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 /* slightly larger than one large A-MPDU */
  29 #define HTT_RX_RING_SIZE_MIN 128
  30
  31 /* roughly 20 ms @ 1 Gbps of 1500B MSDUs */
  32 #define HTT_RX_RING_SIZE_MAX 2048
  33
  34 #define HTT_RX_AVG_FRM_BYTES 1000
  35
  36 /* ms, very conservative */
  37 #define HTT_RX_HOST_LATENCY_MAX_MS 20
  38
  39 /* ms, conservative */
  40 #define HTT_RX_HOST_LATENCY_WORST_LIKELY_MS 10
  41
  42 /* when under memory pressure rx ring refill may fail and needs a retry */
  43 #define HTT_RX_RING_REFILL_RETRY_MS 50
  44
  45 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
  46 static void ath10k_htt_txrx_compl_task(unsigned long ptr);
  47
  48 static int ath10k_htt_rx_ring_size(struct ath10k_htt *htt)
  49 {
  50         int size;
  51
  52         /*
  53          * It is expected that the host CPU will typically be able to
  54          * service the rx indication from one A-MPDU before the rx
  55          * indication from the subsequent A-MPDU happens, roughly 1-2 ms
  56          * later. However, the rx ring should be sized very conservatively,
  57          * to accomodate the worst reasonable delay before the host CPU
  58          * services a rx indication interrupt.
  59          *
  60          * The rx ring need not be kept full of empty buffers. In theory,
  61          * the htt host SW can dynamically track the low-water mark in the
  62          * rx ring, and dynamically adjust the level to which the rx ring
  63          * is filled with empty buffers, to dynamically meet the desired
  64          * low-water mark.
  65          *
  66          * In contrast, it's difficult to resize the rx ring itself, once
  67          * it's in use. Thus, the ring itself should be sized very
  68          * conservatively, while the degree to which the ring is filled
  69          * with empty buffers should be sized moderately conservatively.
  70          */
  71
  72         /* 1e6 bps/mbps / 1e3 ms per sec = 1000 */
  73         size =
  74             htt->max_throughput_mbps +
  75             1000  /
  76             (8 * HTT_RX_AVG_FRM_BYTES) * HTT_RX_HOST_LATENCY_MAX_MS;
  77
  78         if (size < HTT_RX_RING_SIZE_MIN)
  79                 size = HTT_RX_RING_SIZE_MIN;
  80
  81         if (size > HTT_RX_RING_SIZE_MAX)
  82                 size = HTT_RX_RING_SIZE_MAX;
  83
  84         size = roundup_pow_of_two(size);
  85
  86         return size;
  87 }
  88
  89 static int ath10k_htt_rx_ring_fill_level(struct ath10k_htt *htt)
  90 {
  91         int size;
  92
  93         /* 1e6 bps/mbps / 1e3 ms per sec = 1000 */
  94         size =
  95             htt->max_throughput_mbps *
  96             1000  /
  97             (8 * HTT_RX_AVG_FRM_BYTES) * HTT_RX_HOST_LATENCY_WORST_LIKELY_MS;
  98
  99         /*
 100          * Make sure the fill level is at least 1 less than the ring size.
 101          * Leaving 1 element empty allows the SW to easily distinguish
 102          * between a full ring vs. an empty ring.
 103          */
 104         if (size >= htt->rx_ring.size)
 105                 size = htt->rx_ring.size - 1;
 106
 107         return size;
 108 }
 109
 110 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
 111 {
 112         struct sk_buff *skb;
 113         struct ath10k_skb_cb *cb;
 114         int i;
 115
 116         for (i = 0; i < htt->rx_ring.fill_cnt; i++) {
 117                 skb = htt->rx_ring.netbufs_ring[i];
 118                 cb = ATH10K_SKB_CB(skb);
 119                 dma_unmap_single(htt->ar->dev, cb->paddr,
 120                                  skb->len + skb_tailroom(skb),
 121                                  DMA_FROM_DEVICE);
 122                 dev_kfree_skb_any(skb);
 123         }
 124
 125         htt->rx_ring.fill_cnt = 0;
 126 }
 127
 128 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 129 {
 130         struct htt_rx_desc *rx_desc;
 131         struct sk_buff *skb;
 132         dma_addr_t paddr;
 133         int ret = 0, idx;
 134
 135         idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
 136         while (num > 0) {
 137                 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
 138                 if (!skb) {
 139                         ret = -ENOMEM;
 140                         goto fail;
 141                 }
 142
 143                 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
 144                         skb_pull(skb,
 145                                  PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
 146                                  skb->data);
 147
 148                 /* Clear rx_desc attention word before posting to Rx ring */
 149                 rx_desc = (struct htt_rx_desc *)skb->data;
 150                 rx_desc->attention.flags = __cpu_to_le32(0);
 151
 152                 paddr = dma_map_single(htt->ar->dev, skb->data,
 153                                        skb->len + skb_tailroom(skb),
 154                                        DMA_FROM_DEVICE);
 155
 156                 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
 157                         dev_kfree_skb_any(skb);
 158                         ret = -ENOMEM;
 159                         goto fail;
 160                 }
 161
 162                 ATH10K_SKB_CB(skb)->paddr = paddr;
 163                 htt->rx_ring.netbufs_ring[idx] = skb;
 164                 htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
 165                 htt->rx_ring.fill_cnt++;
 166
 167                 num--;
 168                 idx++;
 169                 idx &= htt->rx_ring.size_mask;
 170         }
 171
 172 fail:
 173         *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
 174         return ret;
 175 }
 176
 177 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 178 {
 179         lockdep_assert_held(&htt->rx_ring.lock);
 180         return __ath10k_htt_rx_ring_fill_n(htt, num);
 181 }
 182
 183 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
 184 {
 185         int ret, num_deficit, num_to_fill;
 186
 187         /* Refilling the whole RX ring buffer proves to be a bad idea. The
 188          * reason is RX may take up significant amount of CPU cycles and starve
 189          * other tasks, e.g. TX on an ethernet device while acting as a bridge
 190          * with ath10k wlan interface. This ended up with very poor performance
 191          * once CPU the host system was overwhelmed with RX on ath10k.
 192          *
 193          * By limiting the number of refills the replenishing occurs
 194          * progressively. This in turns makes use of the fact tasklets are
 195          * processed in FIFO order. This means actual RX processing can starve
 196          * out refilling. If there's not enough buffers on RX ring FW will not
 197          * report RX until it is refilled with enough buffers. This
 198          * automatically balances load wrt to CPU power.
 199          *
 200          * This probably comes at a cost of lower maximum throughput but
 201          * improves the avarage and stability. */
 202         spin_lock_bh(&htt->rx_ring.lock);
 203         num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
 204         num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
 205         num_deficit -= num_to_fill;
 206         ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
 207         if (ret == -ENOMEM) {
 208                 /*
 209                  * Failed to fill it to the desired level -
 210                  * we'll start a timer and try again next time.
 211                  * As long as enough buffers are left in the ring for
 212                  * another A-MPDU rx, no special recovery is needed.
