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         trace_ath10k_htt_rx_pop_msdu(ar, msdu->data, msdu->len +
 295                                      skb_tailroom(msdu));
 296
 297         return msdu;
 298 }
 299
 300 static void ath10k_htt_rx_free_msdu_chain(struct sk_buff *skb)
 301 {
 302         struct sk_buff *next;
 303
 304         while (skb) {
 305                 next = skb->next;
 306                 dev_kfree_skb_any(skb);
 307                 skb = next;
 308         }
 309 }
 310
 311 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 312 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 313                                    u8 **fw_desc, int *fw_desc_len,
 314                                    struct sk_buff **head_msdu,
 315                                    struct sk_buff **tail_msdu,
 316                                    u32 *attention)
 317 {
 318         struct ath10k *ar = htt->ar;
 319         int msdu_len, msdu_chaining = 0;
 320         struct sk_buff *msdu, *next;
 321         struct htt_rx_desc *rx_desc;
 322         u32 tsf;
 323
 324         lockdep_assert_held(&htt->rx_ring.lock);
 325
 326         if (htt->rx_confused) {
 327                 ath10k_warn(ar, "htt is confused. refusing rx\n");
 328                 return -1;
 329         }
 330
 331         msdu = *head_msdu = ath10k_htt_rx_netbuf_pop(htt);
 332         while (msdu) {
 333                 int last_msdu, msdu_len_invalid, msdu_chained;
 334
 335                 dma_unmap_single(htt->ar->dev,
 336                                  ATH10K_SKB_CB(msdu)->paddr,
 337                                  msdu->len + skb_tailroom(msdu),
 338                                  DMA_FROM_DEVICE);
 339
 340                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx pop: ",
 341                                 msdu->data, msdu->len + skb_tailroom(msdu));
 342
 343                 rx_desc = (struct htt_rx_desc *)msdu->data;
 344
 345                 /* FIXME: we must report msdu payload since this is what caller
 346                  *        expects now */
 347                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 348                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 349
 350                 /*
 351                  * Sanity check - confirm the HW is finished filling in the
 352                  * rx data.
 353                  * If the HW and SW are working correctly, then it's guaranteed
 354                  * that the HW's MAC DMA is done before this point in the SW.
 355                  * To prevent the case that we handle a stale Rx descriptor,
 356                  * just assert for now until we have a way to recover.
 357                  */
 358                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 359                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 360                         ath10k_htt_rx_free_msdu_chain(*head_msdu);
 361                         *head_msdu = NULL;
 362                         msdu = NULL;
 363                         ath10k_err(ar, "htt rx stopped. cannot recover\n");
 364                         htt->rx_confused = true;
 365                         break;
 366                 }
 367
 368                 *attention |= __le32_to_cpu(rx_desc->attention.flags) &
 369                                             (RX_ATTENTION_FLAGS_TKIP_MIC_ERR |
 370                                              RX_ATTENTION_FLAGS_DECRYPT_ERR |
 371                                              RX_ATTENTION_FLAGS_FCS_ERR |
 372                                              RX_ATTENTION_FLAGS_MGMT_TYPE);
 373                 /*
 374                  * Copy the FW rx descriptor for this MSDU from the rx
 375                  * indication message into the MSDU's netbuf. HL uses the
 376                  * same rx indication message definition as LL, and simply
 377                  * appends new info (fields from the HW rx desc, and the
 378                  * MSDU payload itself). So, the offset into the rx
 379                  * indication message only has to account for the standard
 380                  * offset of the per-MSDU FW rx desc info within the
 381                  * message, and how many bytes of the per-MSDU FW rx desc
 382                  * info have already been consumed. (And the endianness of
 383                  * the host, since for a big-endian host, the rx ind
 384                  * message contents, including the per-MSDU rx desc bytes,
 385                  * were byteswapped during upload.)
 386                  */
 387                 if (*fw_desc_len > 0) {
 388                         rx_desc->fw_desc.info0 = **fw_desc;
 389                         /*
 390                          * The target is expected to only provide the basic
 391                          * per-MSDU rx descriptors. Just to be sure, verify
 392                          * that the target has not attached extension data
 393                          * (e.g. LRO flow ID).
 394                          */
 395
 396                         /* or more, if there's extension data */
 397                         (*fw_desc)++;
 398                         (*fw_desc_len)--;
 399                 } else {
 400                         /*
 401                          * When an oversized AMSDU happened, FW will lost
 402                          * some of MSDU status - in this case, the FW
 403                          * descriptors provided will be less than the
 404                          * actual MSDUs inside this MPDU. Mark the FW
 405                          * descriptors so that it will still deliver to
 406                          * upper stack, if no CRC error for this MPDU.
 407                          *
 408                          * FIX THIS - the FW descriptors are actually for
 409                          * MSDUs in the end of this A-MSDU instead of the
 410                          * beginning.
 411                          */
 412                         rx_desc->fw_desc.info0 = 0;
 413                 }
 414
 415                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 416                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 417                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 418                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0),
 419                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 420                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 421
 422                 if (msdu_len_invalid)
 423                         msdu_len = 0;
 424
 425                 skb_trim(msdu, 0);
 426                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 427                 msdu_len -= msdu->len;
 428
 429                 /* FIXME: Do chained buffers include htt_rx_desc or not? */
 430                 while (msdu_chained--) {
 431                         struct sk_buff *next = ath10k_htt_rx_netbuf_pop(htt);
 432
 433                         dma_unmap_single(htt->ar->dev,
 434                                          ATH10K_SKB_CB(next)->paddr,
 435                                          next->len + skb_tailroom(next),
 436                                          DMA_FROM_DEVICE);
 437
 438                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
 439                                         "htt rx chained: ", next->data,
 440                                         next->len + skb_tailroom(next));
 441
 442                         skb_trim(next, 0);
 443                         skb_put(next, min(msdu_len, HTT_RX_BUF_SIZE));
 444                         msdu_len -= next->len;
 445
 446                         msdu->next = next;
 447                         msdu = next;
 448                         msdu_chaining = 1;
 449                 }
 450
 451                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) &
 452                                 RX_MSDU_END_INFO0_LAST_MSDU;
 453
 454                 tsf = __le32_to_cpu(rx_desc->ppdu_end.tsf_timestamp);
 455                 trace_ath10k_htt_rx_desc(ar, tsf, &rx_desc->attention,
 456                                          sizeof(*rx_desc) - sizeof(u32));
 457                 if (last_msdu) {
 458                         msdu->next = NULL;
 459                         break;
 460                 }
 461
 462                 next = ath10k_htt_rx_netbuf_pop(htt);
 463                 msdu->next = next;
 464                 msdu = next;
 465         }
 466         *tail_msdu = msdu;
 467
 468         if (*head_msdu == NULL)
 469                 msdu_chaining = -1;
 470
 471         /*
 472          * Don't refill the ring yet.
