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         u32 tsf;
 320
 321         lockdep_assert_held(&htt->rx_ring.lock);
 322
 323         if (htt->rx_confused) {
 324                 ath10k_warn(ar, "htt is confused. refusing rx\n");
 325                 return -1;
 326         }
 327
 328         msdu = *head_msdu = ath10k_htt_rx_netbuf_pop(htt);
 329         while (msdu) {
 330                 int last_msdu, msdu_len_invalid, msdu_chained;
 331
 332                 dma_unmap_single(htt->ar->dev,
 333                                  ATH10K_SKB_CB(msdu)->paddr,
 334                                  msdu->len + skb_tailroom(msdu),
 335                                  DMA_FROM_DEVICE);
 336
 337                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx pop: ",
 338                                 msdu->data, msdu->len + skb_tailroom(msdu));
 339                 trace_ath10k_htt_rx_pop_msdu(ar, msdu->data, msdu->len +
 340                                              skb_tailroom(msdu));
 341
 342                 rx_desc = (struct htt_rx_desc *)msdu->data;
 343
 344                 /* FIXME: we must report msdu payload since this is what caller
 345                  *        expects now */
 346                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 347                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 348
 349                 /*
 350                  * Sanity check - confirm the HW is finished filling in the
 351                  * rx data.
 352                  * If the HW and SW are working correctly, then it's guaranteed
 353                  * that the HW's MAC DMA is done before this point in the SW.
 354                  * To prevent the case that we handle a stale Rx descriptor,
 355                  * just assert for now until we have a way to recover.
 356                  */
 357                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 358                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 359                         ath10k_htt_rx_free_msdu_chain(*head_msdu);
 360                         *head_msdu = NULL;
 361                         msdu = NULL;
 362                         ath10k_err(ar, "htt rx stopped. cannot recover\n");
 363                         htt->rx_confused = true;
 364                         break;
 365                 }
 366
 367                 *attention |= __le32_to_cpu(rx_desc->attention.flags) &
 368                                             (RX_ATTENTION_FLAGS_TKIP_MIC_ERR |
 369                                              RX_ATTENTION_FLAGS_DECRYPT_ERR |
 370                                              RX_ATTENTION_FLAGS_FCS_ERR |
 371                                              RX_ATTENTION_FLAGS_MGMT_TYPE);
 372                 /*
 373                  * Copy the FW rx descriptor for this MSDU from the rx
 374                  * indication message into the MSDU's netbuf. HL uses the
 375                  * same rx indication message definition as LL, and simply
 376                  * appends new info (fields from the HW rx desc, and the
 377                  * MSDU payload itself). So, the offset into the rx
 378                  * indication message only has to account for the standard
 379                  * offset of the per-MSDU FW rx desc info within the
 380                  * message, and how many bytes of the per-MSDU FW rx desc
 381                  * info have already been consumed. (And the endianness of
 382                  * the host, since for a big-endian host, the rx ind
 383                  * message contents, including the per-MSDU rx desc bytes,
 384                  * were byteswapped during upload.)
 385                  */
 386                 if (*fw_desc_len > 0) {
 387                         rx_desc->fw_desc.info0 = **fw_desc;
 388                         /*
 389                          * The target is expected to only provide the basic
 390                          * per-MSDU rx descriptors. Just to be sure, verify
 391                          * that the target has not attached extension data
 392                          * (e.g. LRO flow ID).
 393                          */
 394
 395                         /* or more, if there's extension data */
 396                         (*fw_desc)++;
 397                         (*fw_desc_len)--;
 398                 } else {
 399                         /*
 400                          * When an oversized AMSDU happened, FW will lost
 401                          * some of MSDU status - in this case, the FW
 402                          * descriptors provided will be less than the
 403                          * actual MSDUs inside this MPDU. Mark the FW
 404                          * descriptors so that it will still deliver to
 405                          * upper stack, if no CRC error for this MPDU.
 406                          *
 407                          * FIX THIS - the FW descriptors are actually for
 408                          * MSDUs in the end of this A-MSDU instead of the
 409                          * beginning.
 410                          */
 411                         rx_desc->fw_desc.info0 = 0;
 412                 }
 413
 414                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 415                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 416                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 417                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0),
 418                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 419                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 420
 421                 if (msdu_len_invalid)
 422                         msdu_len = 0;
 423
 424                 skb_trim(msdu, 0);
 425                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 426                 msdu_len -= msdu->len;
 427
 428                 /* FIXME: Do chained buffers include htt_rx_desc or not? */
 429                 while (msdu_chained--) {
 430                         struct sk_buff *next = ath10k_htt_rx_netbuf_pop(htt);
 431
 432                         dma_unmap_single(htt->ar->dev,
 433                                          ATH10K_SKB_CB(next)->paddr,
 434                                          next->len + skb_tailroom(next),
 435                                          DMA_FROM_DEVICE);
 436
 437                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
 438                                         "htt rx chained: ", next->data,
 439                                         next->len + skb_tailroom(next));
 440                         trace_ath10k_htt_rx_pop_msdu(ar, msdu->data, msdu->len +
 441                                                      skb_tailroom(msdu));
 442
 443                         skb_trim(next, 0);
 444                         skb_put(next, min(msdu_len, HTT_RX_BUF_SIZE));
 445                         msdu_len -= next->len;
 446
 447                         msdu->next = next;
 448                         msdu = next;
 449                         msdu_chaining = 1;
 450                 }
 451
 452                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) &
 453                                 RX_MSDU_END_INFO0_LAST_MSDU;
 454
 455                 tsf = __le32_to_cpu(rx_desc->ppdu_end.tsf_timestamp);
 456                 trace_ath10k_htt_rx_desc(ar, tsf, &rx_desc->attention,
 457                                          sizeof(*rx_desc) - sizeof(u32));
 458                 if (last_msdu) {
 459                         msdu->next = NULL;
 460                         break;
 461                 }
 462
 463                 next = ath10k_htt_rx_netbuf_pop(htt);
 464                 msdu->next = next;
 465                 msdu = next;
 466         }
 467         *tail_msdu = msdu;
 468
 469         if (*head_msdu == NULL)
 470                 msdu_chaining = -1;
 471
 472         /*
 473          * Don't refill the ring yet.
