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         dma_unmap_single(htt->ar->dev,
 295                          ATH10K_SKB_CB(msdu)->paddr,
 296                          msdu->len + skb_tailroom(msdu),
 297                          DMA_FROM_DEVICE);
 298         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 299                         msdu->data, msdu->len + skb_tailroom(msdu));
 300
 301         return msdu;
 302 }
 303
 304 static void ath10k_htt_rx_free_msdu_chain(struct sk_buff *skb)
 305 {
 306         struct sk_buff *next;
 307
 308         while (skb) {
 309                 next = skb->next;
 310                 dev_kfree_skb_any(skb);
 311                 skb = next;
 312         }
 313 }
 314
 315 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 316 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 317                                    u8 **fw_desc, int *fw_desc_len,
 318                                    struct sk_buff **head_msdu,
 319                                    struct sk_buff **tail_msdu,
 320                                    u32 *attention)
 321 {
 322         struct ath10k *ar = htt->ar;
 323         int msdu_len, msdu_chaining = 0;
 324         struct sk_buff *msdu, *next;
 325         struct htt_rx_desc *rx_desc;
 326
 327         lockdep_assert_held(&htt->rx_ring.lock);
 328
 329         if (htt->rx_confused) {
 330                 ath10k_warn(ar, "htt is confused. refusing rx\n");
 331                 return -1;
 332         }
 333
 334         msdu = *head_msdu = ath10k_htt_rx_netbuf_pop(htt);
 335         while (msdu) {
 336                 int last_msdu, msdu_len_invalid, msdu_chained;
 337
 338                 rx_desc = (struct htt_rx_desc *)msdu->data;
 339
 340                 /* FIXME: we must report msdu payload since this is what caller
 341                  *        expects now */
 342                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 343                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 344
 345                 /*
 346                  * Sanity check - confirm the HW is finished filling in the
 347                  * rx data.
 348                  * If the HW and SW are working correctly, then it's guaranteed
 349                  * that the HW's MAC DMA is done before this point in the SW.
 350                  * To prevent the case that we handle a stale Rx descriptor,
 351                  * just assert for now until we have a way to recover.
 352                  */
 353                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 354                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 355                         ath10k_htt_rx_free_msdu_chain(*head_msdu);
 356                         *head_msdu = NULL;
 357                         msdu = NULL;
 358                         ath10k_err(ar, "htt rx stopped. cannot recover\n");
 359                         htt->rx_confused = true;
 360                         break;
 361                 }
 362
 363                 *attention |= __le32_to_cpu(rx_desc->attention.flags) &
 364                                             (RX_ATTENTION_FLAGS_TKIP_MIC_ERR |
 365                                              RX_ATTENTION_FLAGS_DECRYPT_ERR |
 366                                              RX_ATTENTION_FLAGS_FCS_ERR |
 367                                              RX_ATTENTION_FLAGS_MGMT_TYPE);
 368                 /*
 369                  * Copy the FW rx descriptor for this MSDU from the rx
 370                  * indication message into the MSDU's netbuf. HL uses the
 371                  * same rx indication message definition as LL, and simply
 372                  * appends new info (fields from the HW rx desc, and the
 373                  * MSDU payload itself). So, the offset into the rx
 374                  * indication message only has to account for the standard
 375                  * offset of the per-MSDU FW rx desc info within the
 376                  * message, and how many bytes of the per-MSDU FW rx desc
 377                  * info have already been consumed. (And the endianness of
 378                  * the host, since for a big-endian host, the rx ind
 379                  * message contents, including the per-MSDU rx desc bytes,
 380                  * were byteswapped during upload.)
 381                  */
 382                 if (*fw_desc_len > 0) {
 383                         rx_desc->fw_desc.info0 = **fw_desc;
 384                         /*
 385                          * The target is expected to only provide the basic
 386                          * per-MSDU rx descriptors. Just to be sure, verify
 387                          * that the target has not attached extension data
 388                          * (e.g. LRO flow ID).
 389                          */
 390
 391                         /* or more, if there's extension data */
 392                         (*fw_desc)++;
 393                         (*fw_desc_len)--;
 394                 } else {
 395                         /*
 396                          * When an oversized AMSDU happened, FW will lost
 397                          * some of MSDU status - in this case, the FW
 398                          * descriptors provided will be less than the
 399                          * actual MSDUs inside this MPDU. Mark the FW
 400                          * descriptors so that it will still deliver to
 401                          * upper stack, if no CRC error for this MPDU.
 402                          *
 403                          * FIX THIS - the FW descriptors are actually for
 404                          * MSDUs in the end of this A-MSDU instead of the
 405                          * beginning.
 406                          */
 407                         rx_desc->fw_desc.info0 = 0;
 408                 }
 409
 410                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 411                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 412                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 413                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0),
 414                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 415                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 416
 417                 if (msdu_len_invalid)
 418                         msdu_len = 0;
 419
 420                 skb_trim(msdu, 0);
 421                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 422                 msdu_len -= msdu->len;
 423
 424                 /* FIXME: Do chained buffers include htt_rx_desc or not? */
 425                 while (msdu_chained--) {
 426                         struct sk_buff *next = ath10k_htt_rx_netbuf_pop(htt);
 427
 428                         if (!next) {
 429                                 ath10k_warn(ar, "failed to pop chained msdu\n");
 430                                 ath10k_htt_rx_free_msdu_chain(*head_msdu);
 431                                 *head_msdu = NULL;
 432                                 msdu = NULL;
 433                                 htt->rx_confused = true;
 434                                 break;
 435                         }
 436
 437                         skb_trim(next, 0);
 438                         skb_put(next, min(msdu_len, HTT_RX_BUF_SIZE));
 439                         msdu_len -= next->len;
 440
 441                         msdu->next = next;
 442                         msdu = next;
 443                         msdu_chaining = 1;
 444                 }
 445
 446                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) &
 447                                 RX_MSDU_END_INFO0_LAST_MSDU;
 448
 449                 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
 450                                          sizeof(*rx_desc) - sizeof(u32));
 451                 if (last_msdu) {
 452                         msdu->next = NULL;
 453                         break;
 454                 }
 455
 456                 next = ath10k_htt_rx_netbuf_pop(htt);
 457                 msdu->next = next;
 458                 msdu = next;
 459         }
 460         *tail_msdu = msdu;
 461
 462         if (*head_msdu == NULL)
 463                 msdu_chaining = -1;
 464
 465         /*
 466          * Don't refill the ring yet.