 213                  */
 214                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 215                           msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
 216         } else if (num_deficit > 0) {
 217                 tasklet_schedule(&htt->rx_replenish_task);
 218         }
 219         spin_unlock_bh(&htt->rx_ring.lock);
 220 }
 221
 222 static void ath10k_htt_rx_ring_refill_retry(unsigned long arg)
 223 {
 224         struct ath10k_htt *htt = (struct ath10k_htt *)arg;
 225
 226         ath10k_htt_rx_msdu_buff_replenish(htt);
 227 }
 228
 229 static void ath10k_htt_rx_ring_clean_up(struct ath10k_htt *htt)
 230 {
 231         struct sk_buff *skb;
 232         int i;
 233
 234         for (i = 0; i < htt->rx_ring.size; i++) {
 235                 skb = htt->rx_ring.netbufs_ring[i];
 236                 if (!skb)
 237                         continue;
 238
 239                 dma_unmap_single(htt->ar->dev, ATH10K_SKB_CB(skb)->paddr,
 240                                  skb->len + skb_tailroom(skb),
 241                                  DMA_FROM_DEVICE);
 242                 dev_kfree_skb_any(skb);
 243                 htt->rx_ring.netbufs_ring[i] = NULL;
 244         }
 245 }
 246
 247 void ath10k_htt_rx_free(struct ath10k_htt *htt)
 248 {
 249         del_timer_sync(&htt->rx_ring.refill_retry_timer);
 250         tasklet_kill(&htt->rx_replenish_task);
 251         tasklet_kill(&htt->txrx_compl_task);
 252
 253         skb_queue_purge(&htt->tx_compl_q);
 254         skb_queue_purge(&htt->rx_compl_q);
 255
 256         ath10k_htt_rx_ring_clean_up(htt);
 257
 258         dma_free_coherent(htt->ar->dev,
 259                           (htt->rx_ring.size *
 260                            sizeof(htt->rx_ring.paddrs_ring)),
 261                           htt->rx_ring.paddrs_ring,
 262                           htt->rx_ring.base_paddr);
 263
 264         dma_free_coherent(htt->ar->dev,
 265                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 266                           htt->rx_ring.alloc_idx.vaddr,
 267                           htt->rx_ring.alloc_idx.paddr);
 268
 269         kfree(htt->rx_ring.netbufs_ring);
 270 }
 271
 272 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 273 {
 274         struct ath10k *ar = htt->ar;
 275         int idx;
 276         struct sk_buff *msdu;
 277
 278         lockdep_assert_held(&htt->rx_ring.lock);
 279
 280         if (htt->rx_ring.fill_cnt == 0) {
 281                 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
 282                 return NULL;
 283         }
 284
 285         idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 286         msdu = htt->rx_ring.netbufs_ring[idx];
 287         htt->rx_ring.netbufs_ring[idx] = NULL;
 288
 289         idx++;
 290         idx &= htt->rx_ring.size_mask;
 291         htt->rx_ring.sw_rd_idx.msdu_payld = idx;
 292         htt->rx_ring.fill_cnt--;
 293
 294         return msdu;
 295 }
 296
 297 static void ath10k_htt_rx_free_msdu_chain(struct sk_buff *skb)
 298 {
 299         struct sk_buff *next;
 300
 301         while (skb) {
 302                 next = skb->next;
 303                 dev_kfree_skb_any(skb);
 304                 skb = next;
 305         }
 306 }
 307
 308 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 309 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 310                                    u8 **fw_desc, int *fw_desc_len,
 311                                    struct sk_buff **head_msdu,
 312                                    struct sk_buff **tail_msdu,
 313                                    u32 *attention)
 314 {
 315         struct ath10k *ar = htt->ar;
 316         int msdu_len, msdu_chaining = 0;
 317         struct sk_buff *msdu, *next;
 318         struct htt_rx_desc *rx_desc;
 319
 320         lockdep_assert_held(&htt->rx_ring.lock);
 321
 322         if (htt->rx_confused) {
 323                 ath10k_warn(ar, "htt is confused. refusing rx\n");
 324                 return -1;
 325         }
 326
 327         msdu = *head_msdu = ath10k_htt_rx_netbuf_pop(htt);
 328         while (msdu) {
 329                 int last_msdu, msdu_len_invalid, msdu_chained;
 330
 331                 dma_unmap_single(htt->ar->dev,
 332                                  ATH10K_SKB_CB(msdu)->paddr,
 333                                  msdu->len + skb_tailroom(msdu),
 334                                  DMA_FROM_DEVICE);
 335
 336                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx pop: ",
 337                                 msdu->data, msdu->len + skb_tailroom(msdu));
 338
 339                 rx_desc = (struct htt_rx_desc *)msdu->data;
 340
 341                 /* FIXME: we must report msdu payload since this is what caller
 342                  *        expects now */
 343                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 344                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 345
 346                 /*
 347                  * Sanity check - confirm the HW is finished filling in the
 348                  * rx data.
 349                  * If the HW and SW are working correctly, then it's guaranteed
 350                  * that the HW's MAC DMA is done before this point in the SW.
 351                  * To prevent the case that we handle a stale Rx descriptor,
 352                  * just assert for now until we have a way to recover.
 353                  */
 354                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 355                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 356                         ath10k_htt_rx_free_msdu_chain(*head_msdu);
 357                         *head_msdu = NULL;
 358                         msdu = NULL;
 359                         ath10k_err(ar, "htt rx stopped. cannot recover\n");
 360                         htt->rx_confused = true;
 361                         break;
 362                 }
 363
 364                 *attention |= __le32_to_cpu(rx_desc->attention.flags) &
 365                                             (RX_ATTENTION_FLAGS_TKIP_MIC_ERR |
 366                                              RX_ATTENTION_FLAGS_DECRYPT_ERR |
 367                                              RX_ATTENTION_FLAGS_FCS_ERR |
 368                                              RX_ATTENTION_FLAGS_MGMT_TYPE);
 369                 /*
 370                  * Copy the FW rx descriptor for this MSDU from the rx
 371                  * indication message into the MSDU's netbuf. HL uses the
 372                  * same rx indication message definition as LL, and simply
 373                  * appends new info (fields from the HW rx desc, and the
 374                  * MSDU payload itself). So, the offset into the rx
 375                  * indication message only has to account for the standard
 376                  * offset of the per-MSDU FW rx desc info within the
 377                  * message, and how many bytes of the per-MSDU FW rx desc
 378                  * info have already been consumed. (And the endianness of
 379                  * the host, since for a big-endian host, the rx ind
 380                  * message contents, including the per-MSDU rx desc bytes,
 381                  * were byteswapped during upload.)
 382                  */
 383                 if (*fw_desc_len > 0) {
 384                         rx_desc->fw_desc.info0 = **fw_desc;
 385                         /*
 386                          * The target is expected to only provide the basic
 387                          * per-MSDU rx descriptors. Just to be sure, verify
 388                          * that the target has not attached extension data
 389                          * (e.g. LRO flow ID).
 390                          */
 391
 392                         /* or more, if there's extension data */
 393                         (*fw_desc)++;
 394                         (*fw_desc_len)--;
 395                 } else {
 396                         /*
 397                          * When an oversized AMSDU happened, FW will lost
 398                          * some of MSDU status - in this case, the FW
 399                          * descriptors provided will be less than the
 400                          * actual MSDUs inside this MPDU. Mark the FW
 401                          * descriptors so that it will still deliver to
 402                          * upper stack, if no CRC error for this MPDU.
 403                          *
 404                          * FIX THIS - the FW descriptors are actually for
 405                          * MSDUs in the end of this A-MSDU instead of the
 406                          * beginning.
