align_bytes;
1187
1188         rxd = (void *)msdu->data - sizeof(*rxd);
1189         hdr = (void *)rxd->rx_hdr_status;
1190
1191         is_first = !!(rxd->msdu_end.common.info0 &
1192                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1193         is_last = !!(rxd->msdu_end.common.info0 &
1194                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1195         is_amsdu = !(is_first && is_last);
1196
1197         rfc1042 = hdr;
1198
1199         if (is_first) {
1200                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1201                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1202
1203                 rfc1042 += round_up(hdr_len, bytes_aligned) +
1204                            round_up(crypto_len, bytes_aligned);
1205         }
1206
1207         if (is_amsdu)
1208                 rfc1042 += sizeof(struct amsdu_subframe_hdr);
1209
1210         return rfc1042;
1211 }
1212
1213 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1214                                         struct sk_buff *msdu,
1215                                         struct ieee80211_rx_status *status,
1216                                         const u8 first_hdr[64],
1217                                         enum htt_rx_mpdu_encrypt_type enctype)
1218 {
1219         struct ieee80211_hdr *hdr;
1220         struct ethhdr *eth;
1221         size_t hdr_len;
1222         void *rfc1042;
1223         u8 da[ETH_ALEN];
1224         u8 sa[ETH_ALEN];
1225         int bytes_aligned = ar->hw_params.decap_align_bytes;
1226
1227         /* Delivered decapped frame:
1228          * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1229          * [payload]
1230          */
1231
1232         rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1233         if (WARN_ON_ONCE(!rfc1042))
1234                 return;
1235
1236         /* pull decapped header and copy SA & DA */
1237         eth = (struct ethhdr *)msdu->data;
1238         ether_addr_copy(da, eth->h_dest);
1239         ether_addr_copy(sa, eth->h_source);
1240         skb_pull(msdu, sizeof(struct ethhdr));
1241
1242         /* push rfc1042/llc/snap */
1243         memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1244                sizeof(struct rfc1042_hdr));
1245
1246         /* push original 802.11 header */
1247         hdr = (struct ieee80211_hdr *)first_hdr;
1248         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1249
1250         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1251                 memcpy(skb_push(msdu,
1252                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1253                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1254                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1255         }
1256
1257         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1258
1259         /* original 802.11 header has a different DA and in
1260          * case of 4addr it may also have different SA
1261          */
1262         hdr = (struct ieee80211_hdr *)msdu->data;
1263         ether_addr_copy(ieee80211_get_DA(hdr), da);
1264         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1265 }
1266
1267 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1268                                          struct sk_buff *msdu,
1269                                          struct ieee80211_rx_status *status,
1270                                          const u8 first_hdr[64],
1271                                          enum htt_rx_mpdu_encrypt_type enctype)
1272 {
1273         struct ieee80211_hdr *hdr;
1274         size_t hdr_len;
1275         int bytes_aligned = ar->hw_params.decap_align_bytes;
1276
1277         /* Delivered decapped frame:
1278          * [amsdu header] <-- replaced with 802.11 hdr
1279          * [rfc1042/llc]
1280          * [payload]
1281          */
1282
1283         skb_pull(msdu, sizeof(struct amsdu_subframe_hdr));
1284
1285         hdr = (struct ieee80211_hdr *)first_hdr;
1286         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1287
1288         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1289                 memcpy(skb_push(msdu,
1290                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1291                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1292                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1293         }
1294
1295         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1296 }
1297
1298 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1299                                     struct sk_buff *msdu,
1300                                     struct ieee80211_rx_status *status,
1301                                     u8 first_hdr[64],
1302                                     enum htt_rx_mpdu_encrypt_type enctype,
1303                                     bool is_decrypted)
1304 {
1305         struct htt_rx_desc *rxd;
1306         enum rx_msdu_decap_format decap;
1307
1308         /* First msdu's decapped header:
1309          * [802.11 header] <-- padded to 4 bytes long
1310          * [crypto param] <-- padded to 4 bytes long
