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 #define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
  29 #define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
  30
  31 /* when under memory pressure rx ring refill may fail and needs a retry */
  32 #define HTT_RX_RING_REFILL_RETRY_MS 50
  33
  34 #define HTT_RX_RING_REFILL_RESCHED_MS 5
  35
  36 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
  37 static void ath10k_htt_txrx_compl_task(unsigned long ptr);
  38
  39 static struct sk_buff *
  40 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 paddr)
  41 {
  42         struct ath10k_skb_rxcb *rxcb;
  43
  44         hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
  45                 if (rxcb->paddr == paddr)
  46                         return ATH10K_RXCB_SKB(rxcb);
  47
  48         WARN_ON_ONCE(1);
  49         return NULL;
  50 }
  51
  52 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
  53 {
  54         struct sk_buff *skb;
  55         struct ath10k_skb_rxcb *rxcb;
  56         struct hlist_node *n;
  57         int i;
  58
  59         if (htt->rx_ring.in_ord_rx) {
  60                 hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
  61                         skb = ATH10K_RXCB_SKB(rxcb);
  62                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  63                                          skb->len + skb_tailroom(skb),
  64                                          DMA_FROM_DEVICE);
  65                         hash_del(&rxcb->hlist);
  66                         dev_kfree_skb_any(skb);
  67                 }
  68         } else {
  69                 for (i = 0; i < htt->rx_ring.size; i++) {
  70                         skb = htt->rx_ring.netbufs_ring[i];
  71                         if (!skb)
  72                                 continue;
  73
  74                         rxcb = ATH10K_SKB_RXCB(skb);
  75                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  76                                          skb->len + skb_tailroom(skb),
  77                                          DMA_FROM_DEVICE);
  78                         dev_kfree_skb_any(skb);
  79                 }
  80         }
  81
  82         htt->rx_ring.fill_cnt = 0;
  83         hash_init(htt->rx_ring.skb_table);
  84         memset(htt->rx_ring.netbufs_ring, 0,
  85                htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
  86 }
  87
  88 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
  89 {
  90         struct htt_rx_desc *rx_desc;
  91         struct ath10k_skb_rxcb *rxcb;
  92         struct sk_buff *skb;
  93         dma_addr_t paddr;
  94         int ret = 0, idx;
  95
  96         /* The Full Rx Reorder firmware has no way of telling the host
  97          * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
  98          * To keep things simple make sure ring is always half empty. This
  99          * guarantees there'll be no replenishment overruns possible.
 100          */
 101         BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
 102
 103         idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
 104         while (num > 0) {
 105                 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
 106                 if (!skb) {
 107                         ret = -ENOMEM;
 108                         goto fail;
 109                 }
 110
 111                 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
 112                         skb_pull(skb,
 113                                  PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
 114                                  skb->data);
 115
 116                 /* Clear rx_desc attention word before posting to Rx ring */
 117                 rx_desc = (struct htt_rx_desc *)skb->data;
 118                 rx_desc->attention.flags = __cpu_to_le32(0);
 119
 120                 paddr = dma_map_single(htt->ar->dev, skb->data,
 121                                        skb->len + skb_tailroom(skb),
 122                                        DMA_FROM_DEVICE);
 123
 124                 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
 125                         dev_kfree_skb_any(skb);
 126                         ret = -ENOMEM;
 127                         goto fail;
 128                 }
 129
 130                 rxcb = ATH10K_SKB_RXCB(skb);
 131                 rxcb->paddr = paddr;
 132                 htt->rx_ring.netbufs_ring[idx] = skb;
 133                 htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
 134                 htt->rx_ring.fill_cnt++;
 135
 136                 if (htt->rx_ring.in_ord_rx) {
 137                         hash_add(htt->rx_ring.skb_table,
 138                                  &ATH10K_SKB_RXCB(skb)->hlist,
 139                                  (u32)paddr);
 140                 }
 141
 142                 num--;
 143                 idx++;
 144                 idx &= htt->rx_ring.size_mask;
 145         }
 146
 147 fail:
 148         /*
 149          * Make sure the rx buffer is updated before available buffer
 150          * index to avoid any potential rx ring corruption.
 151          */
 152         mb();
 153         *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
 154         return ret;
 155 }
 156
 157 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 158 {
 159         lockdep_assert_held(&htt->rx_ring.lock);
 160         return __ath10k_htt_rx_ring_fill_n(htt, num);
 161 }
 162
 163 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
 164 {
 165         int ret, num_deficit, num_to_fill;
 166
 167         /* Refilling the whole RX ring buffer proves to be a bad idea. The
 168          * reason is RX may take up significant amount of CPU cycles and starve
 169          * other tasks, e.g. TX on an ethernet device while acting as a bridge
 170          * with ath10k wlan interface. This ended up with very poor performance
 171          * once CPU the host system was overwhelmed with RX on ath10k.
 172          *
 173          * By limiting the number of refills the replenishing occurs
 174          * progressively. This in turns makes use of the fact tasklets are
 175          * processed in FIFO order. This means actual RX processing can starve
 176          * out refilling. If there's not enough buffers on RX ring FW will not
 177          * report RX until it is refilled with enough buffers. This
 178          * automatically balances load wrt to CPU power.
 179          *
 180          * This probably comes at a cost of lower maximum throughput but
 181          * improves the average and stability. */
 182         spin_lock_bh(&htt->rx_ring.lock);
 183         num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
 184         num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
 185         num_deficit -= num_to_fill;
 186         ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
 187         if (ret == -ENOMEM) {
 188                 /*
 189                  * Failed to fill it to the desired level -
 190                  * we'll start a timer and try again next time.
 191                  * As long as enough buffers are left in the ring for
 192                  * another A-MPDU rx, no special recovery is needed.
 193                  */
 194                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 195                           msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
 196         } else if (num_deficit > 0) {
 197                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 198                           msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
 199         }
 200         spin_unlock_bh(&htt->rx_ring.lock);
 201 }
 202
 203 static void ath10k_htt_rx_ring_refill_retry(unsigned long arg)
 204 {
 205         struct ath10k_htt *htt = (struct ath10k_htt *)arg;
 206
 207         ath10k_htt_rx_msdu_buff_replenish(htt);
 208 }
 209
 210 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
 211 {
 212         struct ath10k_htt *htt = &ar->htt;
 213         int ret;
 214
 215         spin_lock_bh(&htt->rx_ring.lock);
 216         ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
 217                                               htt->rx_ring.fill_cnt));
 218         spin_unlock_bh(&htt->rx_ring.lock);
 219
 220         if (ret)
 221                 ath10k_htt_rx_ring_free(htt);
 222
 223         return ret;
 224 }
 225
 226 void ath10k_htt_rx_free(struct ath10k_htt *htt)
 227 {
 228         del_timer_sync(&htt->rx_ring.refill_retry_timer);
 229         tasklet_kill(&htt->txrx_compl_task);
 230
 231         skb_queue_purge(&htt->rx_compl_q);
 232         skb_queue_purge(&htt->rx_in_ord_compl_q);
 233         skb_queue_purge(&htt->tx_fetch_ind_q);
 234
 235         ath10k_htt_rx_ring_free(htt);
 236
 237         dma_free_coherent(htt->ar->dev,
 238                           (htt->rx_ring.size *
 239                            sizeof(htt->rx_ring.paddrs_ring)),
 240                           htt->rx_ring.paddrs_ring,
 241                           htt->rx_ring.base_paddr);
 242
 243         dma_free_coherent(htt->ar->dev,
 244                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 245                           htt->rx_ring.alloc_idx.vaddr,
 246                           htt->rx_ring.alloc_idx.paddr);
 247
 248         kfree(htt->rx_ring.netbufs_ring);
 249 }
 250
 251 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 252 {
 253         struct ath10k *ar = htt->ar;
 254         int idx;
 255         struct sk_buff *msdu;
 256
 257         lockdep_assert_held(&htt->rx_ring.lock);
 258
 259         if (htt->rx_ring.fill_cnt == 0) {
 260                 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
 261                 return NULL;
 262         }
 263
 264         idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 265         msdu = htt->rx_ring.netbufs_ring[idx];
 266         htt->rx_ring.netbufs_ring[idx] = NULL;
 267         htt->rx_ring.paddrs_ring[idx] = 0;
 268
 269         idx++;
 270         idx &= htt->rx_ring.size_mask;
 271         htt->rx_ring.sw_rd_idx.msdu_payld = idx;
 272         htt->rx_ring.fill_cnt--;
 273
 274         dma_unmap_single(htt->ar->dev,
 275                          ATH10K_SKB_RXCB(msdu)->paddr,
 276                          msdu->len + skb_tailroom(msdu),
 277                          DMA_FROM_DEVICE);
 278         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 279                         msdu->data, msdu->len + skb_tailroom(msdu));
 280
 281         return msdu;
 282 }
 283
 284 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 285 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 286                                    struct sk_buff_head *amsdu)
 287 {
 288         struct ath10k *ar = htt->ar;
 289         int msdu_len, msdu_chaining = 0;
 290         struct sk_buff *msdu;
 291         struct htt_rx_desc *rx_desc;
 292
 293         lockdep_assert_held(&htt->rx_ring.lock);
 294
 295         for (;;) {
 296                 int last_msdu, msdu_len_invalid, msdu_chained;
 297
 298                 msdu = ath10k_htt_rx_netbuf_pop(htt);
 299                 if (!msdu) {
 300                         __skb_queue_purge(amsdu);
 301                         return -ENOENT;
 302                 }
 303
 304                 __skb_queue_tail(amsdu, msdu);
 305
 306                 rx_desc = (struct htt_rx_desc *)msdu->data;
 307
 308                 /* FIXME: we must report msdu payload since this is what caller
 309                  *        expects now */
 310                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 311                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 312
 313                 /*
 314                  * Sanity check - confirm the HW is finished filling in the
 315                  * rx data.
 316                  * If the HW and SW are working correctly, then it's guaranteed
 317                  * that the HW's MAC DMA is done before this point in the SW.