 407                          */
 408                         rx_desc->fw_desc.info0 = 0;
 409                 }
 410
 411                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 412                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 413                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 414                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0),
 415                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 416                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 417
 418                 if (msdu_len_invalid)
 419                         msdu_len = 0;
 420
 421                 skb_trim(msdu, 0);
 422                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 423                 msdu_len -= msdu->len;
 424
 425                 /* FIXME: Do chained buffers include htt_rx_desc or not? */
 426                 while (msdu_chained--) {
 427                         struct sk_buff *next = ath10k_htt_rx_netbuf_pop(htt);
 428
 429                         dma_unmap_single(htt->ar->dev,
 430                                          ATH10K_SKB_CB(next)->paddr,
 431                                          next->len + skb_tailroom(next),
 432                                          DMA_FROM_DEVICE);
 433
 434                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
 435                                         "htt rx chained: ", next->data,
 436                                         next->len + skb_tailroom(next));
 437
 438                         skb_trim(next, 0);
 439                         skb_put(next, min(msdu_len, HTT_RX_BUF_SIZE));
 440                         msdu_len -= next->len;
 441
 442                         msdu->next = next;
 443                         msdu = next;
 444                         msdu_chaining = 1;
 445                 }
 446
 447                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) &
 448                                 RX_MSDU_END_INFO0_LAST_MSDU;
 449
 450                 if (last_msdu) {
 451                         msdu->next = NULL;
 452                         break;
 453                 }
 454
 455                 next = ath10k_htt_rx_netbuf_pop(htt);
 456                 msdu->next = next;
 457                 msdu = next;
 458         }
 459         *tail_msdu = msdu;
 460
 461         if (*head_msdu == NULL)
 462                 msdu_chaining = -1;
 463
 464         /*
 465          * Don't refill the ring yet.
 466          *
 467          * First, the elements popped here are still in use - it is not
 468          * safe to overwrite them until the matching call to
 469          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 470          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 471          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 472          * (something like 3 buffers). Consequently, we'll rely on the txrx
 473          * SW to tell us when it is done pulling all the PPDU's rx buffers
 474          * out of the rx ring, and then refill it just once.
 475          */
 476
 477         return msdu_chaining;
 478 }
 479
 480 static void ath10k_htt_rx_replenish_task(unsigned long ptr)
 481 {
 482         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
 483
 484         ath10k_htt_rx_msdu_buff_replenish(htt);
 485 }
 486
 487 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 488 {
 489         struct ath10k *ar = htt->ar;
 490         dma_addr_t paddr;
 491         void *vaddr;
 492         size_t size;
 493         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 494
 495         htt->rx_ring.size = ath10k_htt_rx_ring_size(htt);
 496         if (!is_power_of_2(htt->rx_ring.size)) {
 497                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 498                 return -EINVAL;
 499         }
 500
 501         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 502
 503         /*
 504          * Set the initial value for the level to which the rx ring
 505          * should be filled, based on the max throughput and the
 506          * worst likely latency for the host to fill the rx ring
 507          * with new buffers. In theory, this fill level can be
 508          * dynamically adjusted from the initial value set here, to
 509          * reflect the actual host latency rather than a
 510          * conservative assumption about the host latency.
 511          */
 512         htt->rx_ring.fill_level = ath10k_htt_rx_ring_fill_level(htt);
 513
 514         htt->rx_ring.netbufs_ring =
 515                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 516                         GFP_KERNEL);
 517         if (!htt->rx_ring.netbufs_ring)
 518                 goto err_netbuf;
 519
 520         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 521
 522         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
 523         if (!vaddr)
 524                 goto err_dma_ring;
 525
 526         htt->rx_ring.paddrs_ring = vaddr;
 527         htt->rx_ring.base_paddr = paddr;
 528
 529         vaddr = dma_alloc_coherent(htt->ar->dev,
 530                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 531                                    &paddr, GFP_DMA);
 532         if (!vaddr)
 533                 goto err_dma_idx;
 534
 535         htt->rx_ring.alloc_idx.vaddr = vaddr;
 536         htt->rx_ring.alloc_idx.paddr = paddr;
 537         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 538         *htt->rx_ring.alloc_idx.vaddr = 0;
 539
 540         /* Initialize the Rx refill retry timer */
 541         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 542
 543         spin_lock_init(&htt->rx_ring.lock);
 544
 545         htt->rx_ring.fill_cnt = 0;
 546         if (__ath10k_htt_rx_ring_fill_n(htt, htt->rx_ring.fill_level))
 547                 goto err_fill_ring;
 548
 549         tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
 550                      (unsigned long)htt);
 551
 552         skb_queue_head_init(&htt->tx_compl_q);
 553         skb_queue_head_init(&htt->rx_compl_q);
 554
 555         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 556                      (unsigned long)htt);
 557
 558         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 559                    htt->rx_ring.size, htt->rx_ring.fill_level);
 560         return 0;
 561
 562 err_fill_ring:
 563         ath10k_htt_rx_ring_free(htt);
 564         dma_free_coherent(htt->ar->dev,
 565                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 566                           htt->rx_ring.alloc_idx.vaddr,
 567                           htt->rx_ring.alloc_idx.paddr);
 568 err_dma_idx:
 569         dma_free_coherent(htt->ar->dev,
 570                           (htt->rx_ring.size *
 571                            sizeof(htt->rx_ring.paddrs_ring)),
 572                           htt->rx_ring.paddrs_ring,
 573                           htt->rx_ring.base_paddr);
 574 err_dma_ring:
 575         kfree(htt->rx_ring.netbufs_ring);
 576 err_netbuf:
 577         return -ENOMEM;
 578 }
 579
 580 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 581                                           enum htt_rx_mpdu_encrypt_type type)
 582 {
 583         switch (type) {
 584         case HTT_RX_MPDU_ENCRYPT_WEP40:
 585         case HTT_RX_MPDU_ENCRYPT_WEP104:
 586                 return 4;
 587         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 588         case HTT_RX_MPDU_ENCRYPT_WEP128: /* not tested */
 589         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 590         case HTT_RX_MPDU_ENCRYPT_WAPI: /* not tested */
 591         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 592                 return 8;
 593         case HTT_RX_MPDU_ENCRYPT_NONE:
 594                 return 0;
 595         }
 596
 597         ath10k_warn(ar, "unknown encryption type %d\n", type);
 598         return 0;
 599 }
 600
 601 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 602                                          enum htt_rx_mpdu_encrypt_type type)
 603 {
 604         switch (type) {
 605         case HTT_RX_MPDU_ENCRYPT_NONE:
 606         case HTT_RX_MPDU_ENCRYPT_WEP40:
 607         case HTT_RX_MPDU_ENCRYPT_WEP104:
 608         case HTT_RX_MPDU_ENCRYPT_WEP128:
 609         case HTT_RX_MPDU_ENCRYPT_WAPI:
 610                 return 0;
 611         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 612         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 613                 return 4;
 614         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 615                 return 8;
 616         }
 617
 618         ath10k_warn(ar, "unknown encryption type %d\n", type);
 619         return 0;
 620 }
 621
 622 /* Applies for first msdu in chain, before altering it. */
 623 static struct ieee80211_hdr *ath10k_htt_rx_skb_get_hdr(struct sk_buff *skb)
 624 {
 625         struct htt_rx_desc *rxd;
 626         enum rx_msdu_decap_format fmt;
 627
 628         rxd = (void *)skb->data - sizeof(*rxd);
 629         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 630                  RX_MSDU_START_INFO1_DECAP_FORMAT);
 631
 632         if (fmt == RX_MSDU_DECAP_RAW)
 633                 return (void *)skb->data;
 634
 635         return (void *)skb->data - RX_HTT_HDR_STATUS_LEN;
 636 }
 637
 638 /* This function only applies for first msdu in an msdu chain */
 639 static bool ath10k_htt_rx_hdr_is_amsdu(struct ieee80211_hdr *hdr)
 640 {
 641         u8 *qc;
 642
 643         if (ieee80211_is_data_qos(hdr->frame_control)) {
 644                 qc = ieee80211_get_qos_ctl(hdr);
 645                 if (qc[0] & 0x80)
 646                         return true;
 647         }
 648         return false;
 649 }
 650
 651 struct rfc1042_hdr {
 652         u8 llc_dsap;
 653         u8 llc_ssap;
 654         u8 llc_ctrl;
 655         u8 snap_oui[3];
 656         __be16 snap_type;
 657 } __packed;
 658
 659 struct amsdu_subframe_hdr {
 660         u8 dst[ETH_ALEN];
 661         u8 src[ETH_ALEN];
 662         __be16 len;
 663 } __packed;
 664
 665 static const u8 rx_legacy_rate_idx[] = {
 666         3,      /* 0x00  - 11Mbps  */
 667         2,      /* 0x01  - 5.5Mbps */
 668         1,      /* 0x02  - 2Mbps   */
 669         0,      /* 0x03  - 1Mbps   */
 670         3,      /* 0x04  - 11Mbps  */
 671         2,      /* 0x05  - 5.5Mbps */
 672         1,      /* 0x06  - 2Mbps   */
 673         0,      /* 0x07  - 1Mbps   */
 674         10,     /* 0x08  - 48Mbps  */
 675         8,      /* 0x09  - 24Mbps  */
 676         6,      /* 0x0A  - 12Mbps  */
 677         4,      /* 0x0B  - 6Mbps   */
 678         11,     /* 0x0C  - 54Mbps  */
 679         9,      /* 0x0D  - 36Mbps  */
 680         7,      /* 0x0E  - 18Mbps  */
 681         5,      /* 0x0F  - 9Mbps   */
 682 };
 683
 684 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 685                                   enum ieee80211_band band,
 686                                   u8 info0, u32 info1, u32 info2,
 687                                   struct ieee80211_rx_status *status)
 688 {
 689         u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
 690         u8 preamble = 0;
 691
 692         /* Check if valid fields */
 693         if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
 694                 return;
 695
 696         preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
 697
 698         switch (preamble) {
 699         case HTT_RX_LEGACY:
 700                 cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
 701                 rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
 702                 rate_idx = 0;
 703
 704                 if (rate < 0x08 || rate > 0x0F)
 705                         break;
 706
 707                 switch (band) {
 708                 case IEEE80211_BAND_2GHZ:
 709                         if (cck)
 710                                 rate &= ~BIT(3);
 711                         rate_idx = rx_legacy_rate_idx[rate];
 712                         break;
 713                 case IEEE80211_BAND_5GHZ:
 714                         rate_idx = rx_legacy_rate_idx[rate];
 715                         /* We are using same rate table registering
 716                            HW - ath10k_rates[]. In case of 5GHz skip
 717                            CCK rates, so -4 here */
 718                         rate_idx -= 4;
 719                         break;
 720                 default:
 721                         break;
 722                 }
 723
 724                 status->rate_idx = rate_idx;
 725                 break;
 726         case HTT_RX_HT:
 727         case HTT_RX_HT_WITH_TXBF:
 728                 /* HT-SIG - Table 20-11 in info1 and info2 */
 729                 mcs = info1 & 0x1F;
 730                 nss = mcs >> 3;
 731                 bw = (info1 >> 7) & 1;
 732                 sgi = (info2 >> 7) & 1;
 733
 734                 status->rate_idx = mcs;
 735                 status->flag |= RX_FLAG_HT;
 736                 if (sgi)
 737                         status->flag |= RX_FLAG_SHORT_GI;
 738                 if (bw)
 739                         status->flag |= RX_FLAG_40MHZ;
 740                 break;
 741         case HTT_RX_VHT:
 742         case HTT_RX_VHT_WITH_TXBF:
 743                 /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
 744                    TODO check this */
 745                 mcs = (info2 >> 4) & 0x0F;
 746                 nss = ((info1 >> 10) & 0x07) + 1;
 747                 bw = info1 & 3;
 748                 sgi = info2 & 1;
 749
 750                 status->rate_idx = mcs;
 751                 status->vht_nss = nss;
 752
 753                 if (sgi)
 754                         status->flag |= RX_FLAG_SHORT_GI;
 755
 756                 switch (bw) {
 757                 /* 20MHZ */
 758                 case 0:
 759                         break;
 760                 /* 40MHZ */
 761                 case 1:
 762                         status->flag |= RX_FLAG_40MHZ;
 763                         break;
 764                 /* 80MHZ */
 765                 case 2:
 766                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 767                 }
 768
 769                 status->flag |= RX_FLAG_VHT;
 770                 break;
 771         default:
 772                 break;
 773         }
 774 }
 775
 776 static void ath10k_htt_rx_h_protected(struct ath10k_htt *htt,
 777                                       struct ieee80211_rx_status *rx_status,
 778                                       struct sk_buff *skb,
 779                                       enum htt_rx_mpdu_encrypt_type enctype,
 780                                       enum rx_msdu_decap_format fmt,
 781                                       bool dot11frag)
 782 {
 783         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 784
 785         rx_status->flag &= ~(RX_FLAG_DECRYPTED |
 786                              RX_FLAG_IV_STRIPPED |
 787                              RX_FLAG_MMIC_STRIPPED);
 788
 789         if (enctype == HTT_RX_MPDU_ENCRYPT_NONE)
 790                 return;
 791
 792         /*
 793          * There's no explicit rx descriptor flag to indicate whether a given
 794          * frame has been decrypted or not. We're forced to use the decap
 795          * format as an implicit indication. However fragmentation rx is always
 796          * raw and it probably never reports undecrypted raws.
 797          *
 798          * This makes sure sniffed frames are reported as-is without stripping
 799          * the protected flag.