1311          * [amsdu header] <-- only if A-MSDU
1312          * [rfc1042/llc]
1313          *
1314          * Other (2nd, 3rd, ..) msdu's decapped header:
1315          * [amsdu header] <-- only if A-MSDU
1316          * [rfc1042/llc]
1317          */
1318
1319         rxd = (void *)msdu->data - sizeof(*rxd);
1320         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1321                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1322
1323         switch (decap) {
1324         case RX_MSDU_DECAP_RAW:
1325                 ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1326                                             is_decrypted);
1327                 break;
1328         case RX_MSDU_DECAP_NATIVE_WIFI:
1329                 ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
1330                                               enctype);
1331                 break;
1332         case RX_MSDU_DECAP_ETHERNET2_DIX:
1333                 ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1334                 break;
1335         case RX_MSDU_DECAP_8023_SNAP_LLC:
1336                 ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr,
1337                                              enctype);
1338                 break;
1339         }
1340 }
1341
1342 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1343 {
1344         struct htt_rx_desc *rxd;
1345         u32 flags, info;
1346         bool is_ip4, is_ip6;
1347         bool is_tcp, is_udp;
1348         bool ip_csum_ok, tcpudp_csum_ok;
1349
1350         rxd = (void *)skb->data - sizeof(*rxd);
1351         flags = __le32_to_cpu(rxd->attention.flags);
1352         info = __le32_to_cpu(rxd->msdu_start.common.info1);
1353
1354         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1355         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1356         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1357         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1358         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1359         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1360
1361         if (!is_ip4 && !is_ip6)
1362                 return CHECKSUM_NONE;
1363         if (!is_tcp && !is_udp)
1364                 return CHECKSUM_NONE;
1365         if (!ip_csum_ok)
1366                 return CHECKSUM_NONE;
1367         if (!tcpudp_csum_ok)
1368                 return CHECKSUM_NONE;
1369
1370         return CHECKSUM_UNNECESSARY;
1371 }
1372
1373 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
1374 {
1375         msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
1376 }
1377
1378 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1379                                  struct sk_buff_head *amsdu,
1380                                  struct ieee80211_rx_status *status,
1381                                  bool fill_crypt_header)
1382 {
1383         struct sk_buff *first;
1384         struct sk_buff *last;
1385         struct sk_buff *msdu;
1386         struct htt_rx_desc *rxd;
1387         struct ieee80211_hdr *hdr;
1388         enum htt_rx_mpdu_encrypt_type enctype;
1389         u8 first_hdr[64];
1390         u8 *qos;
1391         bool has_fcs_err;
1392         bool has_crypto_err;
1393         bool has_tkip_err;
1394         bool has_peer_idx_invalid;
1395         bool is_decrypted;
1396         u32 attention;
1397
1398         if (skb_queue_empty(amsdu))
1399                 return;
1400
1401         first = skb_peek(amsdu);
1402         rxd = (void *)first->data - sizeof(*rxd);
1403
1404         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1405                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1406
1407         /* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1408          * decapped header. It'll be used for undecapping of each MSDU.
1409          */
1410         hdr = (void *)rxd->rx_hdr_status;
1411         memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1412
1413         /* Each A-MSDU subframe will use the original header as the base and be
1414          * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1415          */
1416         hdr = (void *)first_hdr;
1417
1418         if (ieee80211_is_data_qos(hdr->frame_control)) {
1419                 qos = ieee80211_get_qos_ctl(hdr);
1420                 qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1421         }
1422
1423         /* Some attention flags are valid only in the last MSDU. */
1424         last = skb_peek_tail(amsdu);
1425         rxd = (void *)last->data - sizeof(*rxd);
1426         attention = __le32_to_cpu(rxd->attention.flags);
1427
1428         has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1429         has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1430         has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1431         has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1432
1433         /* Note: If hardware captures an encrypted frame that it can't decrypt,
1434          * e.g. due to fcs error, missing peer or invalid key data it will
1435          * report the frame as raw.