 467          *
 468          * First, the elements popped here are still in use - it is not
 469          * safe to overwrite them until the matching call to
 470          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 471          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 472          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 473          * (something like 3 buffers). Consequently, we'll rely on the txrx
 474          * SW to tell us when it is done pulling all the PPDU's rx buffers
 475          * out of the rx ring, and then refill it just once.
 476          */
 477
 478         return msdu_chaining;
 479 }
 480
 481 static void ath10k_htt_rx_replenish_task(unsigned long ptr)
 482 {
 483         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
 484
 485         ath10k_htt_rx_msdu_buff_replenish(htt);
 486 }
 487
 488 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 489 {
 490         struct ath10k *ar = htt->ar;
 491         dma_addr_t paddr;
 492         void *vaddr;
 493         size_t size;
 494         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 495
 496         htt->rx_confused = false;
 497
 498         htt->rx_ring.size = ath10k_htt_rx_ring_size(htt);
 499         if (!is_power_of_2(htt->rx_ring.size)) {
 500                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 501                 return -EINVAL;
 502         }
 503
 504         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 505
 506         /*
 507          * Set the initial value for the level to which the rx ring
 508          * should be filled, based on the max throughput and the
 509          * worst likely latency for the host to fill the rx ring
 510          * with new buffers. In theory, this fill level can be
 511          * dynamically adjusted from the initial value set here, to
 512          * reflect the actual host latency rather than a
 513          * conservative assumption about the host latency.
 514          */
 515         htt->rx_ring.fill_level = ath10k_htt_rx_ring_fill_level(htt);
 516
 517         htt->rx_ring.netbufs_ring =
 518                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 519                         GFP_KERNEL);
 520         if (!htt->rx_ring.netbufs_ring)
 521                 goto err_netbuf;
 522
 523         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 524
 525         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
 526         if (!vaddr)
 527                 goto err_dma_ring;
 528
 529         htt->rx_ring.paddrs_ring = vaddr;
 530         htt->rx_ring.base_paddr = paddr;
 531
 532         vaddr = dma_alloc_coherent(htt->ar->dev,
 533                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 534                                    &paddr, GFP_DMA);
 535         if (!vaddr)
 536                 goto err_dma_idx;
 537
 538         htt->rx_ring.alloc_idx.vaddr = vaddr;
 539         htt->rx_ring.alloc_idx.paddr = paddr;
 540         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 541         *htt->rx_ring.alloc_idx.vaddr = 0;
 542
 543         /* Initialize the Rx refill retry timer */
 544         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 545
 546         spin_lock_init(&htt->rx_ring.lock);
 547
 548         htt->rx_ring.fill_cnt = 0;
 549         if (__ath10k_htt_rx_ring_fill_n(htt, htt->rx_ring.fill_level))
 550                 goto err_fill_ring;
 551
 552         tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
 553                      (unsigned long)htt);
 554
 555         skb_queue_head_init(&htt->tx_compl_q);
 556         skb_queue_head_init(&htt->rx_compl_q);
 557
 558         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 559                      (unsigned long)htt);
 560
 561         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 562                    htt->rx_ring.size, htt->rx_ring.fill_level);
 563         return 0;
 564
 565 err_fill_ring:
 566         ath10k_htt_rx_ring_free(htt);
 567         dma_free_coherent(htt->ar->dev,
 568                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 569                           htt->rx_ring.alloc_idx.vaddr,
 570                           htt->rx_ring.alloc_idx.paddr);
 571 err_dma_idx:
 572         dma_free_coherent(htt->ar->dev,
 573                           (htt->rx_ring.size *
 574                            sizeof(htt->rx_ring.paddrs_ring)),
 575                           htt->rx_ring.paddrs_ring,
 576                           htt->rx_ring.base_paddr);
 577 err_dma_ring:
 578         kfree(htt->rx_ring.netbufs_ring);
 579 err_netbuf:
 580         return -ENOMEM;
 581 }
 582
 583 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 584                                           enum htt_rx_mpdu_encrypt_type type)
 585 {
 586         switch (type) {
 587         case HTT_RX_MPDU_ENCRYPT_NONE:
 588                 return 0;
 589         case HTT_RX_MPDU_ENCRYPT_WEP40:
 590         case HTT_RX_MPDU_ENCRYPT_WEP104:
 591                 return IEEE80211_WEP_IV_LEN;
 592         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 593         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 594                 return IEEE80211_TKIP_IV_LEN;
 595         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 596                 return IEEE80211_CCMP_HDR_LEN;
 597         case HTT_RX_MPDU_ENCRYPT_WEP128:
 598         case HTT_RX_MPDU_ENCRYPT_WAPI:
 599                 break;
 600         }
 601
 602         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 603         return 0;
 604 }
 605
 606 #define MICHAEL_MIC_LEN 8
 607
 608 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 609                                          enum htt_rx_mpdu_encrypt_type type)
 610 {
 611         switch (type) {
 612         case HTT_RX_MPDU_ENCRYPT_NONE:
 613                 return 0;
 614         case HTT_RX_MPDU_ENCRYPT_WEP40:
 615         case HTT_RX_MPDU_ENCRYPT_WEP104:
 616                 return IEEE80211_WEP_ICV_LEN;
 617         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 618         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 619                 return IEEE80211_TKIP_ICV_LEN;
 620         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 621                 return IEEE80211_CCMP_MIC_LEN;
 622         case HTT_RX_MPDU_ENCRYPT_WEP128:
 623         case HTT_RX_MPDU_ENCRYPT_WAPI:
 624                 break;
 625         }
 626
 627         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 628         return 0;
 629 }
 630
 631 /* Applies for first msdu in chain, before altering it. */
 632 static struct ieee80211_hdr *ath10k_htt_rx_skb_get_hdr(struct sk_buff *skb)
 633 {