 474          *
 475          * First, the elements popped here are still in use - it is not
 476          * safe to overwrite them until the matching call to
 477          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 478          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 479          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 480          * (something like 3 buffers). Consequently, we'll rely on the txrx
 481          * SW to tell us when it is done pulling all the PPDU's rx buffers
 482          * out of the rx ring, and then refill it just once.
 483          */
 484
 485         return msdu_chaining;
 486 }
 487
 488 static void ath10k_htt_rx_replenish_task(unsigned long ptr)
 489 {
 490         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
 491
 492         ath10k_htt_rx_msdu_buff_replenish(htt);
 493 }
 494
 495 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 496 {
 497         struct ath10k *ar = htt->ar;
 498         dma_addr_t paddr;
 499         void *vaddr;
 500         size_t size;
 501         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 502
 503         htt->rx_ring.size = ath10k_htt_rx_ring_size(htt);
 504         if (!is_power_of_2(htt->rx_ring.size)) {
 505                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 506                 return -EINVAL;
 507         }
 508
 509         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 510
 511         /*
 512          * Set the initial value for the level to which the rx ring
 513          * should be filled, based on the max throughput and the
 514          * worst likely latency for the host to fill the rx ring
 515          * with new buffers. In theory, this fill level can be
 516          * dynamically adjusted from the initial value set here, to
 517          * reflect the actual host latency rather than a
 518          * conservative assumption about the host latency.
 519          */
 520         htt->rx_ring.fill_level = ath10k_htt_rx_ring_fill_level(htt);
 521
 522         htt->rx_ring.netbufs_ring =
 523                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 524                         GFP_KERNEL);
 525         if (!htt->rx_ring.netbufs_ring)
 526                 goto err_netbuf;
 527
 528         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 529
 530         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
 531         if (!vaddr)
 532                 goto err_dma_ring;
 533
 534         htt->rx_ring.paddrs_ring = vaddr;
 535         htt->rx_ring.base_paddr = paddr;
 536
 537         vaddr = dma_alloc_coherent(htt->ar->dev,
 538                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 539                                    &paddr, GFP_DMA);
 540         if (!vaddr)
 541                 goto err_dma_idx;
 542
 543         htt->rx_ring.alloc_idx.vaddr = vaddr;
 544         htt->rx_ring.alloc_idx.paddr = paddr;
 545         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 546         *htt->rx_ring.alloc_idx.vaddr = 0;
 547
 548         /* Initialize the Rx refill retry timer */
 549         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 550
 551         spin_lock_init(&htt->rx_ring.lock);
 552
 553         htt->rx_ring.fill_cnt = 0;
 554         if (__ath10k_htt_rx_ring_fill_n(htt, htt->rx_ring.fill_level))
 555                 goto err_fill_ring;
 556
 557         tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
 558                      (unsigned long)htt);
 559
 560         skb_queue_head_init(&htt->tx_compl_q);
 561         skb_queue_head_init(&htt->rx_compl_q);
 562
 563         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 564                      (unsigned long)htt);
 565
 566         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 567                    htt->rx_ring.size, htt->rx_ring.fill_level);
 568         return 0;
 569
 570 err_fill_ring:
 571         ath10k_htt_rx_ring_free(htt);
 572         dma_free_coherent(htt->ar->dev,
 573                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 574                           htt->rx_ring.alloc_idx.vaddr,
 575                           htt->rx_ring.alloc_idx.paddr);
 576 err_dma_idx:
 577         dma_free_coherent(htt->ar->dev,
 578                           (htt->rx_ring.size *
 579                            sizeof(htt->rx_ring.paddrs_ring)),
 580                           htt->rx_ring.paddrs_ring,
 581                           htt->rx_ring.base_paddr);
 582 err_dma_ring:
 583         kfree(htt->rx_ring.netbufs_ring);
 584 err_netbuf:
 585         return -ENOMEM;
 586 }
 587
 588 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 589                                           enum htt_rx_mpdu_encrypt_type type)
 590 {
 591         switch (type) {
 592         case HTT_RX_MPDU_ENCRYPT_NONE:
 593                 return 0;
 594         case HTT_RX_MPDU_ENCRYPT_WEP40:
 595         case HTT_RX_MPDU_ENCRYPT_WEP104:
 596                 return IEEE80211_WEP_IV_LEN;
 597         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 598         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 599                 return IEEE80211_TKIP_IV_LEN;
 600         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 601                 return IEEE80211_CCMP_HDR_LEN;
 602         case HTT_RX_MPDU_ENCRYPT_WEP128:
 603         case HTT_RX_MPDU_ENCRYPT_WAPI:
 604                 break;
 605         }
 606
 607         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 608         return 0;
 609 }
 610
 611 #define MICHAEL_MIC_LEN 8
 612
 613 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 614                                          enum htt_rx_mpdu_encrypt_type type)
 615 {
 616         switch (type) {
 617         case HTT_RX_MPDU_ENCRYPT_NONE:
 618                 return 0;
 619         case HTT_RX_MPDU_ENCRYPT_WEP40:
 620         case HTT_RX_MPDU_ENCRYPT_WEP104:
 621                 return IEEE80211_WEP_ICV_LEN;
 622         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 623         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 624                 return IEEE80211_TKIP_ICV_LEN;
 625         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 626                 return IEEE80211_CCMP_MIC_LEN;
 627         case HTT_RX_MPDU_ENCRYPT_WEP128:
 628         case HTT_RX_MPDU_ENCRYPT_WAPI:
 629                 break;
 630         }
 631
 632         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 633         return 0;
 634 }
 635
 636 /* Applies for first msdu in chain, before altering it. */
 637 static struct ieee80211_hdr *ath10k_htt_rx_skb_get_hdr(struct sk_buff *skb)
 638 {
 639         struct htt_rx_desc *rxd;