1436          */
1437         is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
1438                         !has_fcs_err &&
1439                         !has_crypto_err &&
1440                         !has_peer_idx_invalid);
1441
1442         /* Clear per-MPDU flags while leaving per-PPDU flags intact. */
1443         status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
1444                           RX_FLAG_MMIC_ERROR |
1445                           RX_FLAG_DECRYPTED |
1446                           RX_FLAG_IV_STRIPPED |
1447                           RX_FLAG_MMIC_STRIPPED);
1448
1449         if (has_fcs_err)
1450                 status->flag |= RX_FLAG_FAILED_FCS_CRC;
1451
1452         if (has_tkip_err)
1453                 status->flag |= RX_FLAG_MMIC_ERROR;
1454
1455         if (is_decrypted) {
1456                 status->flag |= RX_FLAG_DECRYPTED |
1457                                 RX_FLAG_MMIC_STRIPPED;
1458
1459                 if (fill_crypt_header)
1460                         status->flag |= RX_FLAG_MIC_STRIPPED |
1461                                         RX_FLAG_ICV_STRIPPED;
1462                 else
1463                         status->flag |= RX_FLAG_IV_STRIPPED;
1464         }
1465
1466         skb_queue_walk(amsdu, msdu) {
1467                 ath10k_htt_rx_h_csum_offload(msdu);
1468                 ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
1469                                         is_decrypted);
1470
1471                 /* Undecapping involves copying the original 802.11 header back
1472                  * to sk_buff. If frame is protected and hardware has decrypted
1473                  * it then remove the protected bit.
1474                  */
1475                 if (!is_decrypted)
1476                         continue;
1477
1478                 if (fill_crypt_header)
1479                         continue;
1480
1481                 hdr = (void *)msdu->data;
1482                 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1483         }
1484 }
1485
1486 static void ath10k_htt_rx_h_deliver(struct ath10k *ar,
1487                                     struct sk_buff_head *amsdu,
1488                                     struct ieee80211_rx_status *status)
1489 {
1490         struct sk_buff *msdu;
1491         struct sk_buff *first_subframe;
1492
1493         first_subframe = skb_peek(amsdu);
1494
1495         while ((msdu = __skb_dequeue(amsdu))) {
1496                 /* Setup per-MSDU flags */
1497                 if (skb_queue_empty(amsdu))
1498                         status->flag &= ~RX_FLAG_AMSDU_MORE;
1499                 else
1500                         status->flag |= RX_FLAG_AMSDU_MORE;
1501
1502                 if (msdu == first_subframe) {
1503                         first_subframe = NULL;
1504                         status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
1505                 } else {
1506                         status->flag |= RX_FLAG_ALLOW_SAME_PN;
1507                 }
1508
1509                 ath10k_process_rx(ar, status, msdu);
1510         }
1511 }
1512
1513 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu)
1514 {
1515         struct sk_buff *skb, *first;
1516         int space;
1517         int total_len = 0;
1518
1519         /* TODO:  Might could optimize this by using
1520          * skb_try_coalesce or similar method to
1521          * decrease copying, or maybe get mac80211 to
1522          * provide a way to just receive a list of
1523          * skb?
1524          */
1525
1526         first = __skb_dequeue(amsdu);
1527
1528         /* Allocate total length all at once. */
1529         skb_queue_walk(amsdu, skb)
1530                 total_len += skb->len;
1531
1532         space = total_len - skb_tailroom(first);
1533         if ((space > 0) &&
1534             (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
1535                 /* TODO:  bump some rx-oom error stat */
1536                 /* put it back together so we can free the
1537                  * whole list at once.
1538                  */
1539                 __skb_queue_head(amsdu, first);
1540                 return -1;
1541         }
1542
1543         /* Walk list again, copying contents into
1544          * msdu_head
1545          */
1546         while ((skb = __skb_dequeue(amsdu))) {
1547                 skb_copy_from_linear_data(skb, skb_put(first, skb->len),
1548                                           skb->len);
1549                 dev_kfree_skb_any(skb);
1550         }
1551
1552         __skb_queue_head(amsdu, first);
1553         return 0;
1554 }
1555
1556 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
1557                                     struct sk_buff_head *amsdu,
1558                                     bool chained)
1559 {
1560         struct sk_buff *first;
1561         struct htt_rx_desc *rxd;
1562         enum rx_msdu_decap_format decap;
1563
1564         first = skb_peek(amsdu);
1565         rxd = (void *)first->data - sizeof(*rxd);
1566         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1567                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1568
1569         if (!chained)
1570                 return;
1571
1572         /* FIXME: Current unchaining logic can only handle simple case of raw
1573          * msdu chaining. If decapping is other than raw the chaining may be
1574          * more complex and this isn't handled by the current code. Don't even
1575          * try re-constructing such frames - it'll be pretty much garbage.