 318                  * To prevent the case that we handle a stale Rx descriptor,
 319                  * just assert for now until we have a way to recover.
 320                  */
 321                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 322                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 323                         __skb_queue_purge(amsdu);
 324                         return -EIO;
 325                 }
 326
 327                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 328                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 329                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 330                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
 331                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 332                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 333
 334                 if (msdu_len_invalid)
 335                         msdu_len = 0;
 336
 337                 skb_trim(msdu, 0);
 338                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 339                 msdu_len -= msdu->len;
 340
 341                 /* Note: Chained buffers do not contain rx descriptor */
 342                 while (msdu_chained--) {
 343                         msdu = ath10k_htt_rx_netbuf_pop(htt);
 344                         if (!msdu) {
 345                                 __skb_queue_purge(amsdu);
 346                                 return -ENOENT;
 347                         }
 348
 349                         __skb_queue_tail(amsdu, msdu);
 350                         skb_trim(msdu, 0);
 351                         skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
 352                         msdu_len -= msdu->len;
 353                         msdu_chaining = 1;
 354                 }
 355
 356                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
 357                                 RX_MSDU_END_INFO0_LAST_MSDU;
 358
 359                 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
 360                                          sizeof(*rx_desc) - sizeof(u32));
 361
 362                 if (last_msdu)
 363                         break;
 364         }
 365
 366         if (skb_queue_empty(amsdu))
 367                 msdu_chaining = -1;
 368
 369         /*
 370          * Don't refill the ring yet.
 371          *
 372          * First, the elements popped here are still in use - it is not
 373          * safe to overwrite them until the matching call to
 374          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 375          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 376          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 377          * (something like 3 buffers). Consequently, we'll rely on the txrx
 378          * SW to tell us when it is done pulling all the PPDU's rx buffers
 379          * out of the rx ring, and then refill it just once.
 380          */
 381
 382         return msdu_chaining;
 383 }
 384
 385 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
 386                                                u32 paddr)
 387 {
 388         struct ath10k *ar = htt->ar;
 389         struct ath10k_skb_rxcb *rxcb;
 390         struct sk_buff *msdu;
 391
 392         lockdep_assert_held(&htt->rx_ring.lock);
 393
 394         msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
 395         if (!msdu)
 396                 return NULL;
 397
 398         rxcb = ATH10K_SKB_RXCB(msdu);
 399         hash_del(&rxcb->hlist);
 400         htt->rx_ring.fill_cnt--;
 401
 402         dma_unmap_single(htt->ar->dev, rxcb->paddr,
 403                          msdu->len + skb_tailroom(msdu),
 404                          DMA_FROM_DEVICE);
 405         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 406                         msdu->data, msdu->len + skb_tailroom(msdu));
 407
 408         return msdu;
 409 }
 410
 411 static int ath10k_htt_rx_pop_paddr_list(struct ath10k_htt *htt,
 412                                         struct htt_rx_in_ord_ind *ev,
 413                                         struct sk_buff_head *list)
 414 {
 415         struct ath10k *ar = htt->ar;
 416         struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs;
 417         struct htt_rx_desc *rxd;
 418         struct sk_buff *msdu;
 419         int msdu_count;
 420         bool is_offload;
 421         u32 paddr;
 422
 423         lockdep_assert_held(&htt->rx_ring.lock);
 424
 425         msdu_count = __le16_to_cpu(ev->msdu_count);
 426         is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
 427
 428         while (msdu_count--) {
 429                 paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
 430
 431                 msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
 432                 if (!msdu) {
 433                         __skb_queue_purge(list);
 434                         return -ENOENT;
 435                 }
 436
 437                 __skb_queue_tail(list, msdu);
 438
 439                 if (!is_offload) {
 440                         rxd = (void *)msdu->data;
 441
 442                         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 443
 444                         skb_put(msdu, sizeof(*rxd));
 445                         skb_pull(msdu, sizeof(*rxd));
 446                         skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
 447
 448                         if (!(__le32_to_cpu(rxd->attention.flags) &
 449                               RX_ATTENTION_FLAGS_MSDU_DONE)) {
 450                                 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
 451                                 return -EIO;
 452                         }
 453                 }
 454
 455                 msdu_desc++;
 456         }
 457
 458         return 0;
 459 }
 460
 461 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 462 {
 463         struct ath10k *ar = htt->ar;
 464         dma_addr_t paddr;
 465         void *vaddr;
 466         size_t size;
 467         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 468
 469         htt->rx_confused = false;
 470
 471         /* XXX: The fill level could be changed during runtime in response to
 472          * the host processing latency. Is this really worth it?
 473          */
 474         htt->rx_ring.size = HTT_RX_RING_SIZE;
 475         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 476         htt->rx_ring.fill_level = HTT_RX_RING_FILL_LEVEL;
 477
 478         if (!is_power_of_2(htt->rx_ring.size)) {
 479                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 480                 return -EINVAL;
 481         }
 482
 483         htt->rx_ring.netbufs_ring =
 484                 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
 485                         GFP_KERNEL);
 486         if (!htt->rx_ring.netbufs_ring)
 487                 goto err_netbuf;
 488
 489         size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
 490
 491         vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
 492         if (!vaddr)
 493                 goto err_dma_ring;
 494
 495         htt->rx_ring.paddrs_ring = vaddr;
 496         htt->rx_ring.base_paddr = paddr;
 497
 498         vaddr = dma_alloc_coherent(htt->ar->dev,
 499                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 500                                    &paddr, GFP_KERNEL);
 501         if (!vaddr)
 502                 goto err_dma_idx;
 503
 504         htt->rx_ring.alloc_idx.vaddr = vaddr;
 505         htt->rx_ring.alloc_idx.paddr = paddr;
 506         htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
 507         *htt->rx_ring.alloc_idx.vaddr = 0;
 508
 509         /* Initialize the Rx refill retry timer */
 510         setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
 511
 512         spin_lock_init(&htt->rx_ring.lock);
 513
 514         htt->rx_ring.fill_cnt = 0;
 515         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 516         hash_init(htt->rx_ring.skb_table);
 517
 518         skb_queue_head_init(&htt->rx_compl_q);
 519         skb_queue_head_init(&htt->rx_in_ord_compl_q);
 520         skb_queue_head_init(&htt->tx_fetch_ind_q);
 521         atomic_set(&htt->num_mpdus_ready, 0);
 522
 523         tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
 524                      (unsigned long)htt);
 525
 526         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 527                    htt->rx_ring.size, htt->rx_ring.fill_level);
 528         return 0;
 529
 530 err_dma_idx:
 531         dma_free_coherent(htt->ar->dev,
 532                           (htt->rx_ring.size *
 533                            sizeof(htt->rx_ring.paddrs_ring)),
 534                           htt->rx_ring.paddrs_ring,
 535                           htt->rx_ring.base_paddr);
 536 err_dma_ring:
 537         kfree(htt->rx_ring.netbufs_ring);
 538 err_netbuf:
 539         return -ENOMEM;
 540 }
 541
 542 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 543                                           enum htt_rx_mpdu_encrypt_type type)
 544 {
 545         switch (type) {
 546         case HTT_RX_MPDU_ENCRYPT_NONE:
 547                 return 0;
 548         case HTT_RX_MPDU_ENCRYPT_WEP40:
 549         case HTT_RX_MPDU_ENCRYPT_WEP104:
 550                 return IEEE80211_WEP_IV_LEN;
 551         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 552         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 553                 return IEEE80211_TKIP_IV_LEN;
 554         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 555                 return IEEE80211_CCMP_HDR_LEN;
 556         case HTT_RX_MPDU_ENCRYPT_WEP128:
 557         case HTT_RX_MPDU_ENCRYPT_WAPI:
 558                 break;
 559         }
 560
 561         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 562         return 0;
 563 }
 564
 565 #define MICHAEL_MIC_LEN 8
 566
 567 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
 568                                          enum htt_rx_mpdu_encrypt_type type)
 569 {
 570         switch (type) {
 571         case HTT_RX_MPDU_ENCRYPT_NONE:
 572                 return 0;
 573         case HTT_RX_MPDU_ENCRYPT_WEP40:
 574         case HTT_RX_MPDU_ENCRYPT_WEP104:
 575                 return IEEE80211_WEP_ICV_LEN;
 576         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 577         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 578                 return IEEE80211_TKIP_ICV_LEN;
 579         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 580                 return IEEE80211_CCMP_MIC_LEN;
 581         case HTT_RX_MPDU_ENCRYPT_WEP128:
 582         case HTT_RX_MPDU_ENCRYPT_WAPI:
 583                 break;
 584         }
 585
 586         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 587         return 0;
 588 }
 589
 590 struct amsdu_subframe_hdr {
 591         u8 dst[ETH_ALEN];
 592         u8 src[ETH_ALEN];
 593         __be16 len;
 594 } __packed;
 595
 596 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
 597
 598 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 599                                   struct ieee80211_rx_status *status,
 600                                   struct htt_rx_desc *rxd)
 601 {
 602         struct ieee80211_supported_band *sband;
 603         u8 cck, rate, bw, sgi, mcs, nss;
 604         u8 preamble = 0;
 605         u8 group_id;
 606         u32 info1, info2, info3;
 607
 608         info1 = __le32_to_cpu(rxd->ppdu_start.info1);
 609         info2 = __le32_to_cpu(rxd->ppdu_start.info2);
 610         info3 = __le32_to_cpu(rxd->ppdu_start.info3);
 611
 612         preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
 613
 614         switch (preamble) {
 615         case HTT_RX_LEGACY:
 616                 /* To get legacy rate index band is required. Since band can't
 617                  * be undefined check if freq is non-zero.