 473          *
 474          * First, the elements popped here are still in use - it is not
 475          * safe to overwrite them until the matching call to
 476          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 477          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 478          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 479          * (something like 3 buffers). Consequently, we'll rely on the txrx
 480          * SW to tell us when it is done pulling all the PPDU's rx buffers
 481          * out of the rx ring, and then refill it just once.
 482          */
 483
 484         return msdu_chaining;
 485 }
 486
 487 static void ath10k_htt_rx_replenish_task(unsigned long ptr)
 488 {
 489         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
 490
 491         ath10k_htt_rx_msdu_buff_replenish(htt);
 492 }
 493
 494 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 495 {
 496         struct ath10k *ar = htt->ar;
 497         dma_addr_t paddr;
 498         void *vaddr;
 499         size_t size;
 500         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 501
 502         htt->rx_ring.size = ath10k_htt_rx_ring_size(htt);
 503         if (!is_power_of_2(htt->rx_ring.size)) {
 504                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 505                 return -EINVAL;
 506         }
 507
 508         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 509
 510         /*
 511          * Set the initial value for the level to which the rx ring
 512          * should be filled, based on the max throughput and the
 513          * worst likely latency for the host to fill the rx ring
 514          * with new buffers. In theory, this fill level can be
 515          * dynamically adjusted from the initial value set here, to
 516          * reflect the actual host latency rather than a
 517          * conservative assumption about the host latency.
 518          */
 519         htt->rx_ring.fill_level = ath10k_htt_rx_ring_fill_level(htt);
 520
 521         htt->rx_ring.netbufs_ring =
 522                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 523                         GFP_KERNEL);
 524         if (!htt->rx_ring.netbufs_ring)
 525                 goto err_netbuf;
 526
 527         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 528
 529         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
 530         if (!vaddr)
 531                 goto err_dma_ring;
 532
 533         htt->rx_ring.paddrs_ring = vaddr;
 534         htt->rx_ring.base_paddr = paddr;
 535
 536         vaddr = dma_alloc_coherent(htt->ar->dev,
 537                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 538                                    &paddr, GFP_DMA);
 539         if (!vaddr)
 540                 goto err_dma_idx;
 541
 542         htt->rx_ring.alloc_idx.vaddr = vaddr;
 543         htt->rx_ring.alloc_idx.paddr = paddr;
 544         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 545         *htt->rx_ring.alloc_idx.vaddr = 0;
 546
 547         /* Initialize the Rx refill retry timer */
 548         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 549
 550         spin_lock_init(&htt->rx_ring.lock);
 551
 552         htt->rx_ring.fill_cnt = 0;
 553         if (__ath10k_htt_rx_ring_fill_n(htt, htt->rx_ring.fill_level))
 554                 goto err_fill_ring;
 555
 556         tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
 557                      (unsigned long)htt);
 558
 559         skb_queue_head_init(&htt->tx_compl_q);
 560         skb_queue_head_init(&htt->rx_compl_q);
 561
 562         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 563                      (unsigned long)htt);
 564
 565         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 566                    htt->rx_ring.size, htt->rx_ring.fill_level);
 567         return 0;
 568
 569 err_fill_ring:
 570         ath10k_htt_rx_ring_free(htt);
 571         dma_free_coherent(htt->ar->dev,
 572                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 573                           htt->rx_ring.alloc_idx.vaddr,
 574                           htt->rx_ring.alloc_idx.paddr);
 575 err_dma_idx:
 576         dma_free_coherent(htt->ar->dev,
 577                           (htt->rx_ring.size *
 578                            sizeof(htt->rx_ring.paddrs_ring)),
 579                           htt->rx_ring.paddrs_ring,
 580                           htt->rx_ring.base_paddr);
 581 err_dma_ring:
 582         kfree(htt->rx_ring.netbufs_ring);
 583 err_netbuf:
 584         return -ENOMEM;
 585 }
 586
 587 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 588                                           enum htt_rx_mpdu_encrypt_type type)
 589 {
 590         switch (type) {
 591         case HTT_RX_MPDU_ENCRYPT_NONE:
 592                 return 0;
 593         case HTT_RX_MPDU_ENCRYPT_WEP40:
 594         case HTT_RX_MPDU_ENCRYPT_WEP104:
 595                 return IEEE80211_WEP_IV_LEN;
 596         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 597         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 598                 return IEEE80211_TKIP_IV_LEN;
 599         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 600                 return IEEE80211_CCMP_HDR_LEN;
 601         case HTT_RX_MPDU_ENCRYPT_WEP128:
 602         case HTT_RX_MPDU_ENCRYPT_WAPI:
 603                 break;
 604         }
 605
 606         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 607         return 0;
 608 }
 609
 610 #define MICHAEL_MIC_LEN 8
 611
 612 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 613                                          enum htt_rx_mpdu_encrypt_type type)
 614 {
 615         switch (type) {
 616         case HTT_RX_MPDU_ENCRYPT_NONE:
 617                 return 0;
 618         case HTT_RX_MPDU_ENCRYPT_WEP40:
 619         case HTT_RX_MPDU_ENCRYPT_WEP104:
 620                 return IEEE80211_WEP_ICV_LEN;
 621         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 622         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 623                 return IEEE80211_TKIP_ICV_LEN;
 624         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 625                 return IEEE80211_CCMP_MIC_LEN;
 626         case HTT_RX_MPDU_ENCRYPT_WEP128:
 627         case HTT_RX_MPDU_ENCRYPT_WAPI:
 628                 break;
 629         }
 630
 631         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 632         return 0;
 633 }
 634
 635 /* Applies for first msdu in chain, before altering it. */
 636 static struct ieee80211_hdr *ath10k_htt_rx_skb_get_hdr(struct sk_buff *skb)