 634         struct htt_rx_desc *rxd;
 635         enum rx_msdu_decap_format fmt;
 636
 637         rxd = (void *)skb->data - sizeof(*rxd);
 638         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 639                  RX_MSDU_START_INFO1_DECAP_FORMAT);
 640
 641         if (fmt == RX_MSDU_DECAP_RAW)
 642                 return (void *)skb->data;
 643
 644         return (void *)skb->data - RX_HTT_HDR_STATUS_LEN;
 645 }
 646
 647 /* This function only applies for first msdu in an msdu chain */
 648 static bool ath10k_htt_rx_hdr_is_amsdu(struct ieee80211_hdr *hdr)
 649 {
 650         u8 *qc;
 651
 652         if (ieee80211_is_data_qos(hdr->frame_control)) {
 653                 qc = ieee80211_get_qos_ctl(hdr);
 654                 if (qc[0] & 0x80)
 655                         return true;
 656         }
 657         return false;
 658 }
 659
 660 struct rfc1042_hdr {
 661         u8 llc_dsap;
 662         u8 llc_ssap;
 663         u8 llc_ctrl;
 664         u8 snap_oui[3];
 665         __be16 snap_type;
 666 } __packed;
 667
 668 struct amsdu_subframe_hdr {
 669         u8 dst[ETH_ALEN];
 670         u8 src[ETH_ALEN];
 671         __be16 len;
 672 } __packed;
 673
 674 static const u8 rx_legacy_rate_idx[] = {
 675         3,      /* 0x00  - 11Mbps  */
 676         2,      /* 0x01  - 5.5Mbps */
 677         1,      /* 0x02  - 2Mbps   */
 678         0,      /* 0x03  - 1Mbps   */
 679         3,      /* 0x04  - 11Mbps  */
 680         2,      /* 0x05  - 5.5Mbps */
 681         1,      /* 0x06  - 2Mbps   */
 682         0,      /* 0x07  - 1Mbps   */
 683         10,     /* 0x08  - 48Mbps  */
 684         8,      /* 0x09  - 24Mbps  */
 685         6,      /* 0x0A  - 12Mbps  */
 686         4,      /* 0x0B  - 6Mbps   */
 687         11,     /* 0x0C  - 54Mbps  */
 688         9,      /* 0x0D  - 36Mbps  */
 689         7,      /* 0x0E  - 18Mbps  */
 690         5,      /* 0x0F  - 9Mbps   */
 691 };
 692
 693 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 694                                   enum ieee80211_band band,
 695                                   u8 info0, u32 info1, u32 info2,
 696                                   struct ieee80211_rx_status *status)
 697 {
 698         u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
 699         u8 preamble = 0;
 700
 701         /* Check if valid fields */
 702         if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
 703                 return;
 704
 705         preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
 706
 707         switch (preamble) {
 708         case HTT_RX_LEGACY:
 709                 cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
 710                 rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
 711                 rate_idx = 0;
 712
 713                 if (rate < 0x08 || rate > 0x0F)
 714                         break;
 715
 716                 switch (band) {
 717                 case IEEE80211_BAND_2GHZ:
 718                         if (cck)
 719                                 rate &= ~BIT(3);
 720                         rate_idx = rx_legacy_rate_idx[rate];
 721                         break;
 722                 case IEEE80211_BAND_5GHZ:
 723                         rate_idx = rx_legacy_rate_idx[rate];
 724                         /* We are using same rate table registering
 725                            HW - ath10k_rates[]. In case of 5GHz skip
 726                            CCK rates, so -4 here */
 727                         rate_idx -= 4;
 728                         break;
 729                 default:
 730                         break;
 731                 }
 732
 733                 status->rate_idx = rate_idx;
 734                 break;
 735         case HTT_RX_HT:
 736         case HTT_RX_HT_WITH_TXBF:
 737                 /* HT-SIG - Table 20-11 in info1 and info2 */
 738                 mcs = info1 & 0x1F;
 739                 nss = mcs >> 3;
 740                 bw = (info1 >> 7) & 1;
 741                 sgi = (info2 >> 7) & 1;
 742
 743                 status->rate_idx = mcs;
 744                 status->flag |= RX_FLAG_HT;
 745                 if (sgi)
 746                         status->flag |= RX_FLAG_SHORT_GI;
 747                 if (bw)
 748                         status->flag |= RX_FLAG_40MHZ;
 749                 break;
 750         case HTT_RX_VHT:
 751         case HTT_RX_VHT_WITH_TXBF:
 752                 /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
 753                    TODO check this */
 754                 mcs = (info2 >> 4) & 0x0F;
 755                 nss = ((info1 >> 10) & 0x07) + 1;
 756                 bw = info1 & 3;
 757                 sgi = info2 & 1;
 758
 759                 status->rate_idx = mcs;
 760                 status->vht_nss = nss;
 761
 762                 if (sgi)
 763                         status->flag |= RX_FLAG_SHORT_GI;
 764
 765                 switch (bw) {
 766                 /* 20MHZ */
 767                 case 0:
 768                         break;
 769                 /* 40MHZ */
 770                 case 1:
 771                         status->flag |= RX_FLAG_40MHZ;
 772                         break;
 773                 /* 80MHZ */
 774                 case 2:
 775                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 776                 }
 777
 778                 status->flag |= RX_FLAG_VHT;
 779                 break;
 780         default:
 781                 break;
 782         }
 783 }
 784
 785 static void ath10k_htt_rx_h_protected(struct ath10k_htt *htt,
 786                                       struct ieee80211_rx_status *rx_status,
 787                                       struct sk_buff *skb,
 788                                       enum htt_rx_mpdu_encrypt_type enctype,
 789                                       enum rx_msdu_decap_format fmt,
 790                                       bool dot11frag)
 791 {
 792         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 793
 794         rx_status->flag &= ~(RX_FLAG_DECRYPTED |
 795                              RX_FLAG_IV_STRIPPED |
 796                              RX_FLAG_MMIC_STRIPPED);
 797
 798         if (enctype == HTT_RX_MPDU_ENCRYPT_NONE)
 799                 return;
 800
 801         /*
 802          * There's no explicit rx descriptor flag to indicate whether a given
 803          * frame has been decrypted or not. We're forced to use the decap
 804          * format as an implicit indication. However fragmentation rx is always
 805          * raw and it probably never reports undecrypted raws.
 806          *
 807          * This makes sure sniffed frames are reported as-is without stripping
 808          * the protected flag.