 618                  */
 619                 if (!status->freq)
 620                         return;
 621
 622                 cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
 623                 rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
 624                 rate &= ~RX_PPDU_START_RATE_FLAG;
 625
 626                 sband = &ar->mac.sbands[status->band];
 627                 status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
 628                 break;
 629         case HTT_RX_HT:
 630         case HTT_RX_HT_WITH_TXBF:
 631                 /* HT-SIG - Table 20-11 in info2 and info3 */
 632                 mcs = info2 & 0x1F;
 633                 nss = mcs >> 3;
 634                 bw = (info2 >> 7) & 1;
 635                 sgi = (info3 >> 7) & 1;
 636
 637                 status->rate_idx = mcs;
 638                 status->flag |= RX_FLAG_HT;
 639                 if (sgi)
 640                         status->flag |= RX_FLAG_SHORT_GI;
 641                 if (bw)
 642                         status->flag |= RX_FLAG_40MHZ;
 643                 break;
 644         case HTT_RX_VHT:
 645         case HTT_RX_VHT_WITH_TXBF:
 646                 /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
 647                    TODO check this */
 648                 bw = info2 & 3;
 649                 sgi = info3 & 1;
 650                 group_id = (info2 >> 4) & 0x3F;
 651
 652                 if (GROUP_ID_IS_SU_MIMO(group_id)) {
 653                         mcs = (info3 >> 4) & 0x0F;
 654                         nss = ((info2 >> 10) & 0x07) + 1;
 655                 } else {
 656                         /* Hardware doesn't decode VHT-SIG-B into Rx descriptor
 657                          * so it's impossible to decode MCS. Also since
 658                          * firmware consumes Group Id Management frames host
 659                          * has no knowledge regarding group/user position
 660                          * mapping so it's impossible to pick the correct Nsts
 661                          * from VHT-SIG-A1.
 662                          *
 663                          * Bandwidth and SGI are valid so report the rateinfo
 664                          * on best-effort basis.
 665                          */
 666                         mcs = 0;
 667                         nss = 1;
 668                 }
 669
 670                 if (mcs > 0x09) {
 671                         ath10k_warn(ar, "invalid MCS received %u\n", mcs);
 672                         ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
 673                                     __le32_to_cpu(rxd->attention.flags),
 674                                     __le32_to_cpu(rxd->mpdu_start.info0),
 675                                     __le32_to_cpu(rxd->mpdu_start.info1),
 676                                     __le32_to_cpu(rxd->msdu_start.common.info0),
 677                                     __le32_to_cpu(rxd->msdu_start.common.info1),
 678                                     rxd->ppdu_start.info0,
 679                                     __le32_to_cpu(rxd->ppdu_start.info1),
 680                                     __le32_to_cpu(rxd->ppdu_start.info2),
 681                                     __le32_to_cpu(rxd->ppdu_start.info3),
 682                                     __le32_to_cpu(rxd->ppdu_start.info4));
 683
 684                         ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
 685                                     __le32_to_cpu(rxd->msdu_end.common.info0),
 686                                     __le32_to_cpu(rxd->mpdu_end.info0));
 687
 688                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
 689                                         "rx desc msdu payload: ",
 690                                         rxd->msdu_payload, 50);
 691                 }
 692
 693                 status->rate_idx = mcs;
 694                 status->vht_nss = nss;
 695
 696                 if (sgi)
 697                         status->flag |= RX_FLAG_SHORT_GI;
 698
 699                 switch (bw) {
 700                 /* 20MHZ */
 701                 case 0:
 702                         break;
 703                 /* 40MHZ */
 704                 case 1:
 705                         status->flag |= RX_FLAG_40MHZ;
 706                         break;
 707                 /* 80MHZ */
 708                 case 2:
 709                         status->vht_flag |= RX_VHT_FLAG_80MHZ;
 710                 }
 711
 712                 status->flag |= RX_FLAG_VHT;
 713                 break;
 714         default:
 715                 break;
 716         }
 717 }
 718
 719 static struct ieee80211_channel *
 720 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
 721 {
 722         struct ath10k_peer *peer;
 723         struct ath10k_vif *arvif;
 724         struct cfg80211_chan_def def;
 725         u16 peer_id;
 726
 727         lockdep_assert_held(&ar->data_lock);
 728
 729         if (!rxd)
 730                 return NULL;
 731
 732         if (rxd->attention.flags &
 733             __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
 734                 return NULL;
 735
 736         if (!(rxd->msdu_end.common.info0 &
 737               __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
 738                 return NULL;
 739
 740         peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
 741                      RX_MPDU_START_INFO0_PEER_IDX);
 742
 743         peer = ath10k_peer_find_by_id(ar, peer_id);
 744         if (!peer)
 745                 return NULL;
 746
 747         arvif = ath10k_get_arvif(ar, peer->vdev_id);
 748         if (WARN_ON_ONCE(!arvif))
 749                 return NULL;
 750
 751         if (WARN_ON(ath10k_mac_vif_chan(arvif->vif, &def)))
 752                 return NULL;
 753
 754         return def.chan;
 755 }
 756
 757 static struct ieee80211_channel *
 758 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
 759 {
 760         struct ath10k_vif *arvif;
 761         struct cfg80211_chan_def def;
 762
 763         lockdep_assert_held(&ar->data_lock);
 764
 765         list_for_each_entry(arvif, &ar->arvifs, list) {
 766                 if (arvif->vdev_id == vdev_id &&
 767                     ath10k_mac_vif_chan(arvif->vif, &def) == 0)
 768                         return def.chan;
 769         }
 770
 771         return NULL;
 772 }
 773
 774 static void
 775 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
 776                               struct ieee80211_chanctx_conf *conf,
 777                               void *data)
 778 {
 779         struct cfg80211_chan_def *def = data;
 780
 781         *def = conf->def;
 782 }
 783
 784 static struct ieee80211_channel *
 785 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
 786 {
 787         struct cfg80211_chan_def def = {};
 788
 789         ieee80211_iter_chan_contexts_atomic(ar->hw,
 790                                             ath10k_htt_rx_h_any_chan_iter,
 791                                             &def);
 792
 793         return def.chan;
 794 }
 795
 796 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
 797                                     struct ieee80211_rx_status *status,
 798                                     struct htt_rx_desc *rxd,
 799                                     u32 vdev_id)
 800 {
 801         struct ieee80211_channel *ch;
 802
 803         spin_lock_bh(&ar->data_lock);
 804         ch = ar->scan_channel;
 805         if (!ch)
 806                 ch = ar->rx_channel;
 807         if (!ch)
 808                 ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
 809         if (!ch)
 810                 ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
 811         if (!ch)
 812                 ch = ath10k_htt_rx_h_any_channel(ar);
 813         if (!ch)
 814                 ch = ar->tgt_oper_chan;
 815         spin_unlock_bh(&ar->data_lock);
 816
 817         if (!ch)
 818                 return false;
 819
 820         status->band = ch->band;
 821         status->freq = ch->center_freq;
 822
 823         return true;
 824 }
 825
 826 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
 827                                    struct ieee80211_rx_status *status,
 828                                    struct htt_rx_desc *rxd)
 829 {
 830         /* FIXME: Get real NF */
 831         status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
 832                          rxd->ppdu_start.rssi_comb;
 833         status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
 834 }
 835
 836 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
 837                                     struct ieee80211_rx_status *status,
 838                                     struct htt_rx_desc *rxd)
 839 {
 840         /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
 841          * means all prior MSDUs in a PPDU are reported to mac80211 without the
 842          * TSF. Is it worth holding frames until end of PPDU is known?
 843          *
 844          * FIXME: Can we get/compute 64bit TSF?