 637 {
 638         struct htt_rx_desc *rxd;
 639         enum rx_msdu_decap_format fmt;
 640
 641         rxd = (void *)skb->data - sizeof(*rxd);
 642         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 643                  RX_MSDU_START_INFO1_DECAP_FORMAT);
 644
 645         if (fmt == RX_MSDU_DECAP_RAW)
 646                 return (void *)skb->data;
 647
 648         return (void *)skb->data - RX_HTT_HDR_STATUS_LEN;
 649 }
 650
 651 /* This function only applies for first msdu in an msdu chain */
 652 static bool ath10k_htt_rx_hdr_is_amsdu(struct ieee80211_hdr *hdr)
 653 {
 654         u8 *qc;
 655
 656         if (ieee80211_is_data_qos(hdr->frame_control)) {
 657                 qc = ieee80211_get_qos_ctl(hdr);
 658                 if (qc[0] & 0x80)
 659                         return true;
 660         }
 661         return false;
 662 }
 663
 664 struct rfc1042_hdr {
 665         u8 llc_dsap;
 666         u8 llc_ssap;
 667         u8 llc_ctrl;
 668         u8 snap_oui[3];
 669         __be16 snap_type;
 670 } __packed;
 671
 672 struct amsdu_subframe_hdr {
 673         u8 dst[ETH_ALEN];
 674         u8 src[ETH_ALEN];
 675         __be16 len;
 676 } __packed;
 677
 678 static const u8 rx_legacy_rate_idx[] = {
 679         3,      /* 0x00  - 11Mbps  */
 680         2,      /* 0x01  - 5.5Mbps */
 681         1,      /* 0x02  - 2Mbps   */
 682         0,      /* 0x03  - 1Mbps   */
 683         3,      /* 0x04  - 11Mbps  */
 684         2,      /* 0x05  - 5.5Mbps */
 685         1,      /* 0x06  - 2Mbps   */
 686         0,      /* 0x07  - 1Mbps   */
 687         10,     /* 0x08  - 48Mbps  */
 688         8,      /* 0x09  - 24Mbps  */
 689         6,      /* 0x0A  - 12Mbps  */
 690         4,      /* 0x0B  - 6Mbps   */
 691         11,     /* 0x0C  - 54Mbps  */
 692         9,      /* 0x0D  - 36Mbps  */
 693         7,      /* 0x0E  - 18Mbps  */
 694         5,      /* 0x0F  - 9Mbps   */
 695 };
 696
 697 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 698                                   enum ieee80211_band band,
 699                                   u8 info0, u32 info1, u32 info2,
 700                                   struct ieee80211_rx_status *status)
 701 {
 702         u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
 703         u8 preamble = 0;
 704
 705         /* Check if valid fields */
 706         if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
 707                 return;
 708
 709         preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
 710
 711         switch (preamble) {
 712         case HTT_RX_LEGACY:
 713                 cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
 714                 rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
 715                 rate_idx = 0;
 716
 717                 if (rate < 0x08 || rate > 0x0F)
 718                         break;
 719
 720                 switch (band) {
 721                 case IEEE80211_BAND_2GHZ:
 722                         if (cck)
 723                                 rate &= ~BIT(3);
 724                         rate_idx = rx_legacy_rate_idx[rate];
 725                         break;
 726                 case IEEE80211_BAND_5GHZ:
 727                         rate_idx = rx_legacy_rate_idx[rate];
 728                         /* We are using same rate table registering
 729                            HW - ath10k_rates[]. In case of 5GHz skip
 730                            CCK rates, so -4 here */
 731                         rate_idx -= 4;
 732                         break;
 733                 default:
 734                         break;
 735                 }
 736
 737                 status->rate_idx = rate_idx;
 738                 break;
 739         case HTT_RX_HT:
 740         case HTT_RX_HT_WITH_TXBF:
 741                 /* HT-SIG - Table 20-11 in info1 and info2 */
 742                 mcs = info1 & 0x1F;
 743                 nss = mcs >> 3;
 744                 bw = (info1 >> 7) & 1;
 745                 sgi = (info2 >> 7) & 1;
 746
 747                 status->rate_idx = mcs;
 748                 status->flag |= RX_FLAG_HT;
 749                 if (sgi)
 750                         status->flag |= RX_FLAG_SHORT_GI;
 751                 if (bw)
 752                         status->flag |= RX_FLAG_40MHZ;
 753                 break;
 754         case HTT_RX_VHT:
 755         case HTT_RX_VHT_WITH_TXBF:
 756                 /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
 757                    TODO check this */
 758                 mcs = (info2 >> 4) & 0x0F;
 759                 nss = ((info1 >> 10) & 0x07) + 1;
 760                 bw = info1 & 3;
 761                 sgi = info2 & 1;
 762
 763                 status->rate_idx = mcs;
 764                 status->vht_nss = nss;
 765
 766                 if (sgi)
 767                         status->flag |= RX_FLAG_SHORT_GI;
 768
 769                 switch (bw) {
 770                 /* 20MHZ */
 771                 case 0:
 772                         break;
 773                 /* 40MHZ */
 774                 case 1:
 775                         status->flag |= RX_FLAG_40MHZ;
 776                         break;
 777                 /* 80MHZ */
 778                 case 2:
 779                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 780                 }
 781
 782                 status->flag |= RX_FLAG_VHT;
 783                 break;
 784         default:
 785                 break;
 786         }
 787 }
 788
 789 static void ath10k_htt_rx_h_protected(struct ath10k_htt *htt,
 790                                       struct ieee80211_rx_status *rx_status,
 791                                       struct sk_buff *skb,
 792                                       enum htt_rx_mpdu_encrypt_type enctype,
 793                                       enum rx_msdu_decap_format fmt,
 794                                       bool dot11frag)
 795 {
 796         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 797
 798         rx_status->flag &= ~(RX_FLAG_DECRYPTED |
 799                              RX_FLAG_IV_STRIPPED |
 800                              RX_FLAG_MMIC_STRIPPED);
 801
 802         if (enctype == HTT_RX_MPDU_ENCRYPT_NONE)
 803                 return;
 804
 805         /*
 806          * There's no explicit rx descriptor flag to indicate whether a given
 807          * frame has been decrypted or not. We're forced to use the decap
 808          * format as an implicit indication. However fragmentation rx is always
 809          * raw and it probably never reports undecrypted raws.