 640         enum rx_msdu_decap_format fmt;
 641
 642         rxd = (void *)skb->data - sizeof(*rxd);
 643         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 644                  RX_MSDU_START_INFO1_DECAP_FORMAT);
 645
 646         if (fmt == RX_MSDU_DECAP_RAW)
 647                 return (void *)skb->data;
 648
 649         return (void *)skb->data - RX_HTT_HDR_STATUS_LEN;
 650 }
 651
 652 /* This function only applies for first msdu in an msdu chain */
 653 static bool ath10k_htt_rx_hdr_is_amsdu(struct ieee80211_hdr *hdr)
 654 {
 655         u8 *qc;
 656
 657         if (ieee80211_is_data_qos(hdr->frame_control)) {
 658                 qc = ieee80211_get_qos_ctl(hdr);
 659                 if (qc[0] & 0x80)
 660                         return true;
 661         }
 662         return false;
 663 }
 664
 665 struct rfc1042_hdr {
 666         u8 llc_dsap;
 667         u8 llc_ssap;
 668         u8 llc_ctrl;
 669         u8 snap_oui[3];
 670         __be16 snap_type;
 671 } __packed;
 672
 673 struct amsdu_subframe_hdr {
 674         u8 dst[ETH_ALEN];
 675         u8 src[ETH_ALEN];
 676         __be16 len;
 677 } __packed;
 678
 679 static const u8 rx_legacy_rate_idx[] = {
 680         3,      /* 0x00  - 11Mbps  */
 681         2,      /* 0x01  - 5.5Mbps */
 682         1,      /* 0x02  - 2Mbps   */
 683         0,      /* 0x03  - 1Mbps   */
 684         3,      /* 0x04  - 11Mbps  */
 685         2,      /* 0x05  - 5.5Mbps */
 686         1,      /* 0x06  - 2Mbps   */
 687         0,      /* 0x07  - 1Mbps   */
 688         10,     /* 0x08  - 48Mbps  */
 689         8,      /* 0x09  - 24Mbps  */
 690         6,      /* 0x0A  - 12Mbps  */
 691         4,      /* 0x0B  - 6Mbps   */
 692         11,     /* 0x0C  - 54Mbps  */
 693         9,      /* 0x0D  - 36Mbps  */
 694         7,      /* 0x0E  - 18Mbps  */
 695         5,      /* 0x0F  - 9Mbps   */
 696 };
 697
 698 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 699                                   enum ieee80211_band band,
 700                                   u8 info0, u32 info1, u32 info2,
 701                                   struct ieee80211_rx_status *status)
 702 {
 703         u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
 704         u8 preamble = 0;
 705
 706         /* Check if valid fields */
 707         if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
 708                 return;
 709
 710         preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
 711
 712         switch (preamble) {
 713         case HTT_RX_LEGACY:
 714                 cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
 715                 rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
 716                 rate_idx = 0;
 717
 718                 if (rate < 0x08 || rate > 0x0F)
 719                         break;
 720
 721                 switch (band) {
 722                 case IEEE80211_BAND_2GHZ:
 723                         if (cck)
 724                                 rate &= ~BIT(3);
 725                         rate_idx = rx_legacy_rate_idx[rate];
 726                         break;
 727                 case IEEE80211_BAND_5GHZ:
 728                         rate_idx = rx_legacy_rate_idx[rate];
 729                         /* We are using same rate table registering
 730                            HW - ath10k_rates[]. In case of 5GHz skip
 731                            CCK rates, so -4 here */
 732                         rate_idx -= 4;
 733                         break;
 734                 default:
 735                         break;
 736                 }
 737
 738                 status->rate_idx = rate_idx;
 739                 break;
 740         case HTT_RX_HT:
 741         case HTT_RX_HT_WITH_TXBF:
 742                 /* HT-SIG - Table 20-11 in info1 and info2 */
 743                 mcs = info1 & 0x1F;
 744                 nss = mcs >> 3;
 745                 bw = (info1 >> 7) & 1;
 746                 sgi = (info2 >> 7) & 1;
 747
 748                 status->rate_idx = mcs;
 749                 status->flag |= RX_FLAG_HT;
 750                 if (sgi)
 751                         status->flag |= RX_FLAG_SHORT_GI;
 752                 if (bw)
 753                         status->flag |= RX_FLAG_40MHZ;
 754                 break;
 755         case HTT_RX_VHT:
 756         case HTT_RX_VHT_WITH_TXBF:
 757                 /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
 758                    TODO check this */
 759                 mcs = (info2 >> 4) & 0x0F;
 760                 nss = ((info1 >> 10) & 0x07) + 1;
 761                 bw = info1 & 3;
 762                 sgi = info2 & 1;
 763
 764                 status->rate_idx = mcs;
 765                 status->vht_nss = nss;
 766
 767                 if (sgi)
 768                         status->flag |= RX_FLAG_SHORT_GI;
 769
 770                 switch (bw) {
 771                 /* 20MHZ */
 772                 case 0:
 773                         break;
 774                 /* 40MHZ */
 775                 case 1:
 776                         status->flag |= RX_FLAG_40MHZ;
 777                         break;
 778                 /* 80MHZ */
 779                 case 2:
 780                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 781                 }
 782
 783                 status->flag |= RX_FLAG_VHT;
 784                 break;
 785         default:
 786                 break;
 787         }
 788 }
 789
 790 static void ath10k_htt_rx_h_protected(struct ath10k_htt *htt,
 791                                       struct ieee80211_rx_status *rx_status,
 792                                       struct sk_buff *skb,
 793                                       enum htt_rx_mpdu_encrypt_type enctype,
 794                                       enum rx_msdu_decap_format fmt,
 795                                       bool dot11frag)
 796 {
 797         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 798
 799         rx_status->flag &= ~(RX_FLAG_DECRYPTED |
 800                              RX_FLAG_IV_STRIPPED |
 801                              RX_FLAG_MMIC_STRIPPED);
 802
 803         if (enctype == HTT_RX_MPDU_ENCRYPT_NONE)
 804                 return;
 805
 806         /*
 807          * There's no explicit rx descriptor flag to indicate whether a given
 808          * frame has been decrypted or not. We're forced to use the decap
 809          * format as an implicit indication. However fragmentation rx is always
 810          * raw and it probably never reports undecrypted raws.
 811          *
 812          * This makes sure sniffed frames are reported as-is without stripping
 813          * the protected flag.