 845          */
 846         status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
 847         status->flag |= RX_FLAG_MACTIME_END;
 848 }
 849
 850 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
 851                                  struct sk_buff_head *amsdu,
 852                                  struct ieee80211_rx_status *status,
 853                                  u32 vdev_id)
 854 {
 855         struct sk_buff *first;
 856         struct htt_rx_desc *rxd;
 857         bool is_first_ppdu;
 858         bool is_last_ppdu;
 859
 860         if (skb_queue_empty(amsdu))
 861                 return;
 862
 863         first = skb_peek(amsdu);
 864         rxd = (void *)first->data - sizeof(*rxd);
 865
 866         is_first_ppdu = !!(rxd->attention.flags &
 867                            __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
 868         is_last_ppdu = !!(rxd->attention.flags &
 869                           __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
 870
 871         if (is_first_ppdu) {
 872                 /* New PPDU starts so clear out the old per-PPDU status. */
 873                 status->freq = 0;
 874                 status->rate_idx = 0;
 875                 status->vht_nss = 0;
 876                 status->vht_flag &= ~RX_VHT_FLAG_80MHZ;
 877                 status->flag &= ~(RX_FLAG_HT |
 878                                   RX_FLAG_VHT |
 879                                   RX_FLAG_SHORT_GI |
 880                                   RX_FLAG_40MHZ |
 881                                   RX_FLAG_MACTIME_END);
 882                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
 883
 884                 ath10k_htt_rx_h_signal(ar, status, rxd);
 885                 ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
 886                 ath10k_htt_rx_h_rates(ar, status, rxd);
 887         }
 888
 889         if (is_last_ppdu)
 890                 ath10k_htt_rx_h_mactime(ar, status, rxd);
 891 }
 892
 893 static const char * const tid_to_ac[] = {
 894         "BE",
 895         "BK",
 896         "BK",
 897         "BE",
 898         "VI",
 899         "VI",
 900         "VO",
 901         "VO",
 902 };
 903
 904 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
 905 {
 906         u8 *qc;
 907         int tid;
 908
 909         if (!ieee80211_is_data_qos(hdr->frame_control))
 910                 return "";
 911
 912         qc = ieee80211_get_qos_ctl(hdr);
 913         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
 914         if (tid < 8)
 915                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
 916         else
 917                 snprintf(out, size, "tid %d", tid);
 918
 919         return out;
 920 }
 921
 922 static void ath10k_process_rx(struct ath10k *ar,
 923                               struct ieee80211_rx_status *rx_status,
 924                               struct sk_buff *skb)
 925 {
 926         struct ieee80211_rx_status *status;
 927         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 928         char tid[32];
 929
 930         status = IEEE80211_SKB_RXCB(skb);
 931         *status = *rx_status;
 932
 933         ath10k_dbg(ar, ATH10K_DBG_DATA,
 934                    "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%llx fcs-err %i mic-err %i amsdu-more %i\n",
 935                    skb,
 936                    skb->len,
 937                    ieee80211_get_SA(hdr),
 938                    ath10k_get_tid(hdr, tid, sizeof(tid)),
 939                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
 940                                                         "mcast" : "ucast",
 941                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
 942                    status->flag == 0 ? "legacy" : "",
 943                    status->flag & RX_FLAG_HT ? "ht" : "",
 944                    status->flag & RX_FLAG_VHT ? "vht" : "",
 945                    status->flag & RX_FLAG_40MHZ ? "40" : "",
 946                    status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
 947                    status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
 948                    status->rate_idx,
 949                    status->vht_nss,
 950                    status->freq,
 951                    status->band, status->flag,
 952                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
 953                    !!(status->flag & RX_FLAG_MMIC_ERROR),
 954                    !!(status->flag & RX_FLAG_AMSDU_MORE));
 955         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
 956                         skb->data, skb->len);
 957         trace_ath10k_rx_hdr(ar, skb->data, skb->len);
 958         trace_ath10k_rx_payload(ar, skb->data, skb->len);
 959
 960         ieee80211_rx(ar->hw, skb);
 961 }
 962
 963 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
 964                                       struct ieee80211_hdr *hdr)
 965 {
 966         int len = ieee80211_hdrlen(hdr->frame_control);
 967
 968         if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
 969                       ar->running_fw->fw_file.fw_features))
 970                 len = round_up(len, 4);
 971
 972         return len;
 973 }
 974
 975 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
 976                                         struct sk_buff *msdu,
 977                                         struct ieee80211_rx_status *status,
 978                                         enum htt_rx_mpdu_encrypt_type enctype,
 979                                         bool is_decrypted)
 980 {
 981         struct ieee80211_hdr *hdr;
 982         struct htt_rx_desc *rxd;
 983         size_t hdr_len;
 984         size_t crypto_len;
 985         bool is_first;
 986         bool is_last;
 987
 988         rxd = (void *)msdu->data - sizeof(*rxd);
 989         is_first = !!(rxd->msdu_end.common.info0 &
 990                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
 991         is_last = !!(rxd->msdu_end.common.info0 &
 992                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
 993
 994         /* Delivered decapped frame:
 995          * [802.11 header]
 996          * [crypto param] <-- can be trimmed if !fcs_err &&
 997          *                    !decrypt_err && !peer_idx_invalid
 998          * [amsdu header] <-- only if A-MSDU
 999          * [rfc1042/llc]
1000          * [payload]
1001          * [FCS] <-- at end, needs to be trimmed
1002          */
1003
1004         /* This probably shouldn't happen but warn just in case */
1005         if (unlikely(WARN_ON_ONCE(!is_first)))
1006                 return;
1007
1008         /* This probably shouldn't happen but warn just in case */
1009         if (unlikely(WARN_ON_ONCE(!(is_first && is_last))))
1010                 return;
1011
1012         skb_trim(msdu, msdu->len - FCS_LEN);
1013
1014         /* In most cases this will be true for sniffed frames. It makes sense
1015          * to deliver them as-is without stripping the crypto param. This is
1016          * necessary for software based decryption.
1017          *
1018          * If there's no error then the frame is decrypted. At least that is
1019          * the case for frames that come in via fragmented rx indication.
1020          */
1021         if (!is_decrypted)
1022                 return;
1023
1024         /* The payload is decrypted so strip crypto params. Start from tail
1025          * since hdr is used to compute some stuff.
1026          */
1027
1028         hdr = (void *)msdu->data;
1029
1030         /* Tail */
1031         if (status->flag & RX_FLAG_IV_STRIPPED)
1032                 skb_trim(msdu, msdu->len -
1033                          ath10k_htt_rx_crypto_tail_len(ar, enctype));
1034
1035         /* MMIC */
1036         if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1037             !ieee80211_has_morefrags(hdr->frame_control) &&
1038             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1039                 skb_trim(msdu, msdu->len - 8);
1040
1041         /* Head */
1042         if (status->flag & RX_FLAG_IV_STRIPPED) {
1043                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1044                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1045
1046                 memmove((void *)msdu->data + crypto_len,
1047                         (void *)msdu->data, hdr_len);
1048                 skb_pull(msdu, crypto_len);
1049         }
1050 }
1051
1052 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1053                                           struct sk_buff *msdu,
1054                                           struct ieee80211_rx_status *status,
1055                                           const u8 first_hdr[64])
1056 {
1057         struct ieee80211_hdr *hdr;
1058         size_t hdr_len;
1059         u8 da[ETH_ALEN];
1060         u8 sa[ETH_ALEN];
1061
1062         /* Delivered decapped frame:
1063          * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1064          * [rfc1042/llc]
1065          *
1066          * Note: The nwifi header doesn't have QoS Control and is
1067          * (always?) a 3addr frame.
1068          *
1069          * Note2: There's no A-MSDU subframe header. Even if it's part
1070          * of an A-MSDU.
1071          */
1072
1073         /* pull decapped header and copy SA & DA */
1074         if ((ar->hw_params.hw_4addr_pad == ATH10K_HW_4ADDR_PAD_BEFORE) &&
1075             ieee80211_has_a4(((struct ieee80211_hdr *)first_hdr)->frame_control)) {
1076                 /* The QCA99X0 4 address mode pad 2 bytes at the
1077                  * beginning of MSDU
1078                  */
1079                 hdr = (struct ieee80211_hdr *)(msdu->data + 2);
1080                 /* The skb length need be extended 2 as the 2 bytes at the tail
1081                  * be excluded due to the padding
1082                  */
1083                 skb_put(msdu, 2);
1084         } else {
1085                 hdr = (struct ieee80211_hdr *)(msdu->data);
1086         }
1087
1088         hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1089         ether_addr_copy(da, ieee80211_get_DA(hdr));
1090         ether_addr_copy(sa, ieee80211_get_SA(hdr));
1091         skb_pull(msdu, hdr_len);
1092
1093         /* push original 802.11 header */
1094         hdr = (struct ieee80211_hdr *)first_hdr;
1095         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1096         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1097
1098         /* original 802.11 header has a different DA and in
1099          * case of 4addr it may also have different SA
1100          */
1101         hdr = (struct ieee80211_hdr *)msdu->data;
1102         ether_addr_copy(ieee80211_get_DA(hdr), da);
1103         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1104 }
1105
1106 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1107                                           struct sk_buff *msdu,
1108                                           enum htt_rx_mpdu_encrypt_type enctype)
1109 {
1110         struct ieee80211_hdr *hdr;
1111         struct htt_rx_desc *rxd;
1112         size_t hdr_len, crypto_len;
1113         void *rfc1042;
1114         bool is_first, is_last, is_amsdu;
1115
1116         rxd = (void *)msdu->data - sizeof(*rxd);
1117         hdr = (void *)rxd->rx_hdr_status;
1118
1119         is_first = !!(rxd->msdu_end.common.info0 &
1120                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1121         is_last = !!(rxd->msdu_end.common.info0 &
1122                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1123         is_amsdu = !(is_first && is_last);
1124
1125         rfc1042 = hdr;
1126
1127         if (is_first) {
1128                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1129                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1130
1131                 rfc1042 += round_up(hdr_len, 4) +
1132                            round_up(crypto_len, 4);
1133         }
1134
1135         if (is_amsdu)
1136                 rfc1042 += sizeof(struct amsdu_subframe_hdr);
1137
1138         return rfc1042;
1139 }
1140
1141 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1142                                         struct sk_buff *msdu,
1143                                         struct ieee80211_rx_status *status,
1144                                         const u8 first_hdr[64],
1145                                         enum htt_rx_mpdu_encrypt_type enctype)
1146 {
1147         struct ieee80211_hdr *hdr;
1148         struct ethhdr *eth;
1149         size_t hdr_len;
1150         void *rfc1042;
1151         u8 da[ETH_ALEN];
1152         u8 sa[ETH_ALEN];
1153
1154         /* Delivered decapped frame:
1155          * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1156          * [payload]
1157          */
1158
1159         rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1160         if (WARN_ON_ONCE(!rfc1042))
1161                 return;
1162
1163         /* pull decapped header and copy SA & DA */
1164         eth = (struct ethhdr *)msdu->data;
1165         ether_addr_copy(da, eth->h_dest);
1166         ether_addr_copy(sa, eth->h_source);
1167         skb_pull(msdu, sizeof(struct ethhdr));
1168