 809          */
 810         if (fmt == RX_MSDU_DECAP_RAW && !dot11frag)
 811                 return;
 812
 813         rx_status->flag |= RX_FLAG_DECRYPTED |
 814                            RX_FLAG_IV_STRIPPED |
 815                            RX_FLAG_MMIC_STRIPPED;
 816         hdr->frame_control = __cpu_to_le16(__le16_to_cpu(hdr->frame_control) &
 817                                            ~IEEE80211_FCTL_PROTECTED);
 818 }
 819
 820 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 821                                     struct ieee80211_rx_status *status)
 822 {
 823         struct ieee80211_channel *ch;
 824
 825         spin_lock_bh(&ar->data_lock);
 826         ch = ar->scan_channel;
 827         if (!ch)
 828                 ch = ar->rx_channel;
 829         spin_unlock_bh(&ar->data_lock);
 830
 831         if (!ch)
 832                 return false;
 833
 834         status->band = ch->band;
 835         status->freq = ch->center_freq;
 836
 837         return true;
 838 }
 839
 840 static const char * const tid_to_ac[] = {
 841         "BE",
 842         "BK",
 843         "BK",
 844         "BE",
 845         "VI",
 846         "VI",
 847         "VO",
 848         "VO",
 849 };
 850
 851 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 852 {
 853         u8 *qc;
 854         int tid;
 855
 856         if (!ieee80211_is_data_qos(hdr->frame_control))
 857                 return "";
 858
 859         qc = ieee80211_get_qos_ctl(hdr);
 860         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 861         if (tid < 8)
 862                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 863         else
 864                 snprintf(out, size, "tid %d", tid);
 865
 866         return out;
 867 }
 868
 869 static void ath10k_process_rx(struct ath10k *ar,
 870                               struct ieee80211_rx_status *rx_status,
 871                               struct sk_buff *skb)
 872 {
 873         struct ieee80211_rx_status *status;
 874         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 875         char tid[32];
 876
 877         status = IEEE80211_SKB_RXCB(skb);
 878         *status = *rx_status;
 879
 880         ath10k_dbg(ar, ATH10K_DBG_DATA,
 881                    "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",
 882                    skb,
 883                    skb->len,
 884                    ieee80211_get_SA(hdr),
 885                    ath10k_get_tid(hdr, tid, sizeof(tid)),
 886                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
 887                                                         "mcast" : "ucast",
 888                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
 889                    status->flag == 0 ? "legacy" : "",
 890                    status->flag & RX_FLAG_HT ? "ht" : "",
 891                    status->flag & RX_FLAG_VHT ? "vht" : "",
 892                    status->flag & RX_FLAG_40MHZ ? "40" : "",
 893                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
 894                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
 895                    status->rate_idx,
 896                    status->vht_nss,
 897                    status->freq,
 898                    status->band, status->flag,
 899                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
 900                    !!(status->flag & RX_FLAG_MMIC_ERROR),
 901                    !!(status->flag & RX_FLAG_AMSDU_MORE));
 902         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
 903                         skb->data, skb->len);
 904         trace_ath10k_rx_hdr(ar, skb->data, skb->len);
 905         trace_ath10k_rx_payload(ar, skb->data, skb->len);
 906
 907         ieee80211_rx(ar->hw, skb);
 908 }
 909
 910 static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr)
 911 {
 912         /* nwifi header is padded to 4 bytes. this fixes 4addr rx */
 913         return round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 914 }
 915
 916 static void ath10k_htt_rx_amsdu(struct ath10k_htt *htt,
 917                                 struct ieee80211_rx_status *rx_status,
 918                                 struct sk_buff *skb_in)
 919 {
 920         struct ath10k *ar = htt->ar;
 921         struct htt_rx_desc *rxd;
 922         struct sk_buff *skb = skb_in;
 923         struct sk_buff *first;
 924         enum rx_msdu_decap_format fmt;
 925         enum htt_rx_mpdu_encrypt_type enctype;
 926         struct ieee80211_hdr *hdr;
 927         u8 hdr_buf[64], da[ETH_ALEN], sa[ETH_ALEN], *qos;
 928         unsigned int hdr_len;
 929
 930         rxd = (void *)skb->data - sizeof(*rxd);
 931         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 932                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
 933
 934         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
 935         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 936         memcpy(hdr_buf, hdr, hdr_len);
 937         hdr = (struct ieee80211_hdr *)hdr_buf;
 938
 939         first = skb;
 940         while (skb) {
 941                 void *decap_hdr;
 942                 int len;
 943
 944                 rxd = (void *)skb->data - sizeof(*rxd);
 945                 fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
 946                          RX_MSDU_START_INFO1_DECAP_FORMAT);
 947                 decap_hdr = (void *)rxd->rx_hdr_status;
 948
 949                 skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
 950
 951                 /* First frame in an A-MSDU chain has more decapped data. */
 952                 if (skb == first) {
 953                         len = round_up(ieee80211_hdrlen(hdr->frame_control), 4);
 954                         len += round_up(ath10k_htt_rx_crypto_param_len(ar,
 955                                                 enctype), 4);
 956                         decap_hdr += len;
 957                 }
 958
 959                 switch (fmt) {
 960                 case RX_MSDU_DECAP_RAW:
 961                         /* remove trailing FCS */
 962                         skb_trim(skb, skb->len - FCS_LEN);
 963                         break;
 964                 case RX_MSDU_DECAP_NATIVE_WIFI:
 965                         /* pull decapped header and copy SA & DA */
 966                         hdr = (struct ieee80211_hdr *)skb->data;
 967                         hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
 968                         ether_addr_copy(da, ieee80211_get_DA(hdr));
 969                         ether_addr_copy(sa, ieee80211_get_SA(hdr));
 970                         skb_pull(skb, hdr_len);
 971
 972                         /* push original 802.11 header */
 973                         hdr = (struct ieee80211_hdr *)hdr_buf;
 974                         hdr_len = ieee80211_hdrlen(hdr->frame_control);
 975                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
 976
 977                         /* original A-MSDU header has the bit set but we're
 978                          * not including A-MSDU subframe header */
 979                         hdr = (struct ieee80211_hdr *)skb->data;
 980                         qos = ieee80211_get_qos_ctl(hdr);
 981                         qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 982
 983                         /* original 802.11 header has a different DA and in
 984                          * case of 4addr it may also have different SA