1576          */
1577         if (decap != RX_MSDU_DECAP_RAW ||
1578             skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
1579                 __skb_queue_purge(amsdu);
1580                 return;
1581         }
1582
1583         ath10k_unchain_msdu(amsdu);
1584 }
1585
1586 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
1587                                         struct sk_buff_head *amsdu,
1588                                         struct ieee80211_rx_status *rx_status)
1589 {
1590         struct sk_buff *msdu;
1591         struct htt_rx_desc *rxd;
1592         bool is_mgmt;
1593         bool has_fcs_err;
1594
1595         msdu = skb_peek(amsdu);
1596         rxd = (void *)msdu->data - sizeof(*rxd);
1597
1598         /* FIXME: It might be a good idea to do some fuzzy-testing to drop
1599          * invalid/dangerous frames.
1600          */
1601
1602         if (!rx_status->freq) {
1603                 ath10k_warn(ar, "no channel configured; ignoring frame(s)!\n");
1604                 return false;
1605         }
1606
1607         is_mgmt = !!(rxd->attention.flags &
1608                      __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1609         has_fcs_err = !!(rxd->attention.flags &
1610                          __cpu_to_le32(RX_ATTENTION_FLAGS_FCS_ERR));
1611
1612         /* Management frames are handled via WMI events. The pros of such
1613          * approach is that channel is explicitly provided in WMI events
1614          * whereas HTT doesn't provide channel information for Rxed frames.
1615          *
1616          * However some firmware revisions don't report corrupted frames via
1617          * WMI so don't drop them.
1618          */
1619         if (is_mgmt && !has_fcs_err) {
1620                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1621                 return false;
1622         }
1623
1624         if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
1625                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1626                 return false;
1627         }
1628
1629         return true;
1630 }
1631
1632 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
1633                                    struct sk_buff_head *amsdu,
1634                                    struct ieee80211_rx_status *rx_status)
1635 {
1636         if (skb_queue_empty(amsdu))
1637                 return;
1638
1639         if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
1640                 return;
1641
1642         __skb_queue_purge(amsdu);
1643 }
1644
1645 static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
1646                                   struct htt_rx_indication *rx)
1647 {
1648         struct ath10k *ar = htt->ar;
1649         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1650         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1651         struct sk_buff_head amsdu;
1652         int num_mpdu_ranges;
1653         int fw_desc_len;
1654         u8 *fw_desc;
1655         int i, ret, mpdu_count = 0;
1656
1657         lockdep_assert_held(&htt->rx_ring.lock);
1658
1659         if (htt->rx_confused)
1660                 return;
1661
1662         fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
1663         fw_desc = (u8 *)&rx->fw_desc;
1664
1665         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1666                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1667         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1668
1669         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1670                         rx, sizeof(*rx) +
1671                         (sizeof(struct htt_rx_indication_mpdu_range) *
1672                                 num_mpdu_ranges));
1673
1674         for (i = 0; i < num_mpdu_ranges; i++)
1675                 mpdu_count += mpdu_ranges[i].mpdu_count;
1676
1677         while (mpdu_count--) {
1678                 __skb_queue_head_init(&amsdu);
1679                 ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc,
1680                                               &fw_desc_len, &amsdu);
1681                 if (ret < 0) {
1682                         ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
1683                         __skb_queue_purge(&amsdu);
1684                         /* FIXME: It's probably a good idea to reboot the
1685                          * device instead of leaving it inoperable.