 810          *
 811          * This makes sure sniffed frames are reported as-is without stripping
 812          * the protected flag.
 813          */
 814         if (fmt == RX_MSDU_DECAP_RAW && !dot11frag)
 815                 return;
 816
 817         rx_status->flag |= RX_FLAG_DECRYPTED |
 818                            RX_FLAG_IV_STRIPPED |
 819                            RX_FLAG_MMIC_STRIPPED;
 820         hdr->frame_control = __cpu_to_le16(__le16_to_cpu(hdr->frame_control) &
 821                                            ~IEEE80211_FCTL_PROTECTED);
 822 }
 823
 824 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 825                                     struct ieee80211_rx_status *status)
 826 {
 827         struct ieee80211_channel *ch;
 828
 829         spin_lock_bh(&ar->data_lock);
 830         ch = ar->scan_channel;
 831         if (!ch)
 832                 ch = ar->rx_channel;
 833         spin_unlock_bh(&ar->data_lock);
 834
 835         if (!ch)
 836                 return false;
 837
 838         status->band = ch->band;
 839         status->freq = ch->center_freq;
 840
 841         return true;
 842 }
 843
 844 static const char * const tid_to_ac[] = {
 845         "BE",
 846         "BK",
 847         "BK",
 848         "BE",
 849         "VI",
 850         "VI",
 851         "VO",
 852         "VO",
 853 };
 854
 855 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 856 {
 857         u8 *qc;
 858         int tid;
 859
 860         if (!ieee80211_is_data_qos(hdr->frame_control))
 861                 return "";
 862
 863         qc = ieee80211_get_qos_ctl(hdr);
 864         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 865         if (tid < 8)
 866                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 867         else
 868                 snprintf(out, size, "tid %d", tid);
 869
 870         return out;
 871 }
 872
 873 static void ath10k_process_rx(struct ath10k *ar,
 874                               struct ieee80211_rx_status *rx_status,
 875                               struct sk_buff *skb)
 876 {
 877         struct ieee80211_rx_status *status;
 878         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 879         char tid[32];
 880
 881         status = IEEE80211_SKB_RXCB(skb);
 882         *status = *rx_status;
 883
 884         ath10k_dbg(ar, ATH10K_DBG_DATA,
 885                    "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",
 886                    skb,
 887                    skb->len,
 888                    ieee80211_get_SA(hdr),
 889                    ath10k_get_tid(hdr, tid, sizeof(tid)),
 890                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
 891                                                         "mcast" : "ucast",
 892                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
 893                    status->flag == 0 ? "legacy" : "",
 894                    status->flag & RX_FLAG_HT ? "ht" : "",
 895                    status->flag & RX_FLAG_VHT ? "vht" : "",
 896                    status->flag & RX_FLAG_40MHZ ? "40" : "",
 897                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
 898                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
 899                    status->rate_idx,
 900                    status->vht_nss,
 901                    status->freq,
 902                    status->band, status->flag,
 903                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
 904                    !!(status->flag & RX_FLAG_MMIC_ERROR),
 905                    !!(status->flag & RX_FLAG_AMSDU_MORE));
 906         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
 907                         skb->data, skb->len);
 908
 909         ieee80211_rx(ar->hw, skb);
 910 }
 911
 912 static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr)
 913 {
 914         /* nwifi header is padded to 4 bytes. this fixes 4addr rx */
 915         return round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 916 }
 917
 918 static void ath10k_htt_rx_amsdu(struct ath10k_htt *htt,
 919                                 struct ieee80211_rx_status *rx_status,
 920                                 struct sk_buff *skb_in)
 921 {
 922         struct ath10k *ar = htt->ar;
 923         struct htt_rx_desc *rxd;
 924         struct sk_buff *skb = skb_in;
 925         struct sk_buff *first;
 926         enum rx_msdu_decap_format fmt;
 927         enum htt_rx_mpdu_encrypt_type enctype;
 928         struct ieee80211_hdr *hdr;
 929         u8 hdr_buf[64], da[ETH_ALEN], sa[ETH_ALEN], *qos;
 930         unsigned int hdr_len;
 931
 932         rxd = (void *)skb->data - sizeof(*rxd);
 933         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 934                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
 935
 936         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
 937         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 938         memcpy(hdr_buf, hdr, hdr_len);
 939         hdr = (struct ieee80211_hdr *)hdr_buf;
 940
 941         first = skb;
 942         while (skb) {
 943                 void *decap_hdr;
 944                 int len;
 945
 946                 rxd = (void *)skb->data - sizeof(*rxd);
 947                 fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 948                          RX_MSDU_START_INFO1_DECAP_FORMAT);
 949                 decap_hdr = (void *)rxd->rx_hdr_status;
 950
 951                 skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
 952
 953                 /* First frame in an A-MSDU chain has more decapped data. */
 954                 if (skb == first) {
 955                         len = round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 956                         len += round_up(ath10k_htt_rx_crypto_param_len(ar,
 957                                                 enctype), 4);
 958                         decap_hdr += len;
 959                 }
 960
 961                 switch (fmt) {
 962                 case RX_MSDU_DECAP_RAW:
 963                         /* remove trailing FCS */
 964                         skb_trim(skb, skb->len - FCS_LEN);
 965                         break;
 966                 case RX_MSDU_DECAP_NATIVE_WIFI:
 967                         /* pull decapped header and copy SA & DA */
 968                         hdr = (struct ieee80211_hdr *)skb->data;
 969                         hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
 970                         ether_addr_copy(da, ieee80211_get_DA(hdr));
 971                         ether_addr_copy(sa, ieee80211_get_SA(hdr));
 972                         skb_pull(skb, hdr_len);
 973
 974                         /* push original 802.11 header */
 975                         hdr = (struct ieee80211_hdr *)hdr_buf;
 976                         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 977                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 978
 979                         /* original A-MSDU header has the bit set but we're
 980                          * not including A-MSDU subframe header */
 981                         hdr = (struct ieee80211_hdr *)skb->data;
 982                         qos = ieee80211_get_qos_ctl(hdr);
 983                         qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 984
 985                         /* original 802.11 header has a different DA and in
 986                          * case of 4addr it may also have different SA
 987                          */
 988                         ether_addr_copy(ieee80211_get_DA(hdr), da);
 989                         ether_addr_copy(ieee80211_get_SA(hdr), sa);
 990                         break;
 991                 case RX_MSDU_DECAP_ETHERNET2_DIX:
 992                         /* strip ethernet header and insert decapped 802.11
 993                          * header, amsdu subframe header and rfc1042 header */
 994
 995                         len = 0;
 996                         len += sizeof(struct rfc1042_hdr);
 997                         len += sizeof(struct amsdu_subframe_hdr);
 998
 999                         skb_pull(skb, sizeof(struct ethhdr));
1000                         memcpy(skb_push(skb, len), decap_hdr, len);
1001                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1002                         break;
1003                 case RX_MSDU_DECAP_8023_SNAP_LLC:
1004                         /* insert decapped 802.11 header making a singly
1005                          * A-MSDU */
1006                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1007                         break;
1008                 }
1009
1010                 skb_in = skb;
1011                 ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype, fmt,
1012                                           false);
1013                 skb = skb->next;
1014                 skb_in->next = NULL;
1015
1016                 if (skb)
1017                         rx_status->flag |= RX_FLAG_AMSDU_MORE;
1018                 else
1019                         rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
1020
1021                 ath10k_process_rx(htt->ar, rx_status, skb_in);
1022         }
1023
1024         /* FIXME: It might be nice to re-assemble the A-MSDU when there's a
1025          * monitor interface active for sniffing purposes. */
1026 }
1027
1028 static void ath10k_htt_rx_msdu(struct ath10k_htt *htt,
1029                                struct ieee80211_rx_status *rx_status,
1030                                struct sk_buff *skb)
1031 {
1032         struct ath10k *ar = htt->ar;
1033         struct htt_rx_desc *rxd;
1034         struct ieee80211_hdr *hdr;
1035         enum rx_msdu_decap_format fmt;
1036         enum htt_rx_mpdu_encrypt_type enctype;
1037         int hdr_len;
1038         void *rfc1042;
1039
1040         /* This shouldn't happen. If it does than it may be a FW bug. */
1041         if (skb->next) {
1042                 ath10k_warn(ar, "htt rx received chained non A-MSDU frame\n");
1043                 ath10k_htt_rx_free_msdu_chain(skb->next);
1044                 skb->next = NULL;
1045         }
1046
1047         rxd = (void *)skb->data - sizeof(*rxd);
1048         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1049                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1050         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1051                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1052         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1053         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1054
1055         skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
1056
1057         switch (fmt) {
1058         case RX_MSDU_DECAP_RAW:
1059                 /* remove trailing FCS */
1060                 skb_trim(skb, skb->len - FCS_LEN);
1061                 break;
1062         case RX_MSDU_DECAP_NATIVE_WIFI:
1063                 /* Pull decapped header */
1064                 hdr = (struct ieee80211_hdr *)skb->data;
1065                 hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
1066                 skb_pull(skb, hdr_len);
1067
1068                 /* Push original header */
1069                 hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1070                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1071                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1072                 break;
1073         case RX_MSDU_DECAP_ETHERNET2_DIX:
1074                 /* strip ethernet header and insert decapped 802.11 header and
1075                  * rfc1042 header */
1076
1077                 rfc1042 = hdr;
1078                 rfc1042 += roundup(hdr_len, 4);
1079                 rfc1042 += roundup(ath10k_htt_rx_crypto_param_len(ar,
1080                                         enctype), 4);
1081
1082                 skb_pull(skb, sizeof(struct ethhdr));
1083                 memcpy(skb_push(skb, sizeof(struct rfc1042_hdr)),
1084                        rfc1042, sizeof(struct rfc1042_hdr));
1085                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1086                 break;
1087         case RX_MSDU_DECAP_8023_SNAP_LLC:
1088                 /* remove A-MSDU subframe header and insert
1089                  * decapped 802.11 header. rfc1042 header is already there */
1090
1091                 skb_pull(skb, sizeof(struct amsdu_subframe_hdr));
1092                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1093                 break;
1094         }
1095
1096         ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype, fmt, false);
1097
1098         ath10k_process_rx(htt->ar, rx_status, skb);
1099 }
1100
1101 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1102 {
1103         struct htt_rx_desc *rxd;
1104         u32 flags, info;
1105         bool is_ip4, is_ip6;
1106         bool is_tcp, is_udp;
1107         bool ip_csum_ok, tcpudp_csum_ok;
1108
1109         rxd = (void *)skb->data - sizeof(*rxd);
1110         flags = __le32_to_cpu(rxd->attention.flags);
1111         info = __le32_to_cpu(rxd->msdu_start.info1);
1112
1113         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1114         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1115         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1116         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1117         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1118         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1119
1120         if (!is_ip4 && !is_ip6)
1121                 return CHECKSUM_NONE;
1122         if (!is_tcp && !is_udp)
1123                 return CHECKSUM_NONE;
1124         if (!ip_csum_ok)
1125                 return CHECKSUM_NONE;
1126         if (!tcpudp_csum_ok)
1127                 return CHECKSUM_NONE;
1128
1129         return CHECKSUM_UNNECESSARY;
1130 }
1131
1132 static int ath10k_unchain_msdu(struct sk_buff *msdu_head)
1133 {
1134         struct sk_buff *next = msdu_head->next;
1135         struct sk_buff *to_free = next;
1136         int space;
1137         int total_len = 0;
1138
1139         /* TODO:  Might could optimize this by using
1140          * skb_try_coalesce or similar method to
1141          * decrease copying, or maybe get mac80211 to
1142          * provide a way to just receive a list of
1143          * skb?
1144          */
1145
1146         msdu_head->next = NULL;
1147
1148         /* Allocate total length all at once. */
1149         while (next) {
1150                 total_len += next->len;
1151                 next = next->next;
1152         }
1153
1154         space = total_len - skb_tailroom(msdu_head);
1155         if ((space > 0) &&
1156             (pskb_expand_head(msdu_head, 0, space, GFP_ATOMIC) < 0)) {
1157                 /* TODO:  bump some rx-oom error stat */
1158                 /* put it back together so we can free the
1159                  * whole list at once.
1160                  */
1161                 msdu_head->next = to_free;
1162                 return -1;
1163         }
1164
1165         /* Walk list again, copying contents into
1166          * msdu_head
1167          */
1168         next = to_free;
1169         while (next) {
1170                 skb_copy_from_linear_data(next, skb_put(msdu_head, next->len),
1171                                           next->len);
1172                 next = next->next;
1173         }
1174
1175         /* If here, we have consolidated skb.  Free the
1176          * fragments and pass the main skb on up the
1177          * stack.