 985                          */
 986                         ether_addr_copy(ieee80211_get_DA(hdr), da);
 987                         ether_addr_copy(ieee80211_get_SA(hdr), sa);
 988                         break;
 989                 case RX_MSDU_DECAP_ETHERNET2_DIX:
 990                         /* strip ethernet header and insert decapped 802.11
 991                          * header, amsdu subframe header and rfc1042 header */
 992
 993                         len = 0;
 994                         len += sizeof(struct rfc1042_hdr);
 995                         len += sizeof(struct amsdu_subframe_hdr);
 996
 997                         skb_pull(skb, sizeof(struct ethhdr));
 998                         memcpy(skb_push(skb, len), decap_hdr, len);
 999                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1000                         break;
1001                 case RX_MSDU_DECAP_8023_SNAP_LLC:
1002                         /* insert decapped 802.11 header making a singly
1003                          * A-MSDU */
1004                         memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1005                         break;
1006                 }
1007
1008                 skb_in = skb;
1009                 ath10k_htt_rx_h_protected(htt, rx_status, skb_in, enctype, fmt,
1010                                           false);
1011                 skb = skb->next;
1012                 skb_in->next = NULL;
1013
1014                 if (skb)
1015                         rx_status->flag |= RX_FLAG_AMSDU_MORE;
1016                 else
1017                         rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
1018
1019                 ath10k_process_rx(htt->ar, rx_status, skb_in);
1020         }
1021
1022         /* FIXME: It might be nice to re-assemble the A-MSDU when there's a
1023          * monitor interface active for sniffing purposes. */
1024 }
1025
1026 static void ath10k_htt_rx_msdu(struct ath10k_htt *htt,
1027                                struct ieee80211_rx_status *rx_status,
1028                                struct sk_buff *skb)
1029 {
1030         struct ath10k *ar = htt->ar;
1031         struct htt_rx_desc *rxd;
1032         struct ieee80211_hdr *hdr;
1033         enum rx_msdu_decap_format fmt;
1034         enum htt_rx_mpdu_encrypt_type enctype;
1035         int hdr_len;
1036         void *rfc1042;
1037
1038         /* This shouldn't happen. If it does than it may be a FW bug. */
1039         if (skb->next) {
1040                 ath10k_warn(ar, "htt rx received chained non A-MSDU frame\n");
1041                 ath10k_htt_rx_free_msdu_chain(skb->next);
1042                 skb->next = NULL;
1043         }
1044
1045         rxd = (void *)skb->data - sizeof(*rxd);
1046         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1047                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1048         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1049                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1050         hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1051         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1052
1053         skb->ip_summed = ath10k_htt_rx_get_csum_state(skb);
1054
1055         switch (fmt) {
1056         case RX_MSDU_DECAP_RAW:
1057                 /* remove trailing FCS */
1058                 skb_trim(skb, skb->len - FCS_LEN);
1059                 break;
1060         case RX_MSDU_DECAP_NATIVE_WIFI:
1061                 /* Pull decapped header */
1062                 hdr = (struct ieee80211_hdr *)skb->data;
1063                 hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
1064                 skb_pull(skb, hdr_len);
1065
1066                 /* Push original header */
1067                 hdr = (struct ieee80211_hdr *)rxd->rx_hdr_status;
1068                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1069                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1070                 break;
1071         case RX_MSDU_DECAP_ETHERNET2_DIX:
1072                 /* strip ethernet header and insert decapped 802.11 header and
1073                  * rfc1042 header */
1074
1075                 rfc1042 = hdr;
1076                 rfc1042 += roundup(hdr_len, 4);
1077                 rfc1042 += roundup(ath10k_htt_rx_crypto_param_len(ar,
1078                                         enctype), 4);
1079
1080                 skb_pull(skb, sizeof(struct ethhdr));
1081                 memcpy(skb_push(skb, sizeof(struct rfc1042_hdr)),
1082                        rfc1042, sizeof(struct rfc1042_hdr));
1083                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1084                 break;
1085         case RX_MSDU_DECAP_8023_SNAP_LLC:
1086                 /* remove A-MSDU subframe header and insert
1087                  * decapped 802.11 header. rfc1042 header is already there */
1088
1089                 skb_pull(skb, sizeof(struct amsdu_subframe_hdr));
1090                 memcpy(skb_push(skb, hdr_len), hdr, hdr_len);
1091                 break;
1092         }
1093
1094         ath10k_htt_rx_h_protected(htt, rx_status, skb, enctype, fmt, false);
1095
1096         ath10k_process_rx(htt->ar, rx_status, skb);
1097 }
1098
1099 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1100 {
1101         struct htt_rx_desc *rxd;
1102         u32 flags, info;
1103         bool is_ip4, is_ip6;
1104         bool is_tcp, is_udp;
1105         bool ip_csum_ok, tcpudp_csum_ok;
1106
1107         rxd = (void *)skb->data - sizeof(*rxd);
1108         flags = __le32_to_cpu(rxd->attention.flags);
1109         info = __le32_to_cpu(rxd->msdu_start.info1);
1110
1111         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1112         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1113         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1114         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1115         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1116         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1117
1118         if (!is_ip4 && !is_ip6)
1119                 return CHECKSUM_NONE;
1120         if (!is_tcp && !is_udp)
1121                 return CHECKSUM_NONE;
1122         if (!ip_csum_ok)
1123                 return CHECKSUM_NONE;
1124         if (!tcpudp_csum_ok)
1125                 return CHECKSUM_NONE;
1126
1127         return CHECKSUM_UNNECESSARY;
1128 }
1129
1130 static int ath10k_unchain_msdu(struct sk_buff *msdu_head)
1131 {
1132         struct sk_buff *next = msdu_head->next;
1133         struct sk_buff *to_free = next;
1134         int space;
1135         int total_len = 0;
1136
1137         /* TODO:  Might could optimize this by using
1138          * skb_try_coalesce or similar method to
1139          * decrease copying, or maybe get mac80211 to
1140          * provide a way to just receive a list of
1141          * skb?
1142          */
1143
1144         msdu_head->next = NULL;
1145
1146         /* Allocate total length all at once. */
1147         while (next) {
1148                 total_len += next->len;
1149                 next = next->next;
1150         }
1151
1152         space = total_len - skb_tailroom(msdu_head);
1153         if ((space > 0) &&
1154             (pskb_expand_head(msdu_head, 0, space, GFP_ATOMIC) < 0)) {
1155                 /* TODO:  bump some rx-oom error stat */
1156                 /* put it back together so we can free the
1157                  * whole list at once.