 814          */
 815         if (fmt == RX_MSDU_DECAP_RAW && !dot11frag)
 816                 return;
 817
 818         rx_status->flag |= RX_FLAG_DECRYPTED |
 819                            RX_FLAG_IV_STRIPPED |
 820                            RX_FLAG_MMIC_STRIPPED;
 821         hdr->frame_control = __cpu_to_le16(__le16_to_cpu(hdr->frame_control) &
 822                                            ~IEEE80211_FCTL_PROTECTED);
 823 }
 824
 825 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 826                                     struct ieee80211_rx_status *status)
 827 {
 828         struct ieee80211_channel *ch;
 829
 830         spin_lock_bh(&ar->data_lock);
 831         ch = ar->scan_channel;
 832         if (!ch)
 833                 ch = ar->rx_channel;
 834         spin_unlock_bh(&ar->data_lock);
 835
 836         if (!ch)
 837                 return false;
 838
 839         status->band = ch->band;
 840         status->freq = ch->center_freq;
 841
 842         return true;
 843 }
 844
 845 static const char * const tid_to_ac[] = {
 846         "BE",
 847         "BK",
 848         "BK",
 849         "BE",
 850         "VI",
 851         "VI",
 852         "VO",
 853         "VO",
 854 };
 855
 856 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 857 {
 858         u8 *qc;
 859         int tid;
 860
 861         if (!ieee80211_is_data_qos(hdr->frame_control))
 862                 return "";
 863
 864         qc = ieee80211_get_qos_ctl(hdr);
 865         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 866         if (tid < 8)
 867                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 868         else
 869                 snprintf(out, size, "tid %d", tid);
 870
 871         return out;
 872 }
 873
 874 static void ath10k_process_rx(struct ath10k *ar,
 875                               struct ieee80211_rx_status *rx_status,
 876                               struct sk_buff *skb)
 877 {
 878         struct ieee80211_rx_status *status;
 879         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 880         char tid[32];
 881
 882         status = IEEE80211_SKB_RXCB(skb);
 883         *status = *rx_status;
 884
 885         ath10k_dbg(ar, ATH10K_DBG_DATA,
 886                    "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",
 887                    skb,
 888                    skb->len,
 889                    ieee80211_get_SA(hdr),
 890                    ath10k_get_tid(hdr, tid, sizeof(tid)),
 891                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
 892                                                         "mcast" : "ucast",
 893                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
 894                    status->flag == 0 ? "legacy" : "",
 895                    status->flag & RX_FLAG_HT ? "ht" : "",
 896                    status->flag & RX_FLAG_VHT ? "vht" : "",
 897                    status->flag & RX_FLAG_40MHZ ? "40" : "",
 898                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
 899                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
 900                    status->rate_idx,
 901                    status->vht_nss,
 902                    status->freq,
 903                    status->band, status->flag,
 904                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
 905                    !!(status->flag & RX_FLAG_MMIC_ERROR),
 906                    !!(status->flag & RX_FLAG_AMSDU_MORE));
 907         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
 908                         skb->data, skb->len);
 909
 910         ieee80211_rx(ar->hw, skb);
 911 }
 912
 913 static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr)
 914 {
 915         /* nwifi header is padded to 4 bytes. this fixes 4addr rx */
 916         return round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 917 }
 918
 919 static void ath10k_htt_rx_amsdu(struct ath10k_htt *htt,
 920                                 struct ieee80211_rx_status *rx_status,
 921                                 struct sk_buff *skb_in)
 922 {
 923         struct ath10k *ar = htt->ar;
 924         struct htt_rx_desc *rxd;
 925         struct sk_buff *skb = skb_in;
 926         struct sk_buff *first;
 927         enum rx_msdu_decap_format fmt;
 928         enum htt_rx_mpdu_encrypt_type enctype;
 929         struct ieee80211_hdr *hdr;
 930         u8 hdr_buf[64], da[ETH_ALEN], sa[ETH_ALEN], *qos;
 931         unsigned int hdr_len;
 932
 933         rxd = (void *)skb->data - sizeof(*rxd);
 934         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 935                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
 936
 937         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
 938         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 939         memcpy(hdr_buf, hdr, hdr_len);
 940         hdr = (struct ieee80211_hdr *)hdr_buf;
 941
 942         first = skb;
 943         while (skb) {
 944                 void *decap_hdr;
 945                 int len;
 946
 947                 rxd = (void *)skb->data - sizeof(*rxd);
 948                 fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 949                          RX_MSDU_START_INFO1_DECAP_FORMAT);
 950                 decap_hdr = (void *)rxd->rx_hdr_status;
 951
 952                 skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
 953
 954                 /* First frame in an A-MSDU chain has more decapped data. */
 955                 if (skb == first) {
 956                         len = round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 957                         len += round_up(ath10k_htt_rx_crypto_param_len(ar,
 958                                                 enctype), 4);
 959                         decap_hdr += len;
 960                 }
 961
 962                 switch (fmt) {
 963                 case RX_MSDU_DECAP_RAW:
 964                         /* remove trailing FCS */
 965                         skb_trim(skb, skb->len - FCS_LEN);
 966                         break;
 967                 case RX_MSDU_DECAP_NATIVE_WIFI:
 968                         /* pull decapped header and copy SA & DA */
 969                         hdr = (struct ieee80211_hdr *)skb->data;
 970                         hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
 971                         ether_addr_copy(da, ieee80211_get_DA(hdr));
 972                         ether_addr_copy(sa, ieee80211_get_SA(hdr));
 973                         skb_pull(skb, hdr_len);
 974
 975                         /* push original 802.11 header */
 976                         hdr = (struct ieee80211_hdr *)hdr_buf;
 977                         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 978                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 979
 980                         /* original A-MSDU header has the bit set but we're
 981                          * not including A-MSDU subframe header */
 982                         hdr = (struct ieee80211_hdr *)skb->data;
 983                         qos = ieee80211_get_qos_ctl(hdr);
 984                         qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 985
 986                         /* original 802.11 header has a different DA and in
 987                          * case of 4addr it may also have different SA
 988                          */
 989                         ether_addr_copy(ieee80211_get_DA(hdr), da);
 990                         ether_addr_copy(ieee80211_get_SA(hdr), sa);
 991                         break;
 992                 case RX_MSDU_DECAP_ETHERNET2_DIX:
 993                         /* strip ethernet header and insert decapped 802.11