 800          */
 801         if (fmt == RX_MSDU_DECAP_RAW && !dot11frag)
 802                 return;
 803
 804         rx_status->flag |= RX_FLAG_DECRYPTED |
 805                            RX_FLAG_IV_STRIPPED |
 806                            RX_FLAG_MMIC_STRIPPED;
 807         hdr->frame_control = __cpu_to_le16(__le16_to_cpu(hdr->frame_control) &
 808                                            ~IEEE80211_FCTL_PROTECTED);
 809 }
 810
 811 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 812                                     struct ieee80211_rx_status *status)
 813 {
 814         struct ieee80211_channel *ch;
 815
 816         spin_lock_bh(&ar->data_lock);
 817         ch = ar->scan_channel;
 818         if (!ch)
 819                 ch = ar->rx_channel;
 820         spin_unlock_bh(&ar->data_lock);
 821
 822         if (!ch)
 823                 return false;
 824
 825         status->band = ch->band;
 826         status->freq = ch->center_freq;
 827
 828         return true;
 829 }
 830
 831 static const char * const tid_to_ac[] = {
 832         "BE",
 833         "BK",
 834         "BK",
 835         "BE",
 836         "VI",
 837         "VI",
 838         "VO",
 839         "VO",
 840 };
 841
 842 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 843 {
 844         u8 *qc;
 845         int tid;
 846
 847         if (!ieee80211_is_data_qos(hdr->frame_control))
 848                 return "";
 849
 850         qc = ieee80211_get_qos_ctl(hdr);
 851         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 852         if (tid < 8)
 853                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 854         else
 855                 snprintf(out, size, "tid %d", tid);
 856
 857         return out;
 858 }
 859
 860 static void ath10k_process_rx(struct ath10k *ar,
 861                               struct ieee80211_rx_status *rx_status,
 862                               struct sk_buff *skb)
 863 {
 864         struct ieee80211_rx_status *status;
 865         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 866         char tid[32];
 867
 868         status = IEEE80211_SKB_RXCB(skb);
 869         *status = *rx_status;
 870
 871         ath10k_dbg(ar, ATH10K_DBG_DATA,
 872                    "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%x fcs-err %i mic-err %i amsdu-more %i\n",
 873                    skb,
 874                    skb->len,
 875                    ieee80211_get_SA(hdr),
 876                    ath10k_get_tid(hdr, tid, sizeof(tid)),
 877                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
 878                                                         "mcast" : "ucast",
 879                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
 880                    status->flag == 0 ? "legacy" : "",
 881                    status->flag & RX_FLAG_HT ? "ht" : "",
 882                    status->flag & RX_FLAG_VHT ? "vht" : "",
 883                    status->flag & RX_FLAG_40MHZ ? "40" : "",
 884                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
 885                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
 886                    status->rate_idx,
 887                    status->vht_nss,
 888                    status->freq,
 889                    status->band, status->flag,
 890                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
 891                    !!(status->flag & RX_FLAG_MMIC_ERROR),
 892                    !!(status->flag & RX_FLAG_AMSDU_MORE));
 893         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
 894                         skb->data, skb->len);
 895
 896         ieee80211_rx(ar->hw, skb);
 897 }
 898
 899 static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr)
 900 {
 901         /* nwifi header is padded to 4 bytes. this fixes 4addr rx */
 902         return round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 903 }
 904
 905 static void ath10k_htt_rx_amsdu(struct ath10k_htt *htt,
 906                                 struct ieee80211_rx_status *rx_status,
 907                                 struct sk_buff *skb_in)
 908 {
 909         struct ath10k *ar = htt->ar;
 910         struct htt_rx_desc *rxd;
 911         struct sk_buff *skb = skb_in;
 912         struct sk_buff *first;
 913         enum rx_msdu_decap_format fmt;
 914         enum htt_rx_mpdu_encrypt_type enctype;
 915         struct ieee80211_hdr *hdr;
 916         u8 hdr_buf[64], da[ETH_ALEN], sa[ETH_ALEN], *qos;
 917         unsigned int hdr_len;
 918
 919         rxd = (void *)skb->data - sizeof(*rxd);
 920         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 921                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
 922
 923         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
 924         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 925         memcpy(hdr_buf, hdr, hdr_len);
 926         hdr = (struct ieee80211_hdr *)hdr_buf;
 927
 928         first = skb;
 929         while (skb) {
 930                 void *decap_hdr;
 931                 int len;
 932
 933                 rxd = (void *)skb->data - sizeof(*rxd);
 934                 fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 935                          RX_MSDU_START_INFO1_DECAP_FORMAT);
 936                 decap_hdr = (void *)rxd->rx_hdr_status;
 937
 938                 skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
 939
 940                 /* First frame in an A-MSDU chain has more decapped data. */
 941                 if (skb == first) {
 942                         len = round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 943                         len += round_up(ath10k_htt_rx_crypto_param_len(ar,
 944                                                 enctype), 4);
 945                         decap_hdr += len;
 946                 }
 947
 948                 switch (fmt) {
 949                 case RX_MSDU_DECAP_RAW:
 950                         /* remove trailing FCS */
 951                         skb_trim(skb, skb->len - FCS_LEN);
 952                         break;
 953                 case RX_MSDU_DECAP_NATIVE_WIFI:
 954                         /* pull decapped header and copy SA & DA */
 955                         hdr = (struct ieee80211_hdr *)skb->data;
 956                         hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
 957                         ether_addr_copy(da, ieee80211_get_DA(hdr));
 958                         ether_addr_copy(sa, ieee80211_get_SA(hdr));
 959                         skb_pull(skb, hdr_len);
 960
 961                         /* push original 802.11 header */
 962                         hdr = (struct ieee80211_hdr *)hdr_buf;
 963                         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 964                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 965
 966                         /* original A-MSDU header has the bit set but we're
 967                          * not including A-MSDU subframe header */
 968                         hdr = (struct ieee80211_hdr *)skb->data;
 969                         qos = ieee80211_get_qos_ctl(hdr);
 970                         qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 971
 972                         /* original 802.11 header has a different DA and in
 973                          * case of 4addr it may also have different SA
 974                          */
 975                         ether_addr_copy(ieee80211_get_DA(hdr), da);
 976                         ether_addr_copy(ieee80211_get_SA(hdr), sa);
 977                         break;
 978                 case RX_MSDU_DECAP_ETHERNET2_DIX:
 979                         /* strip ethernet header and insert decapped 802.11
 980                          * header, amsdu subframe header and rfc1042 header */
 981
 982                         len = 0;
 983                         len += sizeof(struct rfc1042_hdr);
 984                         len += sizeof(struct amsdu_subframe_hdr);
 985
 986                         skb_pull(skb, sizeof(struct ethhdr));
 987                         memcpy(skb_push(skb, len), decap_hdr, len);
 988                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 989                         break;
 990                 case RX_MSDU_DECAP_8023_SNAP_LLC:
 991                         /* insert decapped 802.11 header making a singly
 992                          * A-MSDU */
 993                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 994                         break;
 995                 }
 996
 997                 skb_in = skb;
 998                 ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype, fmt,
 999                                           false);
1000                 skb = skb->next;
1001                 skb_in->next = NULL;
1002
1003                 if (skb)
1004                         rx_status->flag |= RX_FLAG_AMSDU_MORE;
1005                 else
1006                         rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
1007
1008                 ath10k_process_rx(htt->ar, rx_status, skb_in);
1009         }
1010
1011         /* FIXME: It might be nice to re-assemble the A-MSDU when there's a
1012          * monitor interface active for sniffing purposes. */
1013 }
1014
1015 static void ath10k_htt_rx_msdu(struct ath10k_htt *htt,
1016                                struct ieee80211_rx_status *rx_status,
1017                                struct sk_buff *skb)
1018 {
1019         struct ath10k *ar = htt->ar;
1020         struct htt_rx_desc *rxd;
1021         struct ieee80211_hdr *hdr;
1022         enum rx_msdu_decap_format fmt;
1023         enum htt_rx_mpdu_encrypt_type enctype;
1024         int hdr_len;
1025         void *rfc1042;
1026
1027         /* This shouldn't happen. If it does than it may be a FW bug. */