1169         /* push rfc1042/llc/snap */
1170         memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1171                sizeof(struct rfc1042_hdr));
1172
1173         /* push original 802.11 header */
1174         hdr = (struct ieee80211_hdr *)first_hdr;
1175         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1176         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1177
1178         /* original 802.11 header has a different DA and in
1179          * case of 4addr it may also have different SA
1180          */
1181         hdr = (struct ieee80211_hdr *)msdu->data;
1182         ether_addr_copy(ieee80211_get_DA(hdr), da);
1183         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1184 }
1185
1186 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1187                                          struct sk_buff *msdu,
1188                                          struct ieee80211_rx_status *status,
1189                                          const u8 first_hdr[64])
1190 {
1191         struct ieee80211_hdr *hdr;
1192         size_t hdr_len;
1193
1194         /* Delivered decapped frame:
1195          * [amsdu header] <-- replaced with 802.11 hdr
1196          * [rfc1042/llc]
1197          * [payload]
1198          */
1199
1200         skb_pull(msdu, sizeof(struct amsdu_subframe_hdr));
1201
1202         hdr = (struct ieee80211_hdr *)first_hdr;
1203         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1204         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1205 }
1206
1207 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1208                                     struct sk_buff *msdu,
1209                                     struct ieee80211_rx_status *status,
1210                                     u8 first_hdr[64],
1211                                     enum htt_rx_mpdu_encrypt_type enctype,
1212                                     bool is_decrypted)
1213 {
1214         struct htt_rx_desc *rxd;
1215         enum rx_msdu_decap_format decap;
1216
1217         /* First msdu's decapped header:
1218          * [802.11 header] <-- padded to 4 bytes long
1219          * [crypto param] <-- padded to 4 bytes long
1220          * [amsdu header] <-- only if A-MSDU
1221          * [rfc1042/llc]
1222          *
1223          * Other (2nd, 3rd, ..) msdu's decapped header:
1224          * [amsdu header] <-- only if A-MSDU
1225          * [rfc1042/llc]
1226          */
1227
1228         rxd = (void *)msdu->data - sizeof(*rxd);
1229         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1230                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1231
1232         switch (decap) {
1233         case RX_MSDU_DECAP_RAW:
1234                 ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1235                                             is_decrypted);
1236                 break;
1237         case RX_MSDU_DECAP_NATIVE_WIFI:
1238                 ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr);
1239                 break;
1240         case RX_MSDU_DECAP_ETHERNET2_DIX:
1241                 ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1242                 break;
1243         case RX_MSDU_DECAP_8023_SNAP_LLC:
1244                 ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr);
1245                 break;
1246         }
1247 }
1248
1249 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1250 {
1251         struct htt_rx_desc *rxd;
1252         u32 flags, info;
1253         bool is_ip4, is_ip6;
1254         bool is_tcp, is_udp;
1255         bool ip_csum_ok, tcpudp_csum_ok;
1256
1257         rxd = (void *)skb->data - sizeof(*rxd);
1258         flags = __le32_to_cpu(rxd->attention.flags);
1259         info = __le32_to_cpu(rxd->msdu_start.common.info1);
1260
1261         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1262         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1263         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1264         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1265         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1266         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1267
1268         if (!is_ip4 && !is_ip6)
1269                 return CHECKSUM_NONE;
1270         if (!is_tcp && !is_udp)
1271                 return CHECKSUM_NONE;
1272         if (!ip_csum_ok)
1273                 return CHECKSUM_NONE;
1274         if (!tcpudp_csum_ok)
1275                 return CHECKSUM_NONE;
1276
1277         return CHECKSUM_UNNECESSARY;
1278 }
1279
1280 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
1281 {
1282         msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
1283 }
1284
1285 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1286                                  struct sk_buff_head *amsdu,
1287                                  struct ieee80211_rx_status *status)
1288 {
1289         struct sk_buff *first;
1290         struct sk_buff *last;
1291         struct sk_buff *msdu;
1292         struct htt_rx_desc *rxd;
1293         struct ieee80211_hdr *hdr;
1294         enum htt_rx_mpdu_encrypt_type enctype;
1295         u8 first_hdr[64];
1296         u8 *qos;
1297         size_t hdr_len;
1298         bool has_fcs_err;
1299         bool has_crypto_err;
1300         bool has_tkip_err;
1301         bool has_peer_idx_invalid;
1302         bool is_decrypted;
1303         bool is_mgmt;
1304         u32 attention;
1305
1306         if (skb_queue_empty(amsdu))
1307                 return;
1308
1309         first = skb_peek(amsdu);
1310         rxd = (void *)first->data - sizeof(*rxd);
1311
1312         is_mgmt = !!(rxd->attention.flags &
1313                      __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1314
1315         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1316                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1317
1318         /* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1319          * decapped header. It'll be used for undecapping of each MSDU.
1320          */
1321         hdr = (void *)rxd->rx_hdr_status;
1322         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1323         memcpy(first_hdr, hdr, hdr_len);
1324
1325         /* Each A-MSDU subframe will use the original header as the base and be
1326          * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1327          */
1328         hdr = (void *)first_hdr;
1329         qos = ieee80211_get_qos_ctl(hdr);
1330         qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1331
1332         /* Some attention flags are valid only in the last MSDU. */
1333         last = skb_peek_tail(amsdu);
1334         rxd = (void *)last->data - sizeof(*rxd);
1335         attention = __le32_to_cpu(rxd->attention.flags);
1336
1337         has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1338         has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1339         has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1340         has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1341
1342         /* Note: If hardware captures an encrypted frame that it can't decrypt,
1343          * e.g. due to fcs error, missing peer or invalid key data it will
1344          * report the frame as raw.
1345          */
1346         is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
1347                         !has_fcs_err &&
1348                         !has_crypto_err &&
1349                         !has_peer_idx_invalid);
1350
1351         /* Clear per-MPDU flags while leaving per-PPDU flags intact. */
1352         status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
1353                           RX_FLAG_MMIC_ERROR |
1354                           RX_FLAG_DECRYPTED |
1355                           RX_FLAG_IV_STRIPPED |
1356                           RX_FLAG_ONLY_MONITOR |
1357                           RX_FLAG_MMIC_STRIPPED);
1358
1359         if (has_fcs_err)
1360                 status->flag |= RX_FLAG_FAILED_FCS_CRC;
1361
1362         if (has_tkip_err)
1363                 status->flag |= RX_FLAG_MMIC_ERROR;
1364
1365         /* Firmware reports all necessary management frames via WMI already.
1366          * They are not reported to monitor interfaces at all so pass the ones
1367          * coming via HTT to monitor interfaces instead. This simplifies
1368          * matters a lot.
1369          */
1370         if (is_mgmt)
1371                 status->flag |= RX_FLAG_ONLY_MONITOR;
1372
1373         if (is_decrypted) {
1374                 status->flag |= RX_FLAG_DECRYPTED;
1375
1376                 if (likely(!is_mgmt))
1377                         status->flag |= RX_FLAG_IV_STRIPPED |
1378                                         RX_FLAG_MMIC_STRIPPED;
1379 }
1380
1381         skb_queue_walk(amsdu, msdu) {
1382                 ath10k_htt_rx_h_csum_offload(msdu);
1383                 ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
1384                                         is_decrypted);
1385
1386                 /* Undecapping involves copying the original 802.11 header back
1387                  * to sk_buff. If frame is protected and hardware has decrypted
1388                  * it then remove the protected bit.
1389                  */
1390                 if (!is_decrypted)
1391                         continue;
1392                 if (is_mgmt)
1393                         continue;
1394
1395                 hdr = (void *)msdu->data;
1396                 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1397         }
1398 }
1399
1400 static void ath10k_htt_rx_h_deliver(struct ath10k *ar,
1401                                     struct sk_buff_head *amsdu,
1402                                     struct ieee80211_rx_status *status)
1403 {
1404         struct sk_buff *msdu;
1405
1406         while ((msdu = __skb_dequeue(amsdu))) {
1407                 /* Setup per-MSDU flags */
1408                 if (skb_queue_empty(amsdu))
1409                         status->flag &= ~RX_FLAG_AMSDU_MORE;
1410                 else
1411                         status->flag |= RX_FLAG_AMSDU_MORE;
1412
1413                 ath10k_process_rx(ar, status, msdu);
1414         }
1415 }
1416
1417 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu)
1418 {
1419         struct sk_buff *skb, *first;
1420         int space;
1421         int total_len = 0;
1422
1423         /* TODO:  Might could optimize this by using
1424          * skb_try_coalesce or similar method to
1425          * decrease copying, or maybe get mac80211 to
1426          * provide a way to just receive a list of
1427          * skb?
1428          */
1429
1430         first = __skb_dequeue(amsdu);
1431
1432         /* Allocate total length all at once. */
1433         skb_queue_walk(amsdu, skb)
1434                 total_len += skb->len;
1435
1436         space = total_len - skb_tailroom(first);
1437         if ((space > 0) &&
1438             (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
1439                 /* TODO:  bump some rx-oom error stat */
1440                 /* put it back together so we can free the
1441                  * whole list at once.
1442                  */
1443                 __skb_queue_head(amsdu, first);
1444                 return -1;
1445         }
1446
1447         /* Walk list again, copying contents into
1448          * msdu_head
1449          */
1450         while ((skb = __skb_dequeue(amsdu))) {
1451                 skb_copy_from_linear_data(skb, skb_put(first, skb->len),
1452                                           skb->len);
1453                 dev_kfree_skb_any(skb);
1454         }
1455
1456         __skb_queue_head(amsdu, first);
1457         return 0;
1458 }
1459
1460 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
1461                                     struct sk_buff_head *amsdu,
1462                                     bool chained)
1463 {
1464         struct sk_buff *first;
1465         struct htt_rx_desc *rxd;
1466         enum rx_msdu_decap_format decap;
1467
1468         first = skb_peek(amsdu);
1469         rxd = (void *)first->data - sizeof(*rxd);
1470         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1471                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1472
1473         if (!chained)
1474                 return;
1475
1476         /* FIXME: Current unchaining logic can only handle simple case of raw
1477          * msdu chaining. If decapping is other than raw the chaining may be
1478          * more complex and this isn't handled by the current code. Don't even
1479          * try re-constructing such frames - it'll be pretty much garbage.
1480          */
1481         if (decap != RX_MSDU_DECAP_RAW ||
1482             skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
1483                 __skb_queue_purge(amsdu);
1484                 return;
1485         }
1486
1487         ath10k_unchain_msdu(amsdu);
1488 }
1489
1490 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
1491                                         struct sk_buff_head *amsdu,
1492                                         struct ieee80211_rx_status *rx_status)
1493 {
1494         /* FIXME: It might be a good idea to do some fuzzy-testing to drop
1495          * invalid/dangerous frames.