 994                          * header, amsdu subframe header and rfc1042 header */
 995
 996                         len = 0;
 997                         len += sizeof(struct rfc1042_hdr);
 998                         len += sizeof(struct amsdu_subframe_hdr);
 999
1000                         skb_pull(skb, sizeof(struct ethhdr));
1001                         memcpy(skb_push(skb, len), decap_hdr, len);
1002                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1003                         break;
1004                 case RX_MSDU_DECAP_8023_SNAP_LLC:
1005                         /* insert decapped 802.11 header making a singly
1006                          * A-MSDU */
1007                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1008                         break;
1009                 }
1010
1011                 skb_in = skb;
1012                 ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype, fmt,
1013                                           false);
1014                 skb = skb->next;
1015                 skb_in->next = NULL;
1016
1017                 if (skb)
1018                         rx_status->flag |= RX_FLAG_AMSDU_MORE;
1019                 else
1020                         rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
1021
1022                 ath10k_process_rx(htt->ar, rx_status, skb_in);
1023         }
1024
1025         /* FIXME: It might be nice to re-assemble the A-MSDU when there's a
1026          * monitor interface active for sniffing purposes. */
1027 }
1028
1029 static void ath10k_htt_rx_msdu(struct ath10k_htt *htt,
1030                                struct ieee80211_rx_status *rx_status,
1031                                struct sk_buff *skb)
1032 {
1033         struct ath10k *ar = htt->ar;
1034         struct htt_rx_desc *rxd;
1035         struct ieee80211_hdr *hdr;
1036         enum rx_msdu_decap_format fmt;
1037         enum htt_rx_mpdu_encrypt_type enctype;
1038         int hdr_len;
1039         void *rfc1042;
1040
1041         /* This shouldn't happen. If it does than it may be a FW bug. */
1042         if (skb->next) {
1043                 ath10k_warn(ar, "htt rx received chained non A-MSDU frame\n");
1044                 ath10k_htt_rx_free_msdu_chain(skb->next);
1045                 skb->next = NULL;
1046         }
1047
1048         rxd = (void *)skb->data - sizeof(*rxd);
1049         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1050                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1051         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1052                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1053         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1054         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1055
1056         skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
1057
1058         switch (fmt) {
1059         case RX_MSDU_DECAP_RAW:
1060                 /* remove trailing FCS */
1061                 skb_trim(skb, skb->len - FCS_LEN);
1062                 break;
1063         case RX_MSDU_DECAP_NATIVE_WIFI:
1064                 /* Pull decapped header */
1065                 hdr = (struct ieee80211_hdr *)skb->data;
1066                 hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
1067                 skb_pull(skb, hdr_len);
1068
1069                 /* Push original header */
1070                 hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1071                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1072                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1073                 break;
1074         case RX_MSDU_DECAP_ETHERNET2_DIX:
1075                 /* strip ethernet header and insert decapped 802.11 header and
1076                  * rfc1042 header */
1077
1078                 rfc1042 = hdr;
1079                 rfc1042 += roundup(hdr_len, 4);
1080                 rfc1042 += roundup(ath10k_htt_rx_crypto_param_len(ar,
1081                                         enctype), 4);
1082
1083                 skb_pull(skb, sizeof(struct ethhdr));
1084                 memcpy(skb_push(skb, sizeof(struct rfc1042_hdr)),
1085                        rfc1042, sizeof(struct rfc1042_hdr));
1086                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1087                 break;
1088         case RX_MSDU_DECAP_8023_SNAP_LLC:
1089                 /* remove A-MSDU subframe header and insert
1090                  * decapped 802.11 header. rfc1042 header is already there */
1091
1092                 skb_pull(skb, sizeof(struct amsdu_subframe_hdr));
1093                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1094                 break;
1095         }
1096
1097         ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype, fmt, false);
1098
1099         ath10k_process_rx(htt->ar, rx_status, skb);
1100 }
1101
1102 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1103 {
1104         struct htt_rx_desc *rxd;
1105         u32 flags, info;
1106         bool is_ip4, is_ip6;
1107         bool is_tcp, is_udp;
1108         bool ip_csum_ok, tcpudp_csum_ok;
1109
1110         rxd = (void *)skb->data - sizeof(*rxd);
1111         flags = __le32_to_cpu(rxd->attention.flags);
1112         info = __le32_to_cpu(rxd->msdu_start.info1);
1113
1114         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1115         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1116         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1117         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1118         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1119         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1120
1121         if (!is_ip4 && !is_ip6)
1122                 return CHECKSUM_NONE;
1123         if (!is_tcp && !is_udp)
1124                 return CHECKSUM_NONE;
1125         if (!ip_csum_ok)
1126                 return CHECKSUM_NONE;
1127         if (!tcpudp_csum_ok)
1128                 return CHECKSUM_NONE;
1129
1130         return CHECKSUM_UNNECESSARY;
1131 }
1132
1133 static int ath10k_unchain_msdu(struct sk_buff *msdu_head)
1134 {
1135         struct sk_buff *next = msdu_head->next;
1136         struct sk_buff *to_free = next;
1137         int space;
1138         int total_len = 0;
1139
1140         /* TODO:  Might could optimize this by using
1141          * skb_try_coalesce or similar method to
1142          * decrease copying, or maybe get mac80211 to
1143          * provide a way to just receive a list of
1144          * skb?
1145          */
1146
1147         msdu_head->next = NULL;
1148
1149         /* Allocate total length all at once. */
1150         while (next) {
1151                 total_len += next->len;
1152                 next = next->next;
1153         }
1154
1155         space = total_len - skb_tailroom(msdu_head);
1156         if ((space > 0) &&
1157             (pskb_expand_head(msdu_head, 0, space, GFP_ATOMIC) < 0)) {
1158                 /* TODO:  bump some rx-oom error stat */
1159                 /* put it back together so we can free the
1160                  * whole list at once.
1161                  */
1162                 msdu_head->next = to_free;
1163                 return -1;
1164         }
1165
1166         /* Walk list again, copying contents into
1167          * msdu_head
1168          */
1169         next = to_free;
1170         while (next) {
1171                 skb_copy_from_linear_data(next, skb_put(msdu_head, next->len),
1172                                           next->len);
1173                 next = next->next;
1174         }
1175
1176         /* If here, we have consolidated skb.  Free the
1177          * fragments and pass the main skb on up the
1178          * stack.