1178          */
1179         ath10k_htt_rx_free_msdu_chain(to_free);
1180         return 0;
1181 }
1182
1183 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k_htt *htt,
1184                                         struct sk_buff *head,
1185                                         enum htt_rx_mpdu_status status,
1186                                         bool channel_set,
1187                                         u32 attention)
1188 {
1189         struct ath10k *ar = htt->ar;
1190
1191         if (head->len == 0) {
1192                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1193                            "htt rx dropping due to zero-len\n");
1194                 return false;
1195         }
1196
1197         if (attention & RX_ATTENTION_FLAGS_DECRYPT_ERR) {
1198                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1199                            "htt rx dropping due to decrypt-err\n");
1200                 return false;
1201         }
1202
1203         if (!channel_set) {
1204                 ath10k_warn(ar, "no channel configured; ignoring frame!\n");
1205                 return false;
1206         }
1207
1208         /* Skip mgmt frames while we handle this in WMI */
1209         if (attention & RX_ATTENTION_FLAGS_MGMT_TYPE) {
1210                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1211                 return false;
1212         }
1213
1214         if (status != HTT_RX_IND_MPDU_STATUS_OK &&
1215             status != HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR &&
1216             status != HTT_RX_IND_MPDU_STATUS_ERR_INV_PEER &&
1217             !htt->ar->monitor_started) {
1218                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1219                            "htt rx ignoring frame w/ status %d\n",
1220                            status);
1221                 return false;
1222         }
1223
1224         if (test_bit(ATH10K_CAC_RUNNING, &htt->ar->dev_flags)) {
1225                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1226                            "htt rx CAC running\n");
1227                 return false;
1228         }
1229
1230         return true;
1231 }
1232
1233 static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
1234                                   struct htt_rx_indication *rx)
1235 {
1236         struct ath10k *ar = htt->ar;
1237         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1238         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1239         enum htt_rx_mpdu_status status;
1240         struct ieee80211_hdr *hdr;
1241         int num_mpdu_ranges;
1242         u32 attention;
1243         int fw_desc_len;
1244         u8 *fw_desc;
1245         bool channel_set;
1246         int i, j;
1247         int ret;
1248
1249         lockdep_assert_held(&htt->rx_ring.lock);
1250
1251         fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
1252         fw_desc = (u8 *)&rx->fw_desc;
1253
1254         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1255                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1256         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1257
1258         /* Fill this once, while this is per-ppdu */
1259         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_START_VALID) {
1260                 memset(rx_status, 0, sizeof(*rx_status));
1261                 rx_status->signal  = ATH10K_DEFAULT_NOISE_FLOOR +
1262                                      rx->ppdu.combined_rssi;
1263         }
1264
1265         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_END_VALID) {
1266                 /* TSF available only in 32-bit */
1267                 rx_status->mactime = __le32_to_cpu(rx->ppdu.tsf) & 0xffffffff;
1268                 rx_status->flag |= RX_FLAG_MACTIME_END;
1269         }
1270
1271         channel_set = ath10k_htt_rx_h_channel(htt->ar, rx_status);
1272
1273         if (channel_set) {
1274                 ath10k_htt_rx_h_rates(htt->ar, rx_status->band,
1275                                       rx->ppdu.info0,
1276                                       __le32_to_cpu(rx->ppdu.info1),
1277                                       __le32_to_cpu(rx->ppdu.info2),
1278                                       rx_status);
1279         }
1280
1281         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1282                         rx, sizeof(*rx) +
1283                         (sizeof(struct htt_rx_indication_mpdu_range) *
1284                                 num_mpdu_ranges));
1285
1286         for (i = 0; i < num_mpdu_ranges; i++) {
1287                 status = mpdu_ranges[i].mpdu_range_status;
1288
1289                 for (j = 0; j < mpdu_ranges[i].mpdu_count; j++) {
1290                         struct sk_buff *msdu_head, *msdu_tail;
1291
1292                         attention = 0;
1293                         msdu_head = NULL;
1294                         msdu_tail = NULL;
1295                         ret = ath10k_htt_rx_amsdu_pop(htt,
1296                                                       &fw_desc,
1297                                                       &fw_desc_len,
1298                                                       &msdu_head,
1299                                                       &msdu_tail,
1300                                                       &attention);
1301
1302                         if (ret < 0) {
1303                                 ath10k_warn(ar, "failed to pop amsdu from htt rx ring %d\n",
1304                                             ret);
1305                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1306                                 continue;
1307                         }
1308
1309                         if (!ath10k_htt_rx_amsdu_allowed(htt, msdu_head,
1310                                                          status,
1311                                                          channel_set,
1312                                                          attention)) {
1313                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1314                                 continue;
1315                         }
1316
1317                         if (ret > 0 &&
1318                             ath10k_unchain_msdu(msdu_head) < 0) {
1319                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1320                                 continue;
1321                         }
1322
1323                         if (attention & RX_ATTENTION_FLAGS_FCS_ERR)
1324                                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1325                         else
1326                                 rx_status->flag &= ~RX_FLAG_FAILED_FCS_CRC;
1327
1328                         if (attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR)
1329                                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
1330                         else
1331                                 rx_status->flag &= ~RX_FLAG_MMIC_ERROR;
1332
1333                         hdr = ath10k_htt_rx_skb_get_hdr(msdu_head);
1334
1335                         if (ath10k_htt_rx_hdr_is_amsdu(hdr))
1336                                 ath10k_htt_rx_amsdu(htt, rx_status, msdu_head);
1337                         else
1338                                 ath10k_htt_rx_msdu(htt, rx_status, msdu_head);
1339                 }
1340         }
1341
1342         tasklet_schedule(&htt->rx_replenish_task);
1343 }
1344
1345 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1346                                        struct htt_rx_fragment_indication *frag)
1347 {
1348         struct ath10k *ar = htt->ar;
1349         struct sk_buff *msdu_head, *msdu_tail;
1350         enum htt_rx_mpdu_encrypt_type enctype;
1351         struct htt_rx_desc *rxd;
1352         enum rx_msdu_decap_format fmt;
1353         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1354         struct ieee80211_hdr *hdr;