1496          */
1497
1498         if (!rx_status->freq) {
1499                 ath10k_warn(ar, "no channel configured; ignoring frame(s)!\n");
1500                 return false;
1501         }
1502
1503         if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
1504                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1505                 return false;
1506         }
1507
1508         return true;
1509 }
1510
1511 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
1512                                    struct sk_buff_head *amsdu,
1513                                    struct ieee80211_rx_status *rx_status)
1514 {
1515         if (skb_queue_empty(amsdu))
1516                 return;
1517
1518         if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
1519                 return;
1520
1521         __skb_queue_purge(amsdu);
1522 }
1523
1524 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
1525 {
1526         struct ath10k *ar = htt->ar;
1527         static struct ieee80211_rx_status rx_status;
1528         struct sk_buff_head amsdu;
1529         int ret;
1530
1531         __skb_queue_head_init(&amsdu);
1532
1533         spin_lock_bh(&htt->rx_ring.lock);
1534         if (htt->rx_confused) {
1535                 spin_unlock_bh(&htt->rx_ring.lock);
1536                 return -EIO;
1537         }
1538         ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
1539         spin_unlock_bh(&htt->rx_ring.lock);
1540
1541         if (ret < 0) {
1542                 ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
1543                 __skb_queue_purge(&amsdu);
1544                 /* FIXME: It's probably a good idea to reboot the
1545                  * device instead of leaving it inoperable.
1546                  */
1547                 htt->rx_confused = true;
1548                 return ret;
1549         }
1550
1551         ath10k_htt_rx_h_ppdu(ar, &amsdu, &rx_status, 0xffff);
1552         ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0);
1553         ath10k_htt_rx_h_filter(ar, &amsdu, &rx_status);
1554         ath10k_htt_rx_h_mpdu(ar, &amsdu, &rx_status);
1555         ath10k_htt_rx_h_deliver(ar, &amsdu, &rx_status);
1556
1557         return 0;
1558 }
1559
1560 static void ath10k_htt_rx_proc_rx_ind(struct ath10k_htt *htt,
1561                                       struct htt_rx_indication *rx)
1562 {
1563         struct ath10k *ar = htt->ar;
1564         struct htt_rx_indication_mpdu_range *mpdu_ranges;
1565         int num_mpdu_ranges;
1566         int i, mpdu_count = 0;
1567
1568         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1569                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1570         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1571
1572         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1573                         rx, sizeof(*rx) +
1574                         (sizeof(struct htt_rx_indication_mpdu_range) *
1575                                 num_mpdu_ranges));
1576
1577         for (i = 0; i < num_mpdu_ranges; i++)
1578                 mpdu_count += mpdu_ranges[i].mpdu_count;
1579
1580         atomic_add(mpdu_count, &htt->num_mpdus_ready);
1581
1582         tasklet_schedule(&htt->txrx_compl_task);
1583 }
1584
1585 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt)
1586 {
1587         atomic_inc(&htt->num_mpdus_ready);
1588
1589         tasklet_schedule(&htt->txrx_compl_task);
1590 }
1591
1592 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
1593                                        struct sk_buff *skb)
1594 {
1595         struct ath10k_htt *htt = &ar->htt;
1596         struct htt_resp *resp = (struct htt_resp *)skb->data;
1597         struct htt_tx_done tx_done = {};
1598         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1599         __le16 msdu_id;
1600         int i;
1601
1602         switch (status) {
1603         case HTT_DATA_TX_STATUS_NO_ACK:
1604                 tx_done.status = HTT_TX_COMPL_STATE_NOACK;
1605                 break;
1606         case HTT_DATA_TX_STATUS_OK:
1607                 tx_done.status = HTT_TX_COMPL_STATE_ACK;
1608                 break;
1609         case HTT_DATA_TX_STATUS_DISCARD:
1610         case HTT_DATA_TX_STATUS_POSTPONE:
1611         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1612                 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
1613                 break;
1614         default:
1615                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1616                 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
1617                 break;
1618         }
1619
1620         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1621                    resp->data_tx_completion.num_msdus);
1622
1623         for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1624                 msdu_id = resp->data_tx_completion.msdus[i];
1625                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1626
1627                 /* kfifo_put: In practice firmware shouldn't fire off per-CE
1628                  * interrupt and main interrupt (MSI/-X range case) for the same
1629                  * HTC service so it should be safe to use kfifo_put w/o lock.
1630                  *
1631                  * From kfifo_put() documentation:
1632                  *  Note that with only one concurrent reader and one concurrent
1633                  *  writer, you don't need extra locking to use these macro.
1634                  */
1635                 if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
1636                         ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
1637                                     tx_done.msdu_id, tx_done.status);
1638                         ath10k_txrx_tx_unref(htt, &tx_done);
1639                 }
1640         }
1641 }
1642
1643 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1644 {
1645         struct htt_rx_addba *ev = &resp->rx_addba;
1646         struct ath10k_peer *peer;
1647         struct ath10k_vif *arvif;
1648         u16 info0, tid, peer_id;
1649
1650         info0 = __le16_to_cpu(ev->info0);
1651         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1652         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1653
1654         ath10k_dbg(ar, ATH10K_DBG_HTT,
1655                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
1656                    tid, peer_id, ev->window_size);
1657
1658         spin_lock_bh(&ar->data_lock);
1659         peer = ath10k_peer_find_by_id(ar, peer_id);
1660         if (!peer) {
1661                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1662                             peer_id);
1663                 spin_unlock_bh(&ar->data_lock);
1664                 return;
1665         }
1666
1667         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1668         if (!arvif) {
1669                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1670                             peer->vdev_id);
1671                 spin_unlock_bh(&ar->data_lock);
1672                 return;
1673         }
1674
1675         ath10k_dbg(ar, ATH10K_DBG_HTT,
1676                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1677                    peer->addr, tid, ev->window_size);
1678
1679         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1680         spin_unlock_bh(&ar->data_lock);
1681 }
1682
1683 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1684 {
1685         struct htt_rx_delba *ev = &resp->rx_delba;
1686         struct ath10k_peer *peer;
1687         struct ath10k_vif *arvif;
1688         u16 info0, tid, peer_id;
1689
1690         info0 = __le16_to_cpu(ev->info0);
1691         tid = MS(info0, HTT_RX_BA_INFO0_TID);
1692         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1693
1694         ath10k_dbg(ar, ATH10K_DBG_HTT,
1695                    "htt rx delba tid %hu peer_id %hu\n",
1696                    tid, peer_id);
1697
1698         spin_lock_bh(&ar->data_lock);
1699         peer = ath10k_peer_find_by_id(ar, peer_id);
1700         if (!peer) {
1701                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1702                             peer_id);
1703                 spin_unlock_bh(&ar->data_lock);
1704                 return;
1705         }
1706
1707         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1708         if (!arvif) {
1709                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1710                             peer->vdev_id);
1711                 spin_unlock_bh(&ar->data_lock);
1712                 return;
1713         }
1714
1715         ath10k_dbg(ar, ATH10K_DBG_HTT,
1716                    "htt rx stop rx ba session sta %pM tid %hu\n",
1717                    peer->addr, tid);
1718
1719         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1720         spin_unlock_bh(&ar->data_lock);
1721 }
1722
1723 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
1724                                        struct sk_buff_head *amsdu)
1725 {
1726         struct sk_buff *msdu;
1727         struct htt_rx_desc *rxd;
1728
1729         if (skb_queue_empty(list))
1730                 return -ENOBUFS;
1731
1732         if (WARN_ON(!skb_queue_empty(amsdu)))
1733                 return -EINVAL;
1734
1735         while ((msdu = __skb_dequeue(list))) {
1736                 __skb_queue_tail(amsdu, msdu);
1737
1738                 rxd = (void *)msdu->data - sizeof(*rxd);
1739                 if (rxd->msdu_end.common.info0 &
1740                     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
1741                         break;
1742         }
1743
1744         msdu = skb_peek_tail(amsdu);
1745         rxd = (void *)msdu->data - sizeof(*rxd);
1746         if (!(rxd->msdu_end.common.info0 &
1747               __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
1748                 skb_queue_splice_init(amsdu, list);
1749                 return -EAGAIN;
1750         }
1751
1752         return 0;
1753 }
1754
1755 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
1756                                             struct sk_buff *skb)
1757 {
1758         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1759
1760         if (!ieee80211_has_protected(hdr->frame_control))
1761                 return;
1762
1763         /* Offloaded frames are already decrypted but firmware insists they are
1764          * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
1765          * will drop the frame.
1766          */
1767
1768         hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1769         status->flag |= RX_FLAG_DECRYPTED |
1770                         RX_FLAG_IV_STRIPPED |
1771                         RX_FLAG_MMIC_STRIPPED;
1772 }
1773
1774 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
1775                                        struct sk_buff_head *list)
1776 {
1777         struct ath10k_htt *htt = &ar->htt;
1778         struct ieee80211_rx_status *status = &htt->rx_status;
1779         struct htt_rx_offload_msdu *rx;
1780         struct sk_buff *msdu;
1781         size_t offset;
1782
1783         while ((msdu = __skb_dequeue(list))) {
1784                 /* Offloaded frames don't have Rx descriptor. Instead they have
1785                  * a short meta information header.
1786                  */
1787
1788                 rx = (void *)msdu->data;
1789
1790                 skb_put(msdu, sizeof(*rx));
1791                 skb_pull(msdu, sizeof(*rx));
1792
1793                 if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
1794                         ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
1795                         dev_kfree_skb_any(msdu);
1796                         continue;
1797                 }
1798
1799                 skb_put(msdu, __le16_to_cpu(rx->msdu_len));
1800
1801                 /* Offloaded rx header length isn't multiple of 2 nor 4 so the
1802                  * actual payload is unaligned. Align the frame.  Otherwise
1803                  * mac80211 complains.  This shouldn't reduce performance much
1804                  * because these offloaded frames are rare.
1805                  */
1806                 offset = 4 - ((unsigned long)msdu->data & 3);
1807                 skb_put(msdu, offset);
1808                 memmove(msdu->data + offset, msdu->data, msdu->len);
1809                 skb_pull(msdu, offset);
1810
1811                 /* FIXME: The frame is NWifi. Re-construct QoS Control
1812                  * if possible later.