1179          */
1180         ath10k_htt_rx_free_msdu_chain(to_free);
1181         return 0;
1182 }
1183
1184 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k_htt *htt,
1185                                         struct sk_buff *head,
1186                                         enum htt_rx_mpdu_status status,
1187                                         bool channel_set,
1188                                         u32 attention)
1189 {
1190         struct ath10k *ar = htt->ar;
1191
1192         if (head->len == 0) {
1193                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1194                            "htt rx dropping due to zero-len\n");
1195                 return false;
1196         }
1197
1198         if (attention & RX_ATTENTION_FLAGS_DECRYPT_ERR) {
1199                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1200                            "htt rx dropping due to decrypt-err\n");
1201                 return false;
1202         }
1203
1204         if (!channel_set) {
1205                 ath10k_warn(ar, "no channel configured; ignoring frame!\n");
1206                 return false;
1207         }
1208
1209         /* Skip mgmt frames while we handle this in WMI */
1210         if (attention & RX_ATTENTION_FLAGS_MGMT_TYPE) {
1211                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1212                 return false;
1213         }
1214
1215         if (status != HTT_RX_IND_MPDU_STATUS_OK &&
1216             status != HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR &&
1217             status != HTT_RX_IND_MPDU_STATUS_ERR_INV_PEER &&
1218             !htt->ar->monitor_started) {
1219                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1220                            "htt rx ignoring frame w/ status %d\n",
1221                            status);
1222                 return false;
1223         }
1224
1225         if (test_bit(ATH10K_CAC_RUNNING, &htt->ar->dev_flags)) {
1226                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1227                            "htt rx CAC running\n");
1228                 return false;
1229         }
1230
1231         return true;
1232 }
1233
1234 static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
1235                                   struct htt_rx_indication *rx)
1236 {
1237         struct ath10k *ar = htt->ar;
1238         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1239         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1240         enum htt_rx_mpdu_status status;
1241         struct ieee80211_hdr *hdr;
1242         int num_mpdu_ranges;
1243         u32 attention;
1244         int fw_desc_len;
1245         u8 *fw_desc;
1246         bool channel_set;
1247         int i, j;
1248         int ret;
1249
1250         lockdep_assert_held(&htt->rx_ring.lock);
1251
1252         fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
1253         fw_desc = (u8 *)&rx->fw_desc;
1254
1255         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1256                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1257         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1258
1259         /* Fill this once, while this is per-ppdu */
1260         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_START_VALID) {
1261                 memset(rx_status, 0, sizeof(*rx_status));
1262                 rx_status->signal  = ATH10K_DEFAULT_NOISE_FLOOR +
1263                                      rx->ppdu.combined_rssi;
1264         }
1265
1266         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_END_VALID) {
1267                 /* TSF available only in 32-bit */
1268                 rx_status->mactime = __le32_to_cpu(rx->ppdu.tsf) & 0xffffffff;
1269                 rx_status->flag |= RX_FLAG_MACTIME_END;
1270         }
1271
1272         channel_set = ath10k_htt_rx_h_channel(htt->ar, rx_status);
1273
1274         if (channel_set) {
1275                 ath10k_htt_rx_h_rates(htt->ar, rx_status->band,
1276                                       rx->ppdu.info0,
1277                                       __le32_to_cpu(rx->ppdu.info1),
1278                                       __le32_to_cpu(rx->ppdu.info2),
1279                                       rx_status);
1280         }
1281
1282         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1283                         rx, sizeof(*rx) +
1284                         (sizeof(struct htt_rx_indication_mpdu_range) *
1285                                 num_mpdu_ranges));
1286
1287         for (i = 0; i < num_mpdu_ranges; i++) {
1288                 status = mpdu_ranges[i].mpdu_range_status;
1289
1290                 for (j = 0; j < mpdu_ranges[i].mpdu_count; j++) {
1291                         struct sk_buff *msdu_head, *msdu_tail;
1292
1293                         attention = 0;
1294                         msdu_head = NULL;
1295                         msdu_tail = NULL;
1296                         ret = ath10k_htt_rx_amsdu_pop(htt,
1297                                                       &fw_desc,
1298                                                       &fw_desc_len,
1299                                                       &msdu_head,
1300                                                       &msdu_tail,
1301                                                       &attention);
1302
1303                         if (ret < 0) {
1304                                 ath10k_warn(ar, "failed to pop amsdu from htt rx ring %d\n",
1305                                             ret);
1306                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1307                                 continue;
1308                         }
1309
1310                         if (!ath10k_htt_rx_amsdu_allowed(htt, msdu_head,
1311                                                          status,
1312                                                          channel_set,
1313                                                          attention)) {
1314                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1315                                 continue;
1316                         }
1317
1318                         if (ret > 0 &&
1319                             ath10k_unchain_msdu(msdu_head) < 0) {
1320                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1321                                 continue;
1322                         }
1323
1324                         if (attention & RX_ATTENTION_FLAGS_FCS_ERR)
1325                                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1326                         else
1327                                 rx_status->flag &= ~RX_FLAG_FAILED_FCS_CRC;
1328
1329                         if (attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR)
1330                                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
1331                         else
1332                                 rx_status->flag &= ~RX_FLAG_MMIC_ERROR;
1333
1334                         hdr = ath10k_htt_rx_skb_get_hdr(msdu_head);
1335
1336                         if (ath10k_htt_rx_hdr_is_amsdu(hdr))
1337                                 ath10k_htt_rx_amsdu(htt, rx_status, msdu_head);
1338                         else
1339                                 ath10k_htt_rx_msdu(htt, rx_status, msdu_head);
1340                 }
1341         }
1342
1343         tasklet_schedule(&htt->rx_replenish_task);
1344 }
1345
1346 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1347                                        struct htt_rx_fragment_indication *frag)
1348 {
1349         struct ath10k *ar = htt->ar;
1350         struct sk_buff *msdu_head, *msdu_tail;
1351         enum htt_rx_mpdu_encrypt_type enctype;
1352         struct htt_rx_desc *rxd;
1353         enum rx_msdu_decap_format fmt;
1354         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1355         struct ieee80211_hdr *hdr;