1355         int ret;
1356         bool tkip_mic_err;
1357         bool decrypt_err;
1358         u8 *fw_desc;
1359         int fw_desc_len, hdrlen, paramlen;
1360         int trim;
1361         u32 attention = 0;
1362
1363         fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
1364         fw_desc = (u8 *)frag->fw_msdu_rx_desc;
1365
1366         msdu_head = NULL;
1367         msdu_tail = NULL;
1368
1369         spin_lock_bh(&htt->rx_ring.lock);
1370         ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1371                                       &msdu_head, &msdu_tail,
1372                                       &attention);
1373         spin_unlock_bh(&htt->rx_ring.lock);
1374
1375         ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1376
1377         if (ret) {
1378                 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1379                             ret);
1380                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1381                 return;
1382         }
1383
1384         /* FIXME: implement signal strength */
1385         rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1386
1387         hdr = (struct ieee80211_hdr *)msdu_head->data;
1388         rxd = (void *)msdu_head->data - sizeof(*rxd);
1389         tkip_mic_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1390         decrypt_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1391         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1392                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1393
1394         if (fmt != RX_MSDU_DECAP_RAW) {
1395                 ath10k_warn(ar, "we dont support non-raw fragmented rx yet\n");
1396                 dev_kfree_skb_any(msdu_head);
1397                 goto end;
1398         }
1399
1400         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1401                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1402         ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype, fmt,
1403                                   true);
1404         msdu_head->ip_summed = ath10k_htt_rx_get_csum_state(msdu_head);
1405
1406         if (tkip_mic_err)
1407                 ath10k_warn(ar, "tkip mic error\n");
1408
1409         if (decrypt_err) {
1410                 ath10k_warn(ar, "decryption err in fragmented rx\n");
1411                 dev_kfree_skb_any(msdu_head);
1412                 goto end;
1413         }
1414
1415         if (enctype != HTT_RX_MPDU_ENCRYPT_NONE) {
1416                 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1417                 paramlen = ath10k_htt_rx_crypto_param_len(ar, enctype);
1418
1419                 /* It is more efficient to move the header than the payload */
1420                 memmove((void *)msdu_head->data + paramlen,
1421                         (void *)msdu_head->data,
1422                         hdrlen);
1423                 skb_pull(msdu_head, paramlen);
1424                 hdr = (struct ieee80211_hdr *)msdu_head->data;
1425         }
1426
1427         /* remove trailing FCS */
1428         trim  = 4;
1429
1430         /* remove crypto trailer */
1431         trim += ath10k_htt_rx_crypto_tail_len(ar, enctype);
1432
1433         /* last fragment of TKIP frags has MIC */
1434         if (!ieee80211_has_morefrags(hdr->frame_control) &&
1435             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1436                 trim += MICHAEL_MIC_LEN;
1437
1438         if (trim > msdu_head->len) {
1439                 ath10k_warn(ar, "htt rx fragment: trailer longer than the frame itself? drop\n");
1440                 dev_kfree_skb_any(msdu_head);
1441                 goto end;
1442         }
1443
1444         skb_trim(msdu_head, msdu_head->len - trim);
1445
1446         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx frag mpdu: ",
1447                         msdu_head->data, msdu_head->len);
1448         ath10k_process_rx(htt->ar, rx_status, msdu_head);
1449
1450 end:
1451         if (fw_desc_len > 0) {
1452                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1453                            "expecting more fragmented rx in one indication %d\n",
1454                            fw_desc_len);
1455         }
1456 }
1457
1458 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
1459                                        struct sk_buff *skb)
1460 {
1461         struct ath10k_htt *htt = &ar->htt;
1462         struct htt_resp *resp = (struct htt_resp *)skb->data;
1463         struct htt_tx_done tx_done = {};
1464         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1465         __le16 msdu_id;
1466         int i;
1467
1468         lockdep_assert_held(&htt->tx_lock);
1469
1470         switch (status) {
1471         case HTT_DATA_TX_STATUS_NO_ACK:
1472                 tx_done.no_ack = true;
1473                 break;
1474         case HTT_DATA_TX_STATUS_OK:
1475                 break;
1476         case HTT_DATA_TX_STATUS_DISCARD:
1477         case HTT_DATA_TX_STATUS_POSTPONE:
1478         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1479                 tx_done.discard = true;
1480                 break;
1481         default:
1482                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1483                 tx_done.discard = true;
1484                 break;
1485         }
1486
1487         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1488                    resp->data_tx_completion.num_msdus);
1489
1490         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1491                 msdu_id = resp->data_tx_completion.msdus[i];
1492                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1493                 ath10k_txrx_tx_unref(htt, &tx_done);
1494         }
1495 }
1496
1497 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1498 {
1499         struct htt_rx_addba *ev = &resp->rx_addba;
1500         struct ath10k_peer *peer;
1501         struct ath10k_vif *arvif;
1502         u16 info0, tid, peer_id;
1503
1504         info0 = __le16_to_cpu(ev->info0);
1505         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1506         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1507
1508         ath10k_dbg(ar, ATH10K_DBG_HTT,
1509                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1510                    tid, peer_id, ev->window_size);
1511
1512         spin_lock_bh(&ar->data_lock);
1513         peer = ath10k_peer_find_by_id(ar, peer_id);
1514         if (!peer) {
1515                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1516                             peer_id);
1517                 spin_unlock_bh(&ar->data_lock);
1518                 return;
1519         }
1520
1521         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1522         if (!arvif) {
1523                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1524                             peer->vdev_id);
1525                 spin_unlock_bh(&ar->data_lock);
1526                 return;
1527         }
1528
1529         ath10k_dbg(ar, ATH10K_DBG_HTT,
1530                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1531                    peer->addr, tid, ev->window_size);
1532
1533         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1534         spin_unlock_bh(&ar->data_lock);
1535 }
1536
1537 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1538 {
1539         struct htt_rx_delba *ev = &resp->rx_delba;
1540         struct ath10k_peer *peer;
1541         struct ath10k_vif *arvif;
1542         u16 info0, tid, peer_id;
1543
1544         info0 = __le16_to_cpu(ev->info0);
1545         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1546         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1547
1548         ath10k_dbg(ar, ATH10K_DBG_HTT,
1549                    "htt rx delba tid %hu peer_id %hu\n",
1550                    tid, peer_id);
1551
1552         spin_lock_bh(&ar->data_lock);