1813                  */
1814
1815                 memset(status, 0, sizeof(*status));
1816                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1817
1818                 ath10k_htt_rx_h_rx_offload_prot(status, msdu);
1819                 ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
1820                 ath10k_process_rx(ar, status, msdu);
1821         }
1822 }
1823
1824 static void ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
1825 {
1826         struct ath10k_htt *htt = &ar->htt;
1827         struct htt_resp *resp = (void *)skb->data;
1828         struct ieee80211_rx_status *status = &htt->rx_status;
1829         struct sk_buff_head list;
1830         struct sk_buff_head amsdu;
1831         u16 peer_id;
1832         u16 msdu_count;
1833         u8 vdev_id;
1834         u8 tid;
1835         bool offload;
1836         bool frag;
1837         int ret;
1838
1839         lockdep_assert_held(&htt->rx_ring.lock);
1840
1841         if (htt->rx_confused)
1842                 return;
1843
1844         skb_pull(skb, sizeof(resp->hdr));
1845         skb_pull(skb, sizeof(resp->rx_in_ord_ind));
1846
1847         peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
1848         msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
1849         vdev_id = resp->rx_in_ord_ind.vdev_id;
1850         tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
1851         offload = !!(resp->rx_in_ord_ind.info &
1852                         HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
1853         frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
1854
1855         ath10k_dbg(ar, ATH10K_DBG_HTT,
1856                    "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
1857                    vdev_id, peer_id, tid, offload, frag, msdu_count);
1858
1859         if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs)) {
1860                 ath10k_warn(ar, "dropping invalid in order rx indication\n");
1861                 return;
1862         }
1863
1864         /* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
1865          * extracted and processed.
1866          */
1867         __skb_queue_head_init(&list);
1868         ret = ath10k_htt_rx_pop_paddr_list(htt, &resp->rx_in_ord_ind, &list);
1869         if (ret < 0) {
1870                 ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
1871                 htt->rx_confused = true;
1872                 return;
1873         }
1874
1875         /* Offloaded frames are very different and need to be handled
1876          * separately.
1877          */
1878         if (offload)
1879                 ath10k_htt_rx_h_rx_offload(ar, &list);
1880
1881         while (!skb_queue_empty(&list)) {
1882                 __skb_queue_head_init(&amsdu);
1883                 ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
1884                 switch (ret) {
1885                 case 0:
1886                         /* Note: The in-order indication may report interleaved
1887                          * frames from different PPDUs meaning reported rx rate
1888                          * to mac80211 isn't accurate/reliable. It's still
1889                          * better to report something than nothing though. This
1890                          * should still give an idea about rx rate to the user.
1891                          */
1892                         ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
1893                         ath10k_htt_rx_h_filter(ar, &amsdu, status);
1894                         ath10k_htt_rx_h_mpdu(ar, &amsdu, status);
1895                         ath10k_htt_rx_h_deliver(ar, &amsdu, status);
1896                         break;
1897                 case -EAGAIN:
1898                         /* fall through */
1899                 default:
1900                         /* Should not happen. */
1901                         ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
1902                         htt->rx_confused = true;
1903                         __skb_queue_purge(&list);
1904                         return;
1905                 }
1906         }
1907 }
1908
1909 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
1910                                                    const __le32 *resp_ids,
1911                                                    int num_resp_ids)
1912 {
1913         int i;
1914         u32 resp_id;
1915
1916         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
1917                    num_resp_ids);
1918
1919         for (i = 0; i < num_resp_ids; i++) {
1920                 resp_id = le32_to_cpu(resp_ids[i]);
1921
1922                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
1923                            resp_id);
1924
1925                 /* TODO: free resp_id */
1926         }
1927 }
1928
1929 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
1930 {
1931         struct ieee80211_hw *hw = ar->hw;
1932         struct ieee80211_txq *txq;
1933         struct htt_resp *resp = (struct htt_resp *)skb->data;
1934         struct htt_tx_fetch_record *record;
1935         size_t len;
1936         size_t max_num_bytes;
1937         size_t max_num_msdus;
1938         size_t num_bytes;
1939         size_t num_msdus;
1940         const __le32 *resp_ids;
1941         u16 num_records;
1942         u16 num_resp_ids;
1943         u16 peer_id;
1944         u8 tid;
1945         int ret;
1946         int i;
1947
1948         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
1949
1950         len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
1951         if (unlikely(skb->len < len)) {
1952                 ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
1953                 return;
1954         }
1955
1956         num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
1957         num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
1958
1959         len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
1960         len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
1961
1962         if (unlikely(skb->len < len)) {
1963                 ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
1964                 return;
1965         }
1966
1967         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %hu num resps %hu seq %hu\n",
1968                    num_records, num_resp_ids,
1969                    le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
1970
1971         if (!ar->htt.tx_q_state.enabled) {
1972                 ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
1973                 return;
1974         }
1975
1976         if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
1977                 ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
1978                 return;
1979         }
1980
1981         rcu_read_lock();
1982
1983         for (i = 0; i < num_records; i++) {
1984                 record = &resp->tx_fetch_ind.records[i];
1985                 peer_id = MS(le16_to_cpu(record->info),
1986                              HTT_TX_FETCH_RECORD_INFO_PEER_ID);
1987                 tid = MS(le16_to_cpu(record->info),
1988                          HTT_TX_FETCH_RECORD_INFO_TID);
1989                 max_num_msdus = le16_to_cpu(record->num_msdus);
1990                 max_num_bytes = le32_to_cpu(record->num_bytes);
1991
1992                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %hu tid %hhu msdus %zu bytes %zu\n",
1993                            i, peer_id, tid, max_num_msdus, max_num_bytes);
1994
1995                 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
1996                     unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
1997                         ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
1998                                     peer_id, tid);
1999                         continue;
2000                 }
2001
2002                 spin_lock_bh(&ar->data_lock);
2003                 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
2004                 spin_unlock_bh(&ar->data_lock);
2005
2006                 /* It is okay to release the lock and use txq because RCU read
2007                  * lock is held.
2008                  */
2009
2010                 if (unlikely(!txq)) {
2011                         ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
2012                                     peer_id, tid);
2013                         continue;
2014                 }
2015
2016                 num_msdus = 0;
2017                 num_bytes = 0;
2018
2019                 while (num_msdus < max_num_msdus &&
2020                        num_bytes < max_num_bytes) {
2021                         ret = ath10k_mac_tx_push_txq(hw, txq);
2022                         if (ret < 0)
2023                                 break;
2024
2025                         num_msdus++;
2026                         num_bytes += ret;
2027                 }
2028
2029                 record->num_msdus = cpu_to_le16(num_msdus);
2030                 record->num_bytes = cpu_to_le32(num_bytes);
2031
2032                 ath10k_htt_tx_txq_recalc(hw, txq);
2033         }
2034
2035         rcu_read_unlock();
2036
2037         resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
2038         ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
2039
2040         ret = ath10k_htt_tx_fetch_resp(ar,
2041                                        resp->tx_fetch_ind.token,
2042                                        resp->tx_fetch_ind.fetch_seq_num,
2043                                        resp->tx_fetch_ind.records,
2044                                        num_records);
2045         if (unlikely(ret)) {
2046                 ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
2047                             le32_to_cpu(resp->tx_fetch_ind.token), ret);
2048                 /* FIXME: request fw restart */
2049         }
2050
2051         ath10k_htt_tx_txq_sync(ar);
2052 }
2053
2054 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
2055                                            struct sk_buff *skb)
2056 {
2057         const struct htt_resp *resp = (void *)skb->data;
2058         size_t len;
2059         int num_resp_ids;
2060
2061         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
2062
2063         len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
2064         if (unlikely(skb->len < len)) {
2065                 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
2066                 return;
2067         }
2068
2069         num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
2070         len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
2071
2072         if (unlikely(skb->len < len)) {
2073                 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
2074                 return;
2075         }
2076
2077         ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
2078                                                resp->tx_fetch_confirm.resp_ids,
2079                                                num_resp_ids);
2080 }
2081
2082 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
2083                                              struct sk_buff *skb)
2084 {
2085         const struct htt_resp *resp = (void *)skb->data;
2086         const struct htt_tx_mode_switch_record *record;
2087         struct ieee80211_txq *txq;
2088         struct ath10k_txq *artxq;
2089         size_t len;
2090         size_t num_records;
2091         enum htt_tx_mode_switch_mode mode;
2092         bool enable;
2093         u16 info0;
2094         u16 info1;
2095         u16 threshold;
2096         u16 peer_id;
2097         u8 tid;
2098         int i;
2099
2100         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
2101
2102         len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
2103         if (unlikely(skb->len < len)) {
2104                 ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
2105                 return;
2106         }
2107
2108         info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
2109         info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
2110
2111         enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
2112         num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
2113         mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
2114         threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
2115
2116         ath10k_dbg(ar, ATH10K_DBG_HTT,
2117                    "htt rx tx mode switch ind info0 0x%04hx info1 0x%04hx enable %d num records %zd mode %d threshold %hu\n",
2118                    info0, info1, enable, num_records, mode, threshold);
2119
2120         len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
2121
2122         if (unlikely(skb->len < len)) {
2123                 ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
2124                 return;
2125         }
2126
2127         switch (mode) {
2128         case HTT_TX_MODE_SWITCH_PUSH:
2129         case HTT_TX_MODE_SWITCH_PUSH_PULL:
2130                 break;
2131         default:
2132                 ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
2133                             mode);
2134                 return;
2135         }
2136
2137         if (!enable)
2138                 return;
2139
2140         ar->htt.tx_q_state.enabled = enable;
2141         ar->htt.tx_q_state.mode = mode;
2142         ar->htt.tx_q_state.num_push_allowed = threshold;
2143
2144         rcu_read_lock();
2145
2146         for (i = 0; i < num_records; i++) {
2147                 record = &resp->tx_mode_switch_ind.records[i];
2148                 info0 = le16_to_cpu(record->info0);
2149                 peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
2150                 tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
2151
2152                 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
2153                     unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
2154                         ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
2155                                     peer_id, tid);
2156                         continue;
2157                 }
2158
2159                 spin_lock_bh(&ar->data_lock);
2160                 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
2161                 spin_unlock_bh(&ar->data_lock);
2162
2163                 /* It is okay to release the lock and use txq because RCU read
2164                  * lock is held.