1686                          */
1687                         htt->rx_confused = true;
1688                         break;
1689                 }
1690
1691                 ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
1692                 ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0);
1693                 ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
1694                 ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true);
1695                 ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status);
1696         }
1697
1698         tasklet_schedule(&htt->rx_replenish_task);
1699 }
1700
1701 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1702                                        struct htt_rx_fragment_indication *frag)
1703 {
1704         struct ath10k *ar = htt->ar;
1705         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1706         struct sk_buff_head amsdu;
1707         int ret;
1708         u8 *fw_desc;
1709         int fw_desc_len;
1710
1711         fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
1712         fw_desc = (u8 *)frag->fw_msdu_rx_desc;
1713
1714         __skb_queue_head_init(&amsdu);
1715
1716         spin_lock_bh(&htt->rx_ring.lock);
1717         ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1718                                       &amsdu);
1719         spin_unlock_bh(&htt->rx_ring.lock);
1720
1721         tasklet_schedule(&htt->rx_replenish_task);
1722
1723         ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1724
1725         if (ret) {
1726                 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1727                             ret);
1728                 __skb_queue_purge(&amsdu);
1729                 return;
1730         }
1731
1732         if (skb_queue_len(&amsdu) != 1) {
1733                 ath10k_warn(ar, "failed to pop frag amsdu: too many msdus\n");
1734                 __skb_queue_purge(&amsdu);
1735                 return;
1736         }
1737
1738         ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
1739         ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
1740         ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true);
1741         ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status);
1742
1743         if (fw_desc_len > 0) {
1744                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1745                            "expecting more fragmented rx in one indication %d\n",
1746                            fw_desc_len);
1747         }
1748 }
1749
1750 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
1751                                        struct sk_buff *skb)
1752 {
1753         struct ath10k_htt *htt = &ar->htt;
1754         struct htt_resp *resp = (struct htt_resp *)skb->data;
1755         struct htt_tx_done tx_done = {};
1756         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1757         __le16 msdu_id;
1758         int i;
1759
1760         switch (status) {
1761         case HTT_DATA_TX_STATUS_NO_ACK:
1762                 tx_done.no_ack = true;
1763                 break;
1764         case HTT_DATA_TX_STATUS_OK:
1765                 tx_done.success = true;
1766                 break;
1767         case HTT_DATA_TX_STATUS_DISCARD:
1768         case HTT_DATA_TX_STATUS_POSTPONE:
1769         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1770                 tx_done.discard = true;
1771                 break;
1772         default:
1773                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1774                 tx_done.discard = true;
1775                 break;
1776         }
1777
1778         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1779                    resp->data_tx_completion.num_msdus);
1780
1781         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1782                 msdu_id = resp->data_tx_completion.msdus[i];
1783                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1784                 ath10k_txrx_tx_unref(htt, &tx_done);
1785         }
1786 }
1787
1788 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1789 {
1790         struct htt_rx_addba *ev = &resp->rx_addba;
1791         struct ath10k_peer *peer;
1792         struct ath10k_vif *arvif;
1793         u16 info0, tid, peer_id;
1794
1795         info0 = __le16_to_cpu(ev->info0);
1796         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1797         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1798
1799         ath10k_dbg(ar, ATH10K_DBG_HTT,
1800                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1801                    tid, peer_id, ev->window_size);
1802
1803         spin_lock_bh(&ar->data_lock);
1804         peer = ath10k_peer_find_by_id(ar, peer_id);
1805         if (!peer) {
1806                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1807                             peer_id);
1808                 spin_unlock_bh(&ar->data_lock);
1809                 return;
1810         }
1811
1812         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1813         if (!arvif) {
1814                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1815                             peer->vdev_id);
1816                 spin_unlock_bh(&ar->data_lock);
1817                 return;
1818         }
1819
1820         ath10k_dbg(ar, ATH10K_DBG_HTT,
1821                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1822                    peer->addr, tid, ev->window_size);
1823
1824         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1825         spin_unlock_bh(&ar->data_lock);
1826 }
1827
1828 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1829 {
1830         struct htt_rx_delba *ev = &resp->rx_delba;
1831         struct ath10k_peer *peer;
1832         struct ath10k_vif *arvif;
1833         u16 info0, tid, peer_id;
1834
1835         info0 = __le16_to_cpu(ev->info0);
1836         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1837         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1838
1839         ath10k_dbg(ar, ATH10K_DBG_HTT,
1840                    "htt rx delba tid %hu peer_id %hu\n",
1841                    tid, peer_id);
1842
1843         spin_lock_bh(&ar->data_lock);
1844         peer = ath10k_peer_find_by_id(ar, peer_id);
1845         if (!peer) {
1846                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1847                             peer_id);