1028         if (skb->next) {
1029                 ath10k_warn(ar, "htt rx received chained non A-MSDU frame\n");
1030                 ath10k_htt_rx_free_msdu_chain(skb->next);
1031                 skb->next = NULL;
1032         }
1033
1034         rxd = (void *)skb->data - sizeof(*rxd);
1035         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1036                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1037         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1038                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1039         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1040         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1041
1042         skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
1043
1044         switch (fmt) {
1045         case RX_MSDU_DECAP_RAW:
1046                 /* remove trailing FCS */
1047                 skb_trim(skb, skb->len - FCS_LEN);
1048                 break;
1049         case RX_MSDU_DECAP_NATIVE_WIFI:
1050                 /* Pull decapped header */
1051                 hdr = (struct ieee80211_hdr *)skb->data;
1052                 hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
1053                 skb_pull(skb, hdr_len);
1054
1055                 /* Push original header */
1056                 hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1057                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1058                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1059                 break;
1060         case RX_MSDU_DECAP_ETHERNET2_DIX:
1061                 /* strip ethernet header and insert decapped 802.11 header and
1062                  * rfc1042 header */
1063
1064                 rfc1042 = hdr;
1065                 rfc1042 += roundup(hdr_len, 4);
1066                 rfc1042 += roundup(ath10k_htt_rx_crypto_param_len(ar,
1067                                         enctype), 4);
1068
1069                 skb_pull(skb, sizeof(struct ethhdr));
1070                 memcpy(skb_push(skb, sizeof(struct rfc1042_hdr)),
1071                        rfc1042, sizeof(struct rfc1042_hdr));
1072                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1073                 break;
1074         case RX_MSDU_DECAP_8023_SNAP_LLC:
1075                 /* remove A-MSDU subframe header and insert
1076                  * decapped 802.11 header. rfc1042 header is already there */
1077
1078                 skb_pull(skb, sizeof(struct amsdu_subframe_hdr));
1079                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1080                 break;
1081         }
1082
1083         ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype, fmt, false);
1084
1085         ath10k_process_rx(htt->ar, rx_status, skb);
1086 }
1087
1088 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1089 {
1090         struct htt_rx_desc *rxd;
1091         u32 flags, info;
1092         bool is_ip4, is_ip6;
1093         bool is_tcp, is_udp;
1094         bool ip_csum_ok, tcpudp_csum_ok;
1095
1096         rxd = (void *)skb->data - sizeof(*rxd);
1097         flags = __le32_to_cpu(rxd->attention.flags);
1098         info = __le32_to_cpu(rxd->msdu_start.info1);
1099
1100         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1101         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1102         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1103         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1104         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1105         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1106
1107         if (!is_ip4 && !is_ip6)
1108                 return CHECKSUM_NONE;
1109         if (!is_tcp && !is_udp)
1110                 return CHECKSUM_NONE;
1111         if (!ip_csum_ok)
1112                 return CHECKSUM_NONE;
1113         if (!tcpudp_csum_ok)
1114                 return CHECKSUM_NONE;
1115
1116         return CHECKSUM_UNNECESSARY;
1117 }
1118
1119 static int ath10k_unchain_msdu(struct sk_buff *msdu_head)
1120 {
1121         struct sk_buff *next = msdu_head->next;
1122         struct sk_buff *to_free = next;
1123         int space;
1124         int total_len = 0;
1125
1126         /* TODO:  Might could optimize this by using
1127          * skb_try_coalesce or similar method to
1128          * decrease copying, or maybe get mac80211 to
1129          * provide a way to just receive a list of
1130          * skb?
1131          */
1132
1133         msdu_head->next = NULL;
1134
1135         /* Allocate total length all at once. */
1136         while (next) {
1137                 total_len += next->len;
1138                 next = next->next;
1139         }
1140
1141         space = total_len - skb_tailroom(msdu_head);
1142         if ((space > 0) &&
1143             (pskb_expand_head(msdu_head, 0, space, GFP_ATOMIC) < 0)) {
1144                 /* TODO:  bump some rx-oom error stat */
1145                 /* put it back together so we can free the
1146                  * whole list at once.
1147                  */
1148                 msdu_head->next = to_free;
1149                 return -1;
1150         }
1151
1152         /* Walk list again, copying contents into
1153          * msdu_head
1154          */
1155         next = to_free;
1156         while (next) {
1157                 skb_copy_from_linear_data(next, skb_put(msdu_head, next->len),
1158                                           next->len);
1159                 next = next->next;
1160         }
1161
1162         /* If here, we have consolidated skb.  Free the
1163          * fragments and pass the main skb on up the
1164          * stack.
1165          */
1166         ath10k_htt_rx_free_msdu_chain(to_free);
1167         return 0;
1168 }
1169
1170 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k_htt *htt,
1171                                         struct sk_buff *head,
1172                                         enum htt_rx_mpdu_status status,
1173                                         bool channel_set,
1174                                         u32 attention)
1175 {
1176         struct ath10k *ar = htt->ar;
1177
1178         if (head->len == 0) {
1179                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1180                            "htt rx dropping due to zero-len\n");
1181                 return false;
1182         }
1183
1184         if (attention & RX_ATTENTION_FLAGS_DECRYPT_ERR) {
1185                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1186                            "htt rx dropping due to decrypt-err\n");
1187                 return false;
1188         }
1189
1190         if (!channel_set) {
1191                 ath10k_warn(ar, "no channel configured; ignoring frame!\n");
1192                 return false;
1193         }
1194
1195         /* Skip mgmt frames while we handle this in WMI */
1196         if (status == HTT_RX_IND_MPDU_STATUS_MGMT_CTRL ||
1197             attention & RX_ATTENTION_FLAGS_MGMT_TYPE) {
1198                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1199                 return false;
1200         }
1201
1202         if (status != HTT_RX_IND_MPDU_STATUS_OK &&
1203             status != HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR &&
1204             status != HTT_RX_IND_MPDU_STATUS_ERR_INV_PEER &&
1205             !htt->ar->monitor_started) {
1206                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1207                            "htt rx ignoring frame w/ status %d\n",
1208                            status);
1209                 return false;
1210         }
1211
1212         if (test_bit(ATH10K_CAC_RUNNING, &htt->ar->dev_flags)) {
1213                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1214                            "htt rx CAC running\n");
1215                 return false;
1216         }
1217
1218         return true;
1219 }
1220
1221 static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
1222                                   struct htt_rx_indication *rx)
1223 {
1224         struct ath10k *ar = htt->ar;
1225         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1226         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1227         struct htt_rx_desc *rxd;
1228         enum htt_rx_mpdu_status status;
1229         struct ieee80211_hdr *hdr;
1230         int num_mpdu_ranges;
1231         u32 attention;
1232         int fw_desc_len;
1233         u8 *fw_desc;
1234         bool channel_set;
1235         int i, j;
1236         int ret;
1237
1238         lockdep_assert_held(&htt->rx_ring.lock);
1239
1240         fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
1241         fw_desc = (u8 *)&rx->fw_desc;
1242
1243         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1244                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1245         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1246
1247         /* Fill this once, while this is per-ppdu */
1248         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_START_VALID) {
1249                 memset(rx_status, 0, sizeof(*rx_status));
1250                 rx_status->signal  = ATH10K_DEFAULT_NOISE_FLOOR +
1251                                      rx->ppdu.combined_rssi;
1252         }
1253
1254         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_END_VALID) {
1255                 /* TSF available only in 32-bit */
1256                 rx_status->mactime = __le32_to_cpu(rx->ppdu.tsf) & 0xffffffff;
1257                 rx_status->flag |= RX_FLAG_MACTIME_END;
1258         }
1259
1260         channel_set = ath10k_htt_rx_h_channel(htt->ar, rx_status);
1261
1262         if (channel_set) {
1263                 ath10k_htt_rx_h_rates(htt->ar, rx_status->band,