1356         int ret;
1357         bool tkip_mic_err;
1358         bool decrypt_err;
1359         u8 *fw_desc;
1360         int fw_desc_len, hdrlen, paramlen;
1361         int trim;
1362         u32 attention = 0;
1363
1364         fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
1365         fw_desc = (u8 *)frag->fw_msdu_rx_desc;
1366
1367         msdu_head = NULL;
1368         msdu_tail = NULL;
1369
1370         spin_lock_bh(&htt->rx_ring.lock);
1371         ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1372                                       &msdu_head, &msdu_tail,
1373                                       &attention);
1374         spin_unlock_bh(&htt->rx_ring.lock);
1375
1376         ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1377
1378         if (ret) {
1379                 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1380                             ret);
1381                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1382                 return;
1383         }
1384
1385         /* FIXME: implement signal strength */
1386         rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1387
1388         hdr = (struct ieee80211_hdr *)msdu_head->data;
1389         rxd = (void *)msdu_head->data - sizeof(*rxd);
1390         tkip_mic_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1391         decrypt_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1392         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1393                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1394
1395         if (fmt != RX_MSDU_DECAP_RAW) {
1396                 ath10k_warn(ar, "we dont support non-raw fragmented rx yet\n");
1397                 dev_kfree_skb_any(msdu_head);
1398                 goto end;
1399         }
1400
1401         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1402                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1403         ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype, fmt,
1404                                   true);
1405         msdu_head->ip_summed = ath10k_htt_rx_get_csum_state(msdu_head);
1406
1407         if (tkip_mic_err)
1408                 ath10k_warn(ar, "tkip mic error\n");
1409
1410         if (decrypt_err) {
1411                 ath10k_warn(ar, "decryption err in fragmented rx\n");
1412                 dev_kfree_skb_any(msdu_head);
1413                 goto end;
1414         }
1415
1416         if (enctype != HTT_RX_MPDU_ENCRYPT_NONE) {
1417                 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1418                 paramlen = ath10k_htt_rx_crypto_param_len(ar, enctype);
1419
1420                 /* It is more efficient to move the header than the payload */
1421                 memmove((void *)msdu_head->data + paramlen,
1422                         (void *)msdu_head->data,
1423                         hdrlen);
1424                 skb_pull(msdu_head, paramlen);
1425                 hdr = (struct ieee80211_hdr *)msdu_head->data;
1426         }
1427
1428         /* remove trailing FCS */
1429         trim  = 4;
1430
1431         /* remove crypto trailer */
1432         trim += ath10k_htt_rx_crypto_tail_len(ar, enctype);
1433
1434         /* last fragment of TKIP frags has MIC */
1435         if (!ieee80211_has_morefrags(hdr->frame_control) &&
1436             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1437                 trim += MICHAEL_MIC_LEN;
1438
1439         if (trim > msdu_head->len) {
1440                 ath10k_warn(ar, "htt rx fragment: trailer longer than the frame itself? drop\n");
1441                 dev_kfree_skb_any(msdu_head);
1442                 goto end;
1443         }
1444
1445         skb_trim(msdu_head, msdu_head->len - trim);
1446
1447         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx frag mpdu: ",
1448                         msdu_head->data, msdu_head->len);
1449         ath10k_process_rx(htt->ar, rx_status, msdu_head);
1450
1451 end:
1452         if (fw_desc_len > 0) {
1453                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1454                            "expecting more fragmented rx in one indication %d\n",
1455                            fw_desc_len);
1456         }
1457 }
1458
1459 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
1460                                        struct sk_buff *skb)
1461 {
1462         struct ath10k_htt *htt = &ar->htt;
1463         struct htt_resp *resp = (struct htt_resp *)skb->data;
1464         struct htt_tx_done tx_done = {};
1465         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1466         __le16 msdu_id;
1467         int i;
1468
1469         lockdep_assert_held(&htt->tx_lock);
1470
1471         switch (status) {
1472         case HTT_DATA_TX_STATUS_NO_ACK:
1473                 tx_done.no_ack = true;
1474                 break;
1475         case HTT_DATA_TX_STATUS_OK:
1476                 break;
1477         case HTT_DATA_TX_STATUS_DISCARD:
1478         case HTT_DATA_TX_STATUS_POSTPONE:
1479         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1480                 tx_done.discard = true;
1481                 break;
1482         default:
1483                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1484                 tx_done.discard = true;
1485                 break;
1486         }
1487
1488         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1489                    resp->data_tx_completion.num_msdus);
1490
1491         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1492                 msdu_id = resp->data_tx_completion.msdus[i];
1493                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1494                 ath10k_txrx_tx_unref(htt, &tx_done);
1495         }
1496 }
1497
1498 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1499 {
1500         struct htt_rx_addba *ev = &resp->rx_addba;
1501         struct ath10k_peer *peer;
1502         struct ath10k_vif *arvif;
1503         u16 info0, tid, peer_id;
1504
1505         info0 = __le16_to_cpu(ev->info0);
1506         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1507         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1508
1509         ath10k_dbg(ar, ATH10K_DBG_HTT,
1510                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1511                    tid, peer_id, ev->window_size);
1512
1513         spin_lock_bh(&ar->data_lock);
1514         peer = ath10k_peer_find_by_id(ar, peer_id);
1515         if (!peer) {
1516                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1517                             peer_id);
1518                 spin_unlock_bh(&ar->data_lock);
1519                 return;
1520         }
1521
1522         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1523         if (!arvif) {
1524                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1525                             peer->vdev_id);
1526                 spin_unlock_bh(&ar->data_lock);
1527                 return;
1528         }
1529
1530         ath10k_dbg(ar, ATH10K_DBG_HTT,
1531                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1532                    peer->addr, tid, ev->window_size);
1533
1534         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1535         spin_unlock_bh(&ar->data_lock);
1536 }
1537
1538 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1539 {
1540         struct htt_rx_delba *ev = &resp->rx_delba;
1541         struct ath10k_peer *peer;
1542         struct ath10k_vif *arvif;
1543         u16 info0, tid, peer_id;
1544
1545         info0 = __le16_to_cpu(ev->info0);
1546         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1547         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1548
1549         ath10k_dbg(ar, ATH10K_DBG_HTT,
1550                    "htt rx delba tid %hu peer_id %hu\n",
1551                    tid, peer_id);
1552
1553         spin_lock_bh(&ar->data_lock);