1848                 spin_unlock_bh(&ar->data_lock);
1849                 return;
1850         }
1851
1852         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1853         if (!arvif) {
1854                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1855                             peer->vdev_id);
1856                 spin_unlock_bh(&ar->data_lock);
1857                 return;
1858         }
1859
1860         ath10k_dbg(ar, ATH10K_DBG_HTT,
1861                    "htt rx stop rx ba session sta %pM tid %hu\n",
1862                    peer->addr, tid);
1863
1864         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1865         spin_unlock_bh(&ar->data_lock);
1866 }
1867
1868 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
1869                                        struct sk_buff_head *amsdu)
1870 {
1871         struct sk_buff *msdu;
1872         struct htt_rx_desc *rxd;
1873
1874         if (skb_queue_empty(list))
1875                 return -ENOBUFS;
1876
1877         if (WARN_ON(!skb_queue_empty(amsdu)))
1878                 return -EINVAL;
1879
1880         while ((msdu = __skb_dequeue(list))) {
1881                 __skb_queue_tail(amsdu, msdu);
1882
1883                 rxd = (void *)msdu->data - sizeof(*rxd);
1884                 if (rxd->msdu_end.common.info0 &
1885                     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
1886                         break;
1887         }
1888
1889         msdu = skb_peek_tail(amsdu);
1890         rxd = (void *)msdu->data - sizeof(*rxd);
1891         if (!(rxd->msdu_end.common.info0 &
1892               __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
1893                 skb_queue_splice_init(amsdu, list);
1894                 return -EAGAIN;
1895         }
1896
1897         return 0;
1898 }
1899
1900 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
1901                                             struct sk_buff *skb)
1902 {
1903         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1904
1905         if (!ieee80211_has_protected(hdr->frame_control))
1906                 return;
1907
1908         /* Offloaded frames are already decrypted but firmware insists they are
1909          * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
1910          * will drop the frame.
1911          */
1912
1913         hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1914         status->flag |= RX_FLAG_DECRYPTED |
1915                         RX_FLAG_IV_STRIPPED |
1916                         RX_FLAG_MMIC_STRIPPED;
1917 }
1918
1919 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
1920                                        struct sk_buff_head *list)
1921 {
1922         struct ath10k_htt *htt = &ar->htt;
1923         struct ieee80211_rx_status *status = &htt->rx_status;
1924         struct htt_rx_offload_msdu *rx;
1925         struct sk_buff *msdu;
1926         size_t offset;
1927
1928         while ((msdu = __skb_dequeue(list))) {
1929                 /* Offloaded frames don't have Rx descriptor. Instead they have
1930                  * a short meta information header.
1931                  */
1932
1933                 rx = (void *)msdu->data;
1934
1935                 skb_put(msdu, sizeof(*rx));
1936                 skb_pull(msdu, sizeof(*rx));
1937
1938                 if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
1939                         ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
1940                         dev_kfree_skb_any(msdu);
1941                         continue;
1942                 }
1943
1944                 skb_put(msdu, __le16_to_cpu(rx->msdu_len));
1945
1946                 /* Offloaded rx header length isn't multiple of 2 nor 4 so the
1947                  * actual payload is unaligned. Align the frame.  Otherwise
1948                  * mac80211 complains.  This shouldn't reduce performance much
1949                  * because these offloaded frames are rare.
1950                  */
1951                 offset = 4 - ((unsigned long)msdu->data & 3);
1952                 skb_put(msdu, offset);
1953                 memmove(msdu->data + offset, msdu->data, msdu->len);
1954                 skb_pull(msdu, offset);
1955
1956                 /* FIXME: The frame is NWifi. Re-construct QoS Control
1957                  * if possible later.
1958                  */
1959
1960                 memset(status, 0, sizeof(*status));
1961                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1962
1963                 ath10k_htt_rx_h_rx_offload_prot(status, msdu);
1964                 ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
1965                 ath10k_process_rx(ar, status, msdu);
1966         }
1967 }
1968
1969 static void ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
1970 {
1971         struct ath10k_htt *htt = &ar->htt;
1972         struct htt_resp *resp = (void *)skb->data;
1973         struct ieee80211_rx_status *status = &htt->rx_status;
1974         struct sk_buff_head list;
1975         struct sk_buff_head amsdu;
1976         u16 peer_id;
1977         u16 msdu_count;
1978         u8 vdev_id;
1979         u8 tid;
1980         bool offload;
1981         bool frag;
1982         int ret;
1983
1984         lockdep_assert_held(&htt->rx_ring.lock);
1985
1986         if (htt->rx_confused)
1987                 return;
1988
1989         skb_pull(skb, sizeof(resp->hdr));
1990         skb_pull(skb, sizeof(resp->rx_in_ord_ind));
1991
1992         peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
1993         msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
1994         vdev_id = resp->rx_in_ord_ind.vdev_id;
1995         tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
1996         offload = !!(resp->rx_in_ord_ind.info &
1997                         HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
1998         frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
1999
2000         ath10k_dbg(ar, ATH10K_DBG_HTT,
2001                    "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
2002                    vdev_id, peer_id, tid, offload, frag, msdu_count);
2003
2004         if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs)) {
2005                 ath10k_warn(ar, "dropping invalid in order rx indication\n");
2006                 return;
2007         }
2008
2009         /* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
2010          * extracted and processed.