1158                  */
1159                 msdu_head->next = to_free;
1160                 return -1;
1161         }
1162
1163         /* Walk list again, copying contents into
1164          * msdu_head
1165          */
1166         next = to_free;
1167         while (next) {
1168                 skb_copy_from_linear_data(next, skb_put(msdu_head, next->len),
1169                                           next->len);
1170                 next = next->next;
1171         }
1172
1173         /* If here, we have consolidated skb.  Free the
1174          * fragments and pass the main skb on up the
1175          * stack.
1176          */
1177         ath10k_htt_rx_free_msdu_chain(to_free);
1178         return 0;
1179 }
1180
1181 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k_htt *htt,
1182                                         struct sk_buff *head,
1183                                         bool channel_set,
1184                                         u32 attention)
1185 {
1186         struct ath10k *ar = htt->ar;
1187
1188         if (head->len == 0) {
1189                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1190                            "htt rx dropping due to zero-len\n");
1191                 return false;
1192         }
1193
1194         if (attention & RX_ATTENTION_FLAGS_DECRYPT_ERR) {
1195                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1196                            "htt rx dropping due to decrypt-err\n");
1197                 return false;
1198         }
1199
1200         if (!channel_set) {
1201                 ath10k_warn(ar, "no channel configured; ignoring frame!\n");
1202                 return false;
1203         }
1204
1205         /* Skip mgmt frames while we handle this in WMI */
1206         if (attention & RX_ATTENTION_FLAGS_MGMT_TYPE) {
1207                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1208                 return false;
1209         }
1210
1211         if (test_bit(ATH10K_CAC_RUNNING, &htt->ar->dev_flags)) {
1212                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1213                            "htt rx CAC running\n");
1214                 return false;
1215         }
1216
1217         return true;
1218 }
1219
1220 static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
1221                                   struct htt_rx_indication *rx)
1222 {
1223         struct ath10k *ar = htt->ar;
1224         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1225         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1226         struct ieee80211_hdr *hdr;
1227         int num_mpdu_ranges;
1228         u32 attention;
1229         int fw_desc_len;
1230         u8 *fw_desc;
1231         bool channel_set;
1232         int i, j;
1233         int ret;
1234
1235         lockdep_assert_held(&htt->rx_ring.lock);
1236
1237         fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
1238         fw_desc = (u8 *)&rx->fw_desc;
1239
1240         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1241                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1242         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1243
1244         /* Fill this once, while this is per-ppdu */
1245         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_START_VALID) {
1246                 memset(rx_status, 0, sizeof(*rx_status));
1247                 rx_status->signal  = ATH10K_DEFAULT_NOISE_FLOOR +
1248                                      rx->ppdu.combined_rssi;
1249         }
1250
1251         if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_END_VALID) {
1252                 /* TSF available only in 32-bit */
1253                 rx_status->mactime = __le32_to_cpu(rx->ppdu.tsf) & 0xffffffff;
1254                 rx_status->flag |= RX_FLAG_MACTIME_END;
1255         }
1256
1257         channel_set = ath10k_htt_rx_h_channel(htt->ar, rx_status);
1258
1259         if (channel_set) {
1260                 ath10k_htt_rx_h_rates(htt->ar, rx_status->band,
1261                                       rx->ppdu.info0,
1262                                       __le32_to_cpu(rx->ppdu.info1),
1263                                       __le32_to_cpu(rx->ppdu.info2),
1264                                       rx_status);
1265         }
1266
1267         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1268                         rx, sizeof(*rx) +
1269                         (sizeof(struct htt_rx_indication_mpdu_range) *
1270                                 num_mpdu_ranges));
1271
1272         for (i = 0; i < num_mpdu_ranges; i++) {
1273                 for (j = 0; j < mpdu_ranges[i].mpdu_count; j++) {
1274                         struct sk_buff *msdu_head, *msdu_tail;
1275
1276                         attention = 0;
1277                         msdu_head = NULL;
1278                         msdu_tail = NULL;
1279                         ret = ath10k_htt_rx_amsdu_pop(htt,
1280                                                       &fw_desc,
1281                                                       &fw_desc_len,
1282                                                       &msdu_head,
1283                                                       &msdu_tail,
1284                                                       &attention);
1285
1286                         if (ret < 0) {
1287                                 ath10k_warn(ar, "failed to pop amsdu from htt rx ring %d\n",
1288                                             ret);
1289                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1290                                 continue;
1291                         }
1292
1293                         if (!ath10k_htt_rx_amsdu_allowed(htt, msdu_head,
1294                                                          channel_set,
1295                                                          attention)) {
1296                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1297                                 continue;
1298                         }
1299
1300                         if (ret > 0 &&
1301                             ath10k_unchain_msdu(msdu_head) < 0) {
1302                                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1303                                 continue;
1304                         }
1305
1306                         if (attention & RX_ATTENTION_FLAGS_FCS_ERR)
1307                                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
1308                         else
1309                                 rx_status->flag &= ~RX_FLAG_FAILED_FCS_CRC;
1310
1311                         if (attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR)
1312                                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
1313                         else
1314                                 rx_status->flag &= ~RX_FLAG_MMIC_ERROR;
1315
1316                         hdr = ath10k_htt_rx_skb_get_hdr(msdu_head);
1317
1318                         if (ath10k_htt_rx_hdr_is_amsdu(hdr))
1319                                 ath10k_htt_rx_amsdu(htt, rx_status, msdu_head);
1320                         else
1321                                 ath10k_htt_rx_msdu(htt, rx_status, msdu_head);
1322                 }
1323         }
1324
1325         tasklet_schedule(&htt->rx_replenish_task);
1326 }
1327
1328 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1329                                        struct htt_rx_fragment_indication *frag)
1330 {
1331         struct ath10k *ar = htt->ar;
1332         struct sk_buff *msdu_head, *msdu_tail;
1333         enum htt_rx_mpdu_encrypt_type enctype;
1334         struct htt_rx_desc *rxd;
1335         enum rx_msdu_decap_format fmt;
1336         struct ieee80211_rx_status *rx_status = &htt->rx_status;
1337         struct ieee80211_hdr *hdr;
1338         int ret;
1339         bool tkip_mic_err;
1340         bool decrypt_err;