1554         peer = ath10k_peer_find_by_id(ar, peer_id);
1555         if (!peer) {
1556                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1557                             peer_id);
1558                 spin_unlock_bh(&ar->data_lock);
1559                 return;
1560         }
1561
1562         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1563         if (!arvif) {
1564                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1565                             peer->vdev_id);
1566                 spin_unlock_bh(&ar->data_lock);
1567                 return;
1568         }
1569
1570         ath10k_dbg(ar, ATH10K_DBG_HTT,
1571                    "htt rx stop rx ba session sta %pM tid %hu\n",
1572                    peer->addr, tid);
1573
1574         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1575         spin_unlock_bh(&ar->data_lock);
1576 }
1577
1578 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
1579 {
1580         struct ath10k_htt *htt = &ar->htt;
1581         struct htt_resp *resp = (struct htt_resp *)skb->data;
1582
1583         /* confirm alignment */
1584         if (!IS_ALIGNED((unsigned long)skb->data, 4))
1585                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
1586
1587         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
1588                    resp->hdr.msg_type);
1589         switch (resp->hdr.msg_type) {
1590         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
1591                 htt->target_version_major = resp->ver_resp.major;
1592                 htt->target_version_minor = resp->ver_resp.minor;
1593                 complete(&htt->target_version_received);
1594                 break;
1595         }
1596         case HTT_T2H_MSG_TYPE_RX_IND:
1597                 spin_lock_bh(&htt->rx_ring.lock);
1598                 __skb_queue_tail(&htt->rx_compl_q, skb);
1599                 spin_unlock_bh(&htt->rx_ring.lock);
1600                 tasklet_schedule(&htt->txrx_compl_task);
1601                 return;
1602         case HTT_T2H_MSG_TYPE_PEER_MAP: {
1603                 struct htt_peer_map_event ev = {
1604                         .vdev_id = resp->peer_map.vdev_id,
1605                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
1606                 };
1607                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
1608                 ath10k_peer_map_event(htt, &ev);
1609                 break;
1610         }
1611         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
1612                 struct htt_peer_unmap_event ev = {
1613                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
1614                 };
1615                 ath10k_peer_unmap_event(htt, &ev);
1616                 break;
1617         }
1618         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
1619                 struct htt_tx_done tx_done = {};
1620                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
1621
1622                 tx_done.msdu_id =
1623                         __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
1624
1625                 switch (status) {
1626                 case HTT_MGMT_TX_STATUS_OK:
1627                         break;
1628                 case HTT_MGMT_TX_STATUS_RETRY:
1629                         tx_done.no_ack = true;
1630                         break;
1631                 case HTT_MGMT_TX_STATUS_DROP:
1632                         tx_done.discard = true;
1633                         break;
1634                 }
1635
1636                 spin_lock_bh(&htt->tx_lock);
1637                 ath10k_txrx_tx_unref(htt, &tx_done);
1638                 spin_unlock_bh(&htt->tx_lock);
1639                 break;
1640         }
1641         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
1642                 spin_lock_bh(&htt->tx_lock);
1643                 __skb_queue_tail(&htt->tx_compl_q, skb);
1644                 spin_unlock_bh(&htt->tx_lock);
1645                 tasklet_schedule(&htt->txrx_compl_task);
1646                 return;
1647         case HTT_T2H_MSG_TYPE_SEC_IND: {
1648                 struct ath10k *ar = htt->ar;
1649                 struct htt_security_indication *ev = &resp->security_indication;
1650
1651                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1652                            "sec ind peer_id %d unicast %d type %d\n",
1653                           __le16_to_cpu(ev->peer_id),
1654                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
1655                           MS(ev->flags, HTT_SECURITY_TYPE));
1656                 complete(&ar->install_key_done);
1657                 break;
1658         }
1659         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
1660                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1661                                 skb->data, skb->len);
1662                 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
1663                 break;
1664         }
1665         case HTT_T2H_MSG_TYPE_TEST:
1666                 /* FIX THIS */
1667                 break;
1668         case HTT_T2H_MSG_TYPE_STATS_CONF:
1669                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
1670                 break;
1671         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
1672                 /* Firmware can return tx frames if it's unable to fully
1673                  * process them and suspects host may be able to fix it. ath10k
1674                  * sends all tx frames as already inspected so this shouldn't
1675                  * happen unless fw has a bug.
1676                  */
1677                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
1678                 break;
1679         case HTT_T2H_MSG_TYPE_RX_ADDBA:
1680                 ath10k_htt_rx_addba(ar, resp);
1681                 break;
1682         case HTT_T2H_MSG_TYPE_RX_DELBA:
1683                 ath10k_htt_rx_delba(ar, resp);
1684                 break;
1685         case HTT_T2H_MSG_TYPE_PKTLOG: {
1686                 struct ath10k_pktlog_hdr *hdr =
1687                         (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;
1688
1689                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
1690                                         sizeof(*hdr) +
1691                                         __le16_to_cpu(hdr->size));
1692                 break;
1693         }
1694         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
1695                 /* Ignore this event because mac80211 takes care of Rx
1696                  * aggregation reordering.
1697                  */
1698                 break;
1699         }
1700         default:
1701                 ath10k_warn(ar, "htt event (%d) not handled\n",
1702                             resp->hdr.msg_type);
1703                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1704                                 skb->data, skb->len);
1705                 break;
1706         };
1707
1708         /* Free the indication buffer */
1709         dev_kfree_skb_any(skb);
1710 }
1711
1712 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
1713 {
1714         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
1715         struct htt_resp *resp;
1716         struct sk_buff *skb;
1717
1718         spin_lock_bh(&htt->tx_lock);
1719         while ((skb = __skb_dequeue(&htt->tx_compl_q))) {
1720                 ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
1721                 dev_kfree_skb_any(skb);
1722         }
1723         spin_unlock_bh(&htt->tx_lock);
1724
1725         spin_lock_bh(&htt->rx_ring.lock);
1726         while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
1727                 resp = (struct htt_resp *)skb->data;
1728                 ath10k_htt_rx_handler(htt, &resp->rx_ind);
1729                 dev_kfree_skb_any(skb);
1730         }
1731         spin_unlock_bh(&htt->rx_ring.lock);
1732 }