2011          */
2012         __skb_queue_head_init(&list);
2013         ret = ath10k_htt_rx_pop_paddr_list(htt, &resp->rx_in_ord_ind, &list);
2014         if (ret < 0) {
2015                 ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
2016                 htt->rx_confused = true;
2017                 return;
2018         }
2019
2020         /* Offloaded frames are very different and need to be handled
2021          * separately.
2022          */
2023         if (offload)
2024                 ath10k_htt_rx_h_rx_offload(ar, &list);
2025
2026         while (!skb_queue_empty(&list)) {
2027                 __skb_queue_head_init(&amsdu);
2028                 ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
2029                 switch (ret) {
2030                 case 0:
2031                         /* Note: The in-order indication may report interleaved
2032                          * frames from different PPDUs meaning reported rx rate
2033                          * to mac80211 isn't accurate/reliable. It's still
2034                          * better to report something than nothing though. This
2035                          * should still give an idea about rx rate to the user.
2036                          */
2037                         ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
2038                         ath10k_htt_rx_h_filter(ar, &amsdu, status);
2039                         ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false);
2040                         ath10k_htt_rx_h_deliver(ar, &amsdu, status);
2041                         break;
2042                 case -EAGAIN:
2043                         /* fall through */
2044                 default:
2045                         /* Should not happen. */
2046                         ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
2047                         htt->rx_confused = true;
2048                         __skb_queue_purge(&list);
2049                         return;
2050                 }
2051         }
2052
2053         tasklet_schedule(&htt->rx_replenish_task);
2054 }
2055
2056 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
2057 {
2058         struct ath10k_htt *htt = &ar->htt;
2059         struct htt_resp *resp = (struct htt_resp *)skb->data;
2060         enum htt_t2h_msg_type type;
2061
2062         /* confirm alignment */
2063         if (!IS_ALIGNED((unsigned long)skb->data, 4))
2064                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
2065
2066         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
2067                    resp->hdr.msg_type);
2068
2069         if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
2070                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
2071                            resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
2072                 dev_kfree_skb_any(skb);
2073                 return;
2074         }
2075         type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
2076
2077         switch (type) {
2078         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
2079                 htt->target_version_major = resp->ver_resp.major;
2080                 htt->target_version_minor = resp->ver_resp.minor;
2081                 complete(&htt->target_version_received);
2082                 break;
2083         }
2084         case HTT_T2H_MSG_TYPE_RX_IND:
2085                 spin_lock_bh(&htt->rx_ring.lock);
2086                 __skb_queue_tail(&htt->rx_compl_q, skb);
2087                 spin_unlock_bh(&htt->rx_ring.lock);
2088                 tasklet_schedule(&htt->txrx_compl_task);
2089                 return;
2090         case HTT_T2H_MSG_TYPE_PEER_MAP: {
2091                 struct htt_peer_map_event ev = {
2092                         .vdev_id = resp->peer_map.vdev_id,
2093                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
2094                 };
2095                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
2096                 ath10k_peer_map_event(htt, &ev);
2097                 break;
2098         }
2099         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
2100                 struct htt_peer_unmap_event ev = {
2101                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
2102                 };
2103                 ath10k_peer_unmap_event(htt, &ev);
2104                 break;
2105         }
2106         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
2107                 struct htt_tx_done tx_done = {};
2108                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
2109
2110                 tx_done.msdu_id =
2111                         __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
2112
2113                 switch (status) {
2114                 case HTT_MGMT_TX_STATUS_OK:
2115                         tx_done.success = true;
2116                         break;
2117                 case HTT_MGMT_TX_STATUS_RETRY:
2118                         tx_done.no_ack = true;
2119                         break;
2120                 case HTT_MGMT_TX_STATUS_DROP:
2121                         tx_done.discard = true;
2122                         break;