1553         peer = ath10k_peer_find_by_id(ar, peer_id);
1554         if (!peer) {
1555                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1556                             peer_id);
1557                 spin_unlock_bh(&ar->data_lock);
1558                 return;
1559         }
1560
1561         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1562         if (!arvif) {
1563                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1564                             peer->vdev_id);
1565                 spin_unlock_bh(&ar->data_lock);
1566                 return;
1567         }
1568
1569         ath10k_dbg(ar, ATH10K_DBG_HTT,
1570                    "htt rx stop rx ba session sta %pM tid %hu\n",
1571                    peer->addr, tid);
1572
1573         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1574         spin_unlock_bh(&ar->data_lock);
1575 }
1576
1577 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
1578 {
1579         struct ath10k_htt *htt = &ar->htt;
1580         struct htt_resp *resp = (struct htt_resp *)skb->data;
1581
1582         /* confirm alignment */
1583         if (!IS_ALIGNED((unsigned long)skb->data, 4))
1584                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
1585
1586         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
1587                    resp->hdr.msg_type);
1588         switch (resp->hdr.msg_type) {
1589         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
1590                 htt->target_version_major = resp->ver_resp.major;
1591                 htt->target_version_minor = resp->ver_resp.minor;
1592                 complete(&htt->target_version_received);
1593                 break;
1594         }
1595         case HTT_T2H_MSG_TYPE_RX_IND:
1596                 spin_lock_bh(&htt->rx_ring.lock);
1597                 __skb_queue_tail(&htt->rx_compl_q, skb);
1598                 spin_unlock_bh(&htt->rx_ring.lock);
1599                 tasklet_schedule(&htt->txrx_compl_task);
1600                 return;
1601         case HTT_T2H_MSG_TYPE_PEER_MAP: {
1602                 struct htt_peer_map_event ev = {
1603                         .vdev_id = resp->peer_map.vdev_id,
1604                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
1605                 };
1606                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
1607                 ath10k_peer_map_event(htt, &ev);
1608                 break;
1609         }
1610         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
1611                 struct htt_peer_unmap_event ev = {
1612                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
1613                 };
1614                 ath10k_peer_unmap_event(htt, &ev);
1615                 break;
1616         }
1617         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
1618                 struct htt_tx_done tx_done = {};
1619                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
1620
1621                 tx_done.msdu_id =
1622                         __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
1623
1624                 switch (status) {
1625                 case HTT_MGMT_TX_STATUS_OK:
1626                         break;
1627                 case HTT_MGMT_TX_STATUS_RETRY:
1628                         tx_done.no_ack = true;
1629                         break;
1630                 case HTT_MGMT_TX_STATUS_DROP:
1631                         tx_done.discard = true;
1632                         break;
1633                 }
1634
1635                 spin_lock_bh(&htt->tx_lock);
1636                 ath10k_txrx_tx_unref(htt, &tx_done);
1637                 spin_unlock_bh(&htt->tx_lock);
1638                 break;
1639         }
1640         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
1641                 spin_lock_bh(&htt->tx_lock);
1642                 __skb_queue_tail(&htt->tx_compl_q, skb);
1643                 spin_unlock_bh(&htt->tx_lock);
1644                 tasklet_schedule(&htt->txrx_compl_task);
1645                 return;
1646         case HTT_T2H_MSG_TYPE_SEC_IND: {
1647                 struct ath10k *ar = htt->ar;
1648                 struct htt_security_indication *ev = &resp->security_indication;
1649
1650                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1651                            "sec ind peer_id %d unicast %d type %d\n",
1652                           __le16_to_cpu(ev->peer_id),
1653                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
1654                           MS(ev->flags, HTT_SECURITY_TYPE));
1655                 complete(&ar->install_key_done);
1656                 break;
1657         }
1658         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
1659                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1660                                 skb->data, skb->len);
1661                 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
1662                 break;
1663         }
1664         case HTT_T2H_MSG_TYPE_TEST:
1665                 /* FIX THIS */
1666                 break;
1667         case HTT_T2H_MSG_TYPE_STATS_CONF:
1668                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
1669                 break;
1670         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
1671                 /* Firmware can return tx frames if it's unable to fully
1672                  * process them and suspects host may be able to fix it. ath10k
1673                  * sends all tx frames as already inspected so this shouldn't
1674                  * happen unless fw has a bug.
1675                  */
1676                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
1677                 break;
1678         case HTT_T2H_MSG_TYPE_RX_ADDBA:
1679                 ath10k_htt_rx_addba(ar, resp);
1680                 break;
1681         case HTT_T2H_MSG_TYPE_RX_DELBA:
1682                 ath10k_htt_rx_delba(ar, resp);
1683                 break;
1684         case HTT_T2H_MSG_TYPE_PKTLOG: {
1685                 struct ath10k_pktlog_hdr *hdr =
1686                         (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;
1687
1688                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
1689                                         sizeof(*hdr) +
1690                                         __le16_to_cpu(hdr->size));
1691                 break;
1692         }
1693         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
1694                 /* Ignore this event because mac80211 takes care of Rx
1695                  * aggregation reordering.
1696                  */
1697                 break;
1698         }
1699         default:
1700                 ath10k_warn(ar, "htt event (%d) not handled\n",
1701                             resp->hdr.msg_type);
1702                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1703                                 skb->data, skb->len);
1704                 break;
1705         };
1706
1707         /* Free the indication buffer */
1708         dev_kfree_skb_any(skb);
1709 }
1710
1711 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
1712 {
1713         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
1714         struct htt_resp *resp;
1715         struct sk_buff *skb;
1716
1717         spin_lock_bh(&htt->tx_lock);
1718         while ((skb = __skb_dequeue(&htt->tx_compl_q))) {
1719                 ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
1720                 dev_kfree_skb_any(skb);
1721         }
1722         spin_unlock_bh(&htt->tx_lock);
1723
1724         spin_lock_bh(&htt->rx_ring.lock);
1725         while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
1726                 resp = (struct htt_resp *)skb->data;
1727                 ath10k_htt_rx_handler(htt, &resp->rx_ind);
1728                 dev_kfree_skb_any(skb);
1729         }
1730         spin_unlock_bh(&htt->rx_ring.lock);
1731 }