1264                                       rx->ppdu.info0,
1265                                       __le32_to_cpu(rx->ppdu.info1),
1266                                       __le32_to_cpu(rx->ppdu.info2),
1267                                       rx_status);
1268         }
1269
1270         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1271                         rx, sizeof(*rx) +
1272                         (sizeof(struct htt_rx_indication_mpdu_range) *
1273                                 num_mpdu_ranges));
1274
1275         for (i = 0; i < num_mpdu_ranges; i++) {
1276                 status = mpdu_ranges[i].mpdu_range_status;
1277
1278                 for (j = 0; j < mpdu_ranges[i].mpdu_count; j++) {
1279                         struct sk_buff *msdu_head, *msdu_tail;
1280
1281                         attention = 0;
1282                         msdu_head = NULL;
1283                         msdu_tail = NULL;
1284                         ret = ath10k_htt_rx_amsdu_pop(htt,
1285                                                       &fw_desc,
1286                                                       &fw_desc_len,
1287                                                       &msdu_head,
1288                                                       &msdu_tail,
1289                                                       &attention);
1290
1291                         if (ret < 0) {
1292                                 ath10k_warn(ar, "failed to pop amsdu from htt rx ring %d\n",
1293                                             ret);
1294                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1295                                 continue;
1296                         }
1297
1298                         rxd = container_of((void *)msdu_head->data,
1299                                            struct htt_rx_desc,
1300                                            msdu_payload);
1301
1302                         if (!ath10k_htt_rx_amsdu_allowed(htt, msdu_head,
1303                                                          status,
1304                                                          channel_set,
1305                                                          attention)) {
1306                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1307                                 continue;
1308                         }
1309
1310                         if (ret > 0 &&
1311                             ath10k_unchain_msdu(msdu_head) < 0) {
1312                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1313                                 continue;
1314                         }
1315
1316                         if (attention & RX_ATTENTION_FLAGS_FCS_ERR)
1317                                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1318                         else
1319                                 rx_status->flag &= ~RX_FLAG_FAILED_FCS_CRC;
1320
1321                         if (attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR)
1322                                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
1323                         else
1324                                 rx_status->flag &= ~RX_FLAG_MMIC_ERROR;
1325
1326                         hdr = ath10k_htt_rx_skb_get_hdr(msdu_head);
1327
1328                         if (ath10k_htt_rx_hdr_is_amsdu(hdr))
1329                                 ath10k_htt_rx_amsdu(htt, rx_status, msdu_head);
1330                         else
1331                                 ath10k_htt_rx_msdu(htt, rx_status, msdu_head);
1332                 }
1333         }
1334
1335         tasklet_schedule(&htt->rx_replenish_task);
1336 }
1337
1338 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1339                                        struct htt_rx_fragment_indication *frag)
1340 {
1341         struct ath10k *ar = htt->ar;
1342         struct sk_buff *msdu_head, *msdu_tail;
1343         enum htt_rx_mpdu_encrypt_type enctype;
1344         struct htt_rx_desc *rxd;
1345         enum rx_msdu_decap_format fmt;
1346         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1347         struct ieee80211_hdr *hdr;
1348         int ret;
1349         bool tkip_mic_err;
1350         bool decrypt_err;
1351         u8 *fw_desc;
1352         int fw_desc_len, hdrlen, paramlen;
1353         int trim;
1354         u32 attention = 0;
1355
1356         fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
1357         fw_desc = (u8 *)frag->fw_msdu_rx_desc;
1358
1359         msdu_head = NULL;
1360         msdu_tail = NULL;
1361
1362         spin_lock_bh(&htt->rx_ring.lock);
1363         ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1364                                       &msdu_head, &msdu_tail,
1365                                       &attention);
1366         spin_unlock_bh(&htt->rx_ring.lock);
1367
1368         ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1369
1370         if (ret) {
1371                 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1372                             ret);
1373                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1374                 return;
1375         }
1376
1377         /* FIXME: implement signal strength */
1378         rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1379
1380         hdr = (struct ieee80211_hdr *)msdu_head->data;
1381         rxd = (void *)msdu_head->data - sizeof(*rxd);
1382         tkip_mic_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1383         decrypt_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1384         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1385                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1386
1387         if (fmt != RX_MSDU_DECAP_RAW) {
1388                 ath10k_warn(ar, "we dont support non-raw fragmented rx yet\n");
1389                 dev_kfree_skb_any(msdu_head);
1390                 goto end;
1391         }
1392
1393         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1394                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1395         ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype, fmt,
1396                                   true);
1397         msdu_head->ip_summed = ath10k_htt_rx_get_csum_state(msdu_head);
1398
1399         if (tkip_mic_err)
1400                 ath10k_warn(ar, "tkip mic error\n");
1401
1402         if (decrypt_err) {
1403                 ath10k_warn(ar, "decryption err in fragmented rx\n");
1404                 dev_kfree_skb_any(msdu_head);
1405                 goto end;
1406         }
1407
1408         if (enctype != HTT_RX_MPDU_ENCRYPT_NONE) {
1409                 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1410                 paramlen = ath10k_htt_rx_crypto_param_len(ar, enctype);
1411
1412                 /* It is more efficient to move the header than the payload */
1413                 memmove((void *)msdu_head->data + paramlen,
1414                         (void *)msdu_head->data,
1415                         hdrlen);
1416                 skb_pull(msdu_head, paramlen);
1417                 hdr = (struct ieee80211_hdr *)msdu_head->data;
1418         }
1419
1420         /* remove trailing FCS */
1421         trim  = 4;
1422
1423         /* remove crypto trailer */
1424         trim += ath10k_htt_rx_crypto_tail_len(ar, enctype);
1425
1426         /* last fragment of TKIP frags has MIC */
1427         if (!ieee80211_has_morefrags(hdr->frame_control) &&
1428             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1429                 trim += 8;
1430
1431         if (trim > msdu_head->len) {
1432                 ath10k_warn(ar, "htt rx fragment: trailer longer than the frame itself? drop\n");
1433                 dev_kfree_skb_any(msdu_head);
1434                 goto end;
1435         }
1436
1437         skb_trim(msdu_head, msdu_head->len - trim);
1438
1439         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx frag mpdu: ",
1440                         msdu_head->data, msdu_head->len);
1441         ath10k_process_rx(htt->ar, rx_status, msdu_head);
1442
1443 end:
1444         if (fw_desc_len > 0) {
1445                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1446                            "expecting more fragmented rx in one indication %d\n",
1447                            fw_desc_len);
1448         }
1449 }
1450
1451 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
1452                                        struct sk_buff *skb)
1453 {
1454         struct ath10k_htt *htt = &ar->htt;
1455         struct htt_resp *resp = (struct htt_resp *)skb->data;
1456         struct htt_tx_done tx_done = {};
1457         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1458         __le16 msdu_id;
1459         int i;
1460
1461         lockdep_assert_held(&htt->tx_lock);
1462
1463         switch (status) {
1464         case HTT_DATA_TX_STATUS_NO_ACK:
1465                 tx_done.no_ack = true;
1466                 break;
1467         case HTT_DATA_TX_STATUS_OK:
1468                 break;
1469         case HTT_DATA_TX_STATUS_DISCARD:
1470         case HTT_DATA_TX_STATUS_POSTPONE:
1471         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1472                 tx_done.discard = true;
1473                 break;
1474         default:
1475                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1476                 tx_done.discard = true;
1477                 break;
1478         }
1479
1480         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1481                    resp->data_tx_completion.num_msdus);
1482
1483         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1484                 msdu_id = resp->data_tx_completion.msdus[i];
1485                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1486                 ath10k_txrx_tx_unref(htt, &tx_done);