2123                 }
2124
2125                 ath10k_txrx_tx_unref(htt, &tx_done);
2126                 break;
2127         }
2128         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
2129                 skb_queue_tail(&htt->tx_compl_q, skb);
2130                 tasklet_schedule(&htt->txrx_compl_task);
2131                 return;
2132         case HTT_T2H_MSG_TYPE_SEC_IND: {
2133                 struct ath10k *ar = htt->ar;
2134                 struct htt_security_indication *ev = &resp->security_indication;
2135
2136                 ath10k_dbg(ar, ATH10K_DBG_HTT,
2137                            "sec ind peer_id %d unicast %d type %d\n",
2138                           __le16_to_cpu(ev->peer_id),
2139                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
2140                           MS(ev->flags, HTT_SECURITY_TYPE));
2141                 complete(&ar->install_key_done);
2142                 break;
2143         }
2144         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
2145                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2146                                 skb->data, skb->len);
2147                 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
2148                 break;
2149         }
2150         case HTT_T2H_MSG_TYPE_TEST:
2151                 break;
2152         case HTT_T2H_MSG_TYPE_STATS_CONF:
2153                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
2154                 break;
2155         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
2156                 /* Firmware can return tx frames if it's unable to fully
2157                  * process them and suspects host may be able to fix it. ath10k
2158                  * sends all tx frames as already inspected so this shouldn't
2159                  * happen unless fw has a bug.
2160                  */
2161                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
2162                 break;
2163         case HTT_T2H_MSG_TYPE_RX_ADDBA:
2164                 ath10k_htt_rx_addba(ar, resp);
2165                 break;
2166         case HTT_T2H_MSG_TYPE_RX_DELBA:
2167                 ath10k_htt_rx_delba(ar, resp);
2168                 break;
2169         case HTT_T2H_MSG_TYPE_PKTLOG: {
2170                 struct ath10k_pktlog_hdr *hdr =
2171                         (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;
2172
2173                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
2174                                         sizeof(*hdr) +
2175                                         __le16_to_cpu(hdr->size));
2176                 break;
2177         }
2178         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
2179                 /* Ignore this event because mac80211 takes care of Rx
2180                  * aggregation reordering.
2181                  */
2182                 break;
2183         }
2184         case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
2185                 spin_lock_bh(&htt->rx_ring.lock);
2186                 __skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
2187                 spin_unlock_bh(&htt->rx_ring.lock);
2188                 tasklet_schedule(&htt->txrx_compl_task);
2189                 return;
2190         }
2191         case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
2192                 break;
2193         case HTT_T2H_MSG_TYPE_CHAN_CHANGE:
2194                 break;
2195         case HTT_T2H_MSG_TYPE_AGGR_CONF:
2196                 break;
2197         case HTT_T2H_MSG_TYPE_EN_STATS:
2198         case HTT_T2H_MSG_TYPE_TX_FETCH_IND:
2199         case HTT_T2H_MSG_TYPE_TX_FETCH_CONF:
2200         case HTT_T2H_MSG_TYPE_TX_LOW_LATENCY_IND:
2201         default:
2202                 ath10k_warn(ar, "htt event (%d) not handled\n",
2203                             resp->hdr.msg_type);
2204                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2205                                 skb->data, skb->len);
2206                 break;
2207         };
2208
2209         /* Free the indication buffer */
2210         dev_kfree_skb_any(skb);
2211 }
2212 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
2213
2214 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
2215 {
2216         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
2217         struct ath10k *ar = htt->ar;
2218         struct htt_resp *resp;
2219         struct sk_buff *skb;
2220
2221         while ((skb = skb_dequeue(&htt->tx_compl_q))) {
2222                 ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
2223                 dev_kfree_skb_any(skb);
2224         }
2225
2226         spin_lock_bh(&htt->rx_ring.lock);
2227         while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
2228                 resp = (struct htt_resp *)skb->data;
2229                 ath10k_htt_rx_handler(htt, &resp->rx_ind);
2230                 dev_kfree_skb_any(skb);
2231         }
2232
2233         while ((skb = __skb_dequeue(&htt->rx_in_ord_compl_q))) {
2234                 ath10k_htt_rx_in_ord_ind(ar, skb);
2235                 dev_kfree_skb_any(skb);
2236         }
2237         spin_unlock_bh(&htt->rx_ring.lock);
2238 }