2165                  */
2166
2167                 if (unlikely(!txq)) {
2168                         ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
2169                                     peer_id, tid);
2170                         continue;
2171                 }
2172
2173                 spin_lock_bh(&ar->htt.tx_lock);
2174                 artxq = (void *)txq->drv_priv;
2175                 artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
2176                 spin_unlock_bh(&ar->htt.tx_lock);
2177         }
2178
2179         rcu_read_unlock();
2180
2181         ath10k_mac_tx_push_pending(ar);
2182 }
2183
2184 static inline enum nl80211_band phy_mode_to_band(u32 phy_mode)
2185 {
2186         enum nl80211_band band;
2187
2188         switch (phy_mode) {
2189         case MODE_11A:
2190         case MODE_11NA_HT20:
2191         case MODE_11NA_HT40:
2192         case MODE_11AC_VHT20:
2193         case MODE_11AC_VHT40:
2194         case MODE_11AC_VHT80:
2195                 band = NL80211_BAND_5GHZ;
2196                 break;
2197         case MODE_11G:
2198         case MODE_11B:
2199         case MODE_11GONLY:
2200         case MODE_11NG_HT20:
2201         case MODE_11NG_HT40:
2202         case MODE_11AC_VHT20_2G:
2203         case MODE_11AC_VHT40_2G:
2204         case MODE_11AC_VHT80_2G:
2205         default:
2206                 band = NL80211_BAND_2GHZ;
2207         }
2208
2209         return band;
2210 }
2211
2212 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
2213 {
2214         bool release;
2215
2216         release = ath10k_htt_t2h_msg_handler(ar, skb);
2217
2218         /* Free the indication buffer */
2219         if (release)
2220                 dev_kfree_skb_any(skb);
2221 }
2222
2223 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
2224 {
2225         struct ath10k_htt *htt = &ar->htt;
2226         struct htt_resp *resp = (struct htt_resp *)skb->data;
2227         enum htt_t2h_msg_type type;
2228
2229         /* confirm alignment */
2230         if (!IS_ALIGNED((unsigned long)skb->data, 4))
2231                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
2232
2233         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
2234                    resp->hdr.msg_type);
2235
2236         if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
2237                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
2238                            resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
2239                 return true;
2240         }
2241         type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
2242
2243         switch (type) {
2244         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
2245                 htt->target_version_major = resp->ver_resp.major;
2246                 htt->target_version_minor = resp->ver_resp.minor;
2247                 complete(&htt->target_version_received);
2248                 break;
2249         }
2250         case HTT_T2H_MSG_TYPE_RX_IND:
2251                 ath10k_htt_rx_proc_rx_ind(htt, &resp->rx_ind);
2252                 break;
2253         case HTT_T2H_MSG_TYPE_PEER_MAP: {
2254                 struct htt_peer_map_event ev = {
2255                         .vdev_id = resp->peer_map.vdev_id,
2256                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
2257                 };
2258                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
2259                 ath10k_peer_map_event(htt, &ev);
2260                 break;
2261         }
2262         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
2263                 struct htt_peer_unmap_event ev = {
2264                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
2265                 };
2266                 ath10k_peer_unmap_event(htt, &ev);
2267                 break;
2268         }
2269         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
2270                 struct htt_tx_done tx_done = {};
2271                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
2272
2273                 tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
2274
2275                 switch (status) {
2276                 case HTT_MGMT_TX_STATUS_OK:
2277                         tx_done.status = HTT_TX_COMPL_STATE_ACK;
2278                         break;
2279                 case HTT_MGMT_TX_STATUS_RETRY:
2280                         tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2281                         break;
2282                 case HTT_MGMT_TX_STATUS_DROP:
2283                         tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2284                         break;
2285                 }
2286
2287                 status = ath10k_txrx_tx_unref(htt, &tx_done);
2288                 if (!status) {
2289                         spin_lock_bh(&htt->tx_lock);
2290                         ath10k_htt_tx_mgmt_dec_pending(htt);
2291                         spin_unlock_bh(&htt->tx_lock);
2292                 }
2293                 ath10k_mac_tx_push_pending(ar);
2294                 break;
2295         }
2296         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
2297                 ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
2298                 tasklet_schedule(&htt->txrx_compl_task);
2299                 break;
2300         case HTT_T2H_MSG_TYPE_SEC_IND: {
2301                 struct ath10k *ar = htt->ar;
2302                 struct htt_security_indication *ev = &resp->security_indication;
2303
2304                 ath10k_dbg(ar, ATH10K_DBG_HTT,
2305                            "sec ind peer_id %d unicast %d type %d\n",
2306                           __le16_to_cpu(ev->peer_id),
2307                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
2308                           MS(ev->flags, HTT_SECURITY_TYPE));
2309                 complete(&ar->install_key_done);
2310                 break;
2311         }
2312         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
2313                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2314                                 skb->data, skb->len);
2315                 ath10k_htt_rx_frag_handler(htt);
2316                 break;
2317         }
2318         case HTT_T2H_MSG_TYPE_TEST:
2319                 break;
2320         case HTT_T2H_MSG_TYPE_STATS_CONF:
2321                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
2322                 break;
2323         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
2324                 /* Firmware can return tx frames if it's unable to fully
2325                  * process them and suspects host may be able to fix it. ath10k
2326                  * sends all tx frames as already inspected so this shouldn't
2327                  * happen unless fw has a bug.
2328                  */
2329                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
2330                 break;
2331         case HTT_T2H_MSG_TYPE_RX_ADDBA:
2332                 ath10k_htt_rx_addba(ar, resp);
2333                 break;
2334         case HTT_T2H_MSG_TYPE_RX_DELBA:
2335                 ath10k_htt_rx_delba(ar, resp);
2336                 break;
2337         case HTT_T2H_MSG_TYPE_PKTLOG: {
2338                 struct ath10k_pktlog_hdr *hdr =
2339                         (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;
2340
2341                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
2342                                         sizeof(*hdr) +
2343                                         __le16_to_cpu(hdr->size));
2344                 break;
2345         }
2346         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
2347                 /* Ignore this event because mac80211 takes care of Rx
2348                  * aggregation reordering.
2349                  */
2350                 break;
2351         }
2352         case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
2353                 skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
2354                 tasklet_schedule(&htt->txrx_compl_task);
2355                 return false;
2356         }
2357         case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
2358                 break;
2359         case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
2360                 u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
2361                 u32 freq = __le32_to_cpu(resp->chan_change.freq);
2362
2363                 ar->tgt_oper_chan =
2364                         __ieee80211_get_channel(ar->hw->wiphy, freq);
2365                 ath10k_dbg(ar, ATH10K_DBG_HTT,
2366                            "htt chan change freq %u phymode %s\n",
2367                            freq, ath10k_wmi_phymode_str(phymode));
2368                 break;
2369         }
2370         case HTT_T2H_MSG_TYPE_AGGR_CONF:
2371                 break;
2372         case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
2373                 struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
2374
2375                 if (!tx_fetch_ind) {
2376                         ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
2377                         break;
2378                 }
2379                 skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
2380                 tasklet_schedule(&htt->txrx_compl_task);
2381                 break;
2382         }
2383         case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
2384                 ath10k_htt_rx_tx_fetch_confirm(ar, skb);
2385                 break;
2386         case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
2387                 ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
2388                 break;
2389         case HTT_T2H_MSG_TYPE_EN_STATS:
2390         default:
2391                 ath10k_warn(ar, "htt event (%d) not handled\n",
2392                             resp->hdr.msg_type);
2393                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2394                                 skb->data, skb->len);
2395                 break;
2396         };
2397         return true;
2398 }
2399 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
2400
2401 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
2402                                              struct sk_buff *skb)
2403 {
2404         trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
2405         dev_kfree_skb_any(skb);
2406 }
2407 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
2408
2409 static void ath10k_htt_txrx_compl_task(unsigned long ptr)
2410 {
2411         struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
2412         struct ath10k *ar = htt->ar;
2413         struct htt_tx_done tx_done = {};
2414         struct sk_buff_head rx_ind_q;
2415         struct sk_buff_head tx_ind_q;
2416         struct sk_buff *skb;
2417         unsigned long flags;
2418         int num_mpdus;
2419
2420         __skb_queue_head_init(&rx_ind_q);
2421         __skb_queue_head_init(&tx_ind_q);
2422
2423         spin_lock_irqsave(&htt->rx_in_ord_compl_q.lock, flags);
2424         skb_queue_splice_init(&htt->rx_in_ord_compl_q, &rx_ind_q);
2425         spin_unlock_irqrestore(&htt->rx_in_ord_compl_q.lock, flags);
2426
2427         spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
2428         skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
2429         spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
2430
2431         /* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
2432          * From kfifo_get() documentation:
2433          *  Note that with only one concurrent reader and one concurrent writer,
2434          *  you don't need extra locking to use these macro.
2435          */
2436         while (kfifo_get(&htt->txdone_fifo, &tx_done))
2437                 ath10k_txrx_tx_unref(htt, &tx_done);
2438
2439         while ((skb = __skb_dequeue(&tx_ind_q))) {
2440                 ath10k_htt_rx_tx_fetch_ind(ar, skb);
2441                 dev_kfree_skb_any(skb);
2442         }
2443
2444         ath10k_mac_tx_push_pending(ar);
2445
2446         num_mpdus = atomic_read(&htt->num_mpdus_ready);
2447
2448         while (num_mpdus) {
2449                 if (ath10k_htt_rx_handle_amsdu(htt))
2450                         break;
2451
2452                 num_mpdus--;
2453                 atomic_dec(&htt->num_mpdus_ready);
2454         }
2455
2456         while ((skb = __skb_dequeue(&rx_ind_q))) {
2457                 spin_lock_bh(&htt->rx_ring.lock);
2458                 ath10k_htt_rx_in_ord_ind(ar, skb);
2459                 spin_unlock_bh(&htt->rx_ring.lock);
2460                 dev_kfree_skb_any(skb);
2461         }
2462
2463         ath10k_htt_rx_msdu_buff_replenish(htt);
2464 }