1487         }
1488 }
1489
1490 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1491 {
1492         struct htt_rx_addba *ev = &resp->rx_addba;
1493         struct ath10k_peer *peer;
1494         struct ath10k_vif *arvif;
1495         u16 info0, tid, peer_id;
1496
1497         info0 = __le16_to_cpu(ev->info0);
1498         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1499         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1500
1501         ath10k_dbg(ar, ATH10K_DBG_HTT,
1502                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1503                    tid, peer_id, ev->window_size);
1504
1505         spin_lock_bh(&ar->data_lock);
1506         peer = ath10k_peer_find_by_id(ar, peer_id);
1507         if (!peer) {
1508                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1509                             peer_id);
1510                 spin_unlock_bh(&ar->data_lock);
1511                 return;
1512         }
1513
1514         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1515         if (!arvif) {
1516                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1517                             peer->vdev_id);
1518                 spin_unlock_bh(&ar->data_lock);
1519                 return;
1520         }
1521
1522         ath10k_dbg(ar, ATH10K_DBG_HTT,
1523                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1524                    peer->addr, tid, ev->window_size);
1525
1526         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1527         spin_unlock_bh(&ar->data_lock);
1528 }
1529
1530 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1531 {
1532         struct htt_rx_delba *ev = &resp->rx_delba;
1533         struct ath10k_peer *peer;
1534         struct ath10k_vif *arvif;
1535         u16 info0, tid, peer_id;
1536
1537         info0 = __le16_to_cpu(ev->info0);
1538         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1539         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1540
1541         ath10k_dbg(ar, ATH10K_DBG_HTT,
1542                    "htt rx delba tid %hu peer_id %hu\n",
1543                    tid, peer_id);
1544
1545         spin_lock_bh(&ar->data_lock);
1546         peer = ath10k_peer_find_by_id(ar, peer_id);
1547         if (!peer) {
1548                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1549                             peer_id);
1550                 spin_unlock_bh(&ar->data_lock);
1551                 return;
1552         }
1553
1554         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1555         if (!arvif) {
1556                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1557                             peer->vdev_id);
1558                 spin_unlock_bh(&ar->data_lock);
1559                 return;
1560         }
1561
1562         ath10k_dbg(ar, ATH10K_DBG_HTT,
1563                    "htt rx stop rx ba session sta %pM tid %hu\n",
1564                    peer->addr, tid);
1565
1566         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1567         spin_unlock_bh(&ar->data_lock);
1568 }
1569
1570 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
1571 {
1572         struct ath10k_htt *htt = &ar->htt;
1573         struct htt_resp *resp = (struct htt_resp *)skb->data;
1574
1575         /* confirm alignment */
1576         if (!IS_ALIGNED((unsigned long)skb->data, 4))
1577                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
1578
1579         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
1580                    resp->hdr.msg_type);
1581         switch (resp->hdr.msg_type) {
1582         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
1583                 htt->target_version_major = resp->ver_resp.major;
1584                 htt->target_version_minor = resp->ver_resp.minor;
1585                 complete(&htt->target_version_received);
1586                 break;
1587         }
1588         case HTT_T2H_MSG_TYPE_RX_IND:
1589                 spin_lock_bh(&htt->rx_ring.lock);
1590                 __skb_queue_tail(&htt->rx_compl_q, skb);
1591                 spin_unlock_bh(&htt->rx_ring.lock);
1592                 tasklet_schedule(&htt->txrx_compl_task);
1593                 return;
1594         case HTT_T2H_MSG_TYPE_PEER_MAP: {
1595                 struct htt_peer_map_event ev = {
1596                         .vdev_id = resp->peer_map.vdev_id,
1597                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
1598                 };
1599                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
1600                 ath10k_peer_map_event(htt, &ev);
1601                 break;
1602         }
1603         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
1604                 struct htt_peer_unmap_event ev = {
1605                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
1606                 };
1607                 ath10k_peer_unmap_event(htt, &ev);
1608                 break;
1609         }
1610         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
1611                 struct htt_tx_done tx_done = {};
1612                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
1613
1614                 tx_done.msdu_id =
1615                         __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
1616
1617                 switch (status) {
1618                 case HTT_MGMT_TX_STATUS_OK:
1619                         break;
1620                 case HTT_MGMT_TX_STATUS_RETRY:
1621                         tx_done.no_ack = true;
1622                         break;
1623                 case HTT_MGMT_TX_STATUS_DROP:
1624                         tx_done.discard = true;
1625                         break;
1626                 }
1627
1628                 spin_lock_bh(&htt->tx_lock);
1629                 ath10k_txrx_tx_unref(htt, &tx_done);
1630                 spin_unlock_bh(&htt->tx_lock);
1631                 break;
1632         }
1633         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
1634                 spin_lock_bh(&htt->tx_lock);
1635                 __skb_queue_tail(&htt->tx_compl_q, skb);
1636                 spin_unlock_bh(&htt->tx_lock);
1637                 tasklet_schedule(&htt->txrx_compl_task);
1638                 return;
1639         case HTT_T2H_MSG_TYPE_SEC_IND: {
1640                 struct ath10k *ar = htt->ar;
1641                 struct htt_security_indication *ev = &resp->security_indication;
1642
1643                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1644                            "sec ind peer_id %d unicast %d type %d\n",
1645                           __le16_to_cpu(ev->peer_id),
1646                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
1647                           MS(ev->flags, HTT_SECURITY_TYPE));
1648                 complete(&ar->install_key_done);
1649                 break;
1650         }
1651         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
1652                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1653                                 skb->data, skb->len);
1654                 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
1655                 break;
1656         }
1657         case HTT_T2H_MSG_TYPE_TEST:
1658                 /* FIX THIS */
1659                 break;
1660         case HTT_T2H_MSG_TYPE_STATS_CONF:
1661                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
1662                 break;
1663         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
1664                 /* Firmware can return tx frames if it's unable to fully
1665                  * process them and suspects host may be able to fix it. ath10k
1666                  * sends all tx frames as already inspected so this shouldn't
1667                  * happen unless fw has a bug.
1668                  */
1669                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
1670                 break;
1671         case HTT_T2H_MSG_TYPE_RX_ADDBA:
1672                 ath10k_htt_rx_addba(ar, resp);
1673                 break;
1674         case HTT_T2H_MSG_TYPE_RX_DELBA:
1675                 ath10k_htt_rx_delba(ar, resp);
1676                 break;
1677         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
1678                 /* Ignore this event because mac80211 takes care of Rx
1679                  * aggregation reordering.
1680                  */
1681                 break;
1682         }
1683         default:
1684                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt event (%d) not handled\n",
1685                            resp->hdr.msg_type);
1686                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1687                                 skb->data, skb->len);
1688                 break;
1689         };
1690
1691         /* Free the indication buffer */
1692         dev_kfree_skb_any(skb);
1693 }
1694
1695 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
1696 {
1697         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
1698         struct htt_resp *resp;
1699         struct sk_buff *skb;
1700
1701         spin_lock_bh(&htt->tx_lock);
1702         while ((skb = __skb_dequeue(&htt->tx_compl_q))) {
1703                 ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
1704                 dev_kfree_skb_any(skb);
1705         }
1706         spin_unlock_bh(&htt->tx_lock);
1707
1708         spin_lock_bh(&htt->rx_ring.lock);
1709         while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
1710                 resp = (struct htt_resp *)skb->data;
1711                 ath10k_htt_rx_handler(htt, &resp->rx_ind);
1712                 dev_kfree_skb_any(skb);
1713         }
1714         spin_unlock_bh(&htt->rx_ring.lock);
1715 }