1341         u8 *fw_desc;
1342         int fw_desc_len, hdrlen, paramlen;
1343         int trim;
1344         u32 attention = 0;
1345
1346         fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
1347         fw_desc = (u8 *)frag->fw_msdu_rx_desc;
1348
1349         msdu_head = NULL;
1350         msdu_tail = NULL;
1351
1352         spin_lock_bh(&htt->rx_ring.lock);
1353         ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1354                                       &msdu_head, &msdu_tail,
1355                                       &attention);
1356         spin_unlock_bh(&htt->rx_ring.lock);
1357
1358         tasklet_schedule(&htt->rx_replenish_task);
1359
1360         ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1361
1362         if (ret) {
1363                 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1364                             ret);
1365                 ath10k_htt_rx_free_msdu_chain(msdu_head);
1366                 return;
1367         }
1368
1369         /* FIXME: implement signal strength */
1370         rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1371
1372         hdr = (struct ieee80211_hdr *)msdu_head->data;
1373         rxd = (void *)msdu_head->data - sizeof(*rxd);
1374         tkip_mic_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1375         decrypt_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1376         fmt = MS(__le32_to_cpu(rxd->msdu_start.info1),
1377                  RX_MSDU_START_INFO1_DECAP_FORMAT);
1378
1379         if (fmt != RX_MSDU_DECAP_RAW) {
1380                 ath10k_warn(ar, "we dont support non-raw fragmented rx yet\n");
1381                 dev_kfree_skb_any(msdu_head);
1382                 goto end;
1383         }
1384
1385         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1386                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1387         ath10k_htt_rx_h_protected(htt, rx_status, msdu_head, enctype, fmt,
1388                                   true);
1389         msdu_head->ip_summed = ath10k_htt_rx_get_csum_state(msdu_head);
1390
1391         if (tkip_mic_err)
1392                 ath10k_warn(ar, "tkip mic error\n");
1393
1394         if (decrypt_err) {
1395                 ath10k_warn(ar, "decryption err in fragmented rx\n");
1396                 dev_kfree_skb_any(msdu_head);
1397                 goto end;
1398         }
1399
1400         if (enctype != HTT_RX_MPDU_ENCRYPT_NONE) {
1401                 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1402                 paramlen = ath10k_htt_rx_crypto_param_len(ar, enctype);
1403
1404                 /* It is more efficient to move the header than the payload */
1405                 memmove((void *)msdu_head->data + paramlen,
1406                         (void *)msdu_head->data,
1407                         hdrlen);
1408                 skb_pull(msdu_head, paramlen);
1409                 hdr = (struct ieee80211_hdr *)msdu_head->data;
1410         }
1411
1412         /* remove trailing FCS */
1413         trim  = 4;
1414
1415         /* remove crypto trailer */
1416         trim += ath10k_htt_rx_crypto_tail_len(ar, enctype);
1417
1418         /* last fragment of TKIP frags has MIC */
1419         if (!ieee80211_has_morefrags(hdr->frame_control) &&
1420             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1421                 trim += MICHAEL_MIC_LEN;
1422
1423         if (trim > msdu_head->len) {
1424                 ath10k_warn(ar, "htt rx fragment: trailer longer than the frame itself? drop\n");
1425                 dev_kfree_skb_any(msdu_head);
1426                 goto end;
1427         }
1428
1429         skb_trim(msdu_head, msdu_head->len - trim);
1430
1431         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx frag mpdu: ",
1432                         msdu_head->data, msdu_head->len);
1433         ath10k_process_rx(htt->ar, rx_status, msdu_head);
1434
1435 end:
1436         if (fw_desc_len > 0) {
1437                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1438                            "expecting more fragmented rx in one indication %d\n",
1439                            fw_desc_len);
1440         }
1441 }
1442
1443 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
1444                                        struct sk_buff *skb)
1445 {
1446         struct ath10k_htt *htt = &ar->htt;
1447         struct htt_resp *resp = (struct htt_resp *)skb->data;
1448         struct htt_tx_done tx_done = {};
1449         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1450         __le16 msdu_id;
1451         int i;
1452
1453         lockdep_assert_held(&htt->tx_lock);
1454
1455         switch (status) {
1456         case HTT_DATA_TX_STATUS_NO_ACK:
1457                 tx_done.no_ack = true;
1458                 break;
1459         case HTT_DATA_TX_STATUS_OK:
1460                 break;
1461         case HTT_DATA_TX_STATUS_DISCARD:
1462         case HTT_DATA_TX_STATUS_POSTPONE:
1463         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1464                 tx_done.discard = true;
1465                 break;
1466         default:
1467                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1468                 tx_done.discard = true;
1469                 break;
1470         }
1471
1472         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1473                    resp->data_tx_completion.num_msdus);
1474
1475         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1476                 msdu_id = resp->data_tx_completion.msdus[i];
1477                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1478                 ath10k_txrx_tx_unref(htt, &tx_done);
1479         }
1480 }
1481
1482 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1483 {
1484         struct htt_rx_addba *ev = &resp->rx_addba;
1485         struct ath10k_peer *peer;
1486         struct ath10k_vif *arvif;
1487         u16 info0, tid, peer_id;
1488
1489         info0 = __le16_to_cpu(ev->info0);
1490         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1491         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1492
1493         ath10k_dbg(ar, ATH10K_DBG_HTT,
1494                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1495                    tid, peer_id, ev->window_size);
1496
1497         spin_lock_bh(&ar->data_lock);
1498         peer = ath10k_peer_find_by_id(ar, peer_id);
1499         if (!peer) {
1500                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1501                             peer_id);
1502                 spin_unlock_bh(&ar->data_lock);
1503                 return;
1504         }
1505
1506         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1507         if (!arvif) {
1508                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1509                             peer->vdev_id);
1510                 spin_unlock_bh(&ar->data_lock);
1511                 return;
1512         }
1513
1514         ath10k_dbg(ar, ATH10K_DBG_HTT,
1515                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1516                    peer->addr, tid, ev->window_size);
1517
1518         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1519         spin_unlock_bh(&ar->data_lock);
1520 }
1521
1522 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1523 {
1524         struct htt_rx_delba *ev = &resp->rx_delba;
1525         struct ath10k_peer *peer;
1526         struct ath10k_vif *arvif;
1527         u16 info0, tid, peer_id;
1528
1529         info0 = __le16_to_cpu(ev->info0);
1530         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1531         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1532
1533         ath10k_dbg(ar, ATH10K_DBG_HTT,
1534                    "htt rx delba tid %hu peer_id %hu\n",
1535                    tid, peer_id);
1536
1537         spin_lock_bh(&ar->data_lock);
