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