1538         peer = ath10k_peer_find_by_id(ar, peer_id);
1539         if (!peer) {
1540                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1541                             peer_id);
1542                 spin_unlock_bh(&ar->data_lock);
1543                 return;
1544         }
1545
1546         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1547         if (!arvif) {
1548                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1549                             peer->vdev_id);
1550                 spin_unlock_bh(&ar->data_lock);
1551                 return;
1552         }
1553
1554         ath10k_dbg(ar, ATH10K_DBG_HTT,
1555                    "htt rx stop rx ba session sta %pM tid %hu\n",
1556                    peer->addr, tid);
1557
1558         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1559         spin_unlock_bh(&ar->data_lock);
1560 }
1561
1562 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
1563 {
1564         struct ath10k_htt *htt = &ar->htt;
1565         struct htt_resp *resp = (struct htt_resp *)skb->data;
1566
1567         /* confirm alignment */
1568         if (!IS_ALIGNED((unsigned long)skb->data, 4))
1569                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
1570
1571         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
1572                    resp->hdr.msg_type);
1573         switch (resp->hdr.msg_type) {
1574         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
1575                 htt->target_version_major = resp->ver_resp.major;
1576                 htt->target_version_minor = resp->ver_resp.minor;
1577                 complete(&htt->target_version_received);
1578                 break;
1579         }
1580         case HTT_T2H_MSG_TYPE_RX_IND:
1581                 spin_lock_bh(&htt->rx_ring.lock);
1582                 __skb_queue_tail(&htt->rx_compl_q, skb);
1583                 spin_unlock_bh(&htt->rx_ring.lock);
1584                 tasklet_schedule(&htt->txrx_compl_task);
1585                 return;
1586         case HTT_T2H_MSG_TYPE_PEER_MAP: {
1587                 struct htt_peer_map_event ev = {
1588                         .vdev_id = resp->peer_map.vdev_id,
1589                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
1590                 };
1591                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
1592                 ath10k_peer_map_event(htt, &ev);
1593                 break;
1594         }
1595         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
1596                 struct htt_peer_unmap_event ev = {
1597                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
1598                 };
1599                 ath10k_peer_unmap_event(htt, &ev);
1600                 break;
1601         }
1602         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
1603                 struct htt_tx_done tx_done = {};
1604                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
1605
1606                 tx_done.msdu_id =
1607                         __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
1608
1609                 switch (status) {
1610                 case HTT_MGMT_TX_STATUS_OK:
1611                         break;
1612                 case HTT_MGMT_TX_STATUS_RETRY:
1613                         tx_done.no_ack = true;
1614                         break;
1615                 case HTT_MGMT_TX_STATUS_DROP:
1616                         tx_done.discard = true;
1617                         break;
1618                 }
1619
1620                 spin_lock_bh(&htt->tx_lock);
1621                 ath10k_txrx_tx_unref(htt, &tx_done);
1622                 spin_unlock_bh(&htt->tx_lock);
1623                 break;
1624         }
1625         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
1626                 spin_lock_bh(&htt->tx_lock);
1627                 __skb_queue_tail(&htt->tx_compl_q, skb);
1628                 spin_unlock_bh(&htt->tx_lock);
1629                 tasklet_schedule(&htt->txrx_compl_task);
1630                 return;
1631         case HTT_T2H_MSG_TYPE_SEC_IND: {
1632                 struct ath10k *ar = htt->ar;
1633                 struct htt_security_indication *ev = &resp->security_indication;
1634
1635                 ath10k_dbg(ar, ATH10K_DBG_HTT,
1636                            "sec ind peer_id %d unicast %d type %d\n",
1637                           __le16_to_cpu(ev->peer_id),
1638                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
1639                           MS(ev->flags, HTT_SECURITY_TYPE));
1640                 complete(&ar->install_key_done);
1641                 break;
1642         }
1643         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
1644                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1645                                 skb->data, skb->len);
1646                 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
1647                 break;
1648         }
1649         case HTT_T2H_MSG_TYPE_TEST:
1650                 /* FIX THIS */
1651                 break;
1652         case HTT_T2H_MSG_TYPE_STATS_CONF:
1653                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
1654                 break;
1655         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
1656                 /* Firmware can return tx frames if it's unable to fully
1657                  * process them and suspects host may be able to fix it. ath10k
1658                  * sends all tx frames as already inspected so this shouldn't
1659                  * happen unless fw has a bug.
1660                  */
1661                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
1662                 break;
1663         case HTT_T2H_MSG_TYPE_RX_ADDBA:
1664                 ath10k_htt_rx_addba(ar, resp);
1665                 break;
1666         case HTT_T2H_MSG_TYPE_RX_DELBA:
1667                 ath10k_htt_rx_delba(ar, resp);
1668                 break;
1669         case HTT_T2H_MSG_TYPE_PKTLOG: {
1670                 struct ath10k_pktlog_hdr *hdr =
1671                         (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;
1672
1673                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
1674                                         sizeof(*hdr) +
1675                                         __le16_to_cpu(hdr->size));
1676                 break;
1677         }
1678         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
1679                 /* Ignore this event because mac80211 takes care of Rx
1680                  * aggregation reordering.
1681                  */
1682                 break;
1683         }
1684         default:
1685                 ath10k_warn(ar, "htt event (%d) not handled\n",
1686                             resp->hdr.msg_type);
1687                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
1688                                 skb->data, skb->len);
1689                 break;
1690         };
1691
1692         /* Free the indication buffer */
1693         dev_kfree_skb_any(skb);
1694 }
1695
1696 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
1697 {
1698         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
1699         struct htt_resp *resp;
1700         struct sk_buff *skb;
1701
1702         spin_lock_bh(&htt->tx_lock);
1703         while ((skb = __skb_dequeue(&htt->tx_compl_q))) {
1704                 ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
1705                 dev_kfree_skb_any(skb);
1706         }
1707         spin_unlock_bh(&htt->tx_lock);
1708
1709         spin_lock_bh(&htt->rx_ring.lock);
1710         while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
1711                 resp = (struct htt_resp *)skb->data;
1712                 ath10k_htt_rx_handler(htt, &resp->rx_ind);
1713                 dev_kfree_skb_any(skb);
1714         }
1715         spin_unlock_bh(&htt->rx_ring.lock);
1716 }