drivers/net/wireless/ath/ath10k/htt_rx.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2005-2011 Atheros Communications Inc.
   4  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
   5  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
   6  */
   7
   8 #include "core.h"
   9 #include "htc.h"
  10 #include "htt.h"
  11 #include "txrx.h"
  12 #include "debug.h"
  13 #include "trace.h"
  14 #include "mac.h"
  15
  16 #include <linux/log2.h>
  17 #include <linux/bitfield.h>
  18
  19 /* when under memory pressure rx ring refill may fail and needs a retry */
  20 #define HTT_RX_RING_REFILL_RETRY_MS 50
  21
  22 #define HTT_RX_RING_REFILL_RESCHED_MS 5
  23
  24 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
  25
  26 static struct sk_buff *
  27 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u64 paddr)
  28 {
  29         struct ath10k_skb_rxcb *rxcb;
  30
  31         hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
  32                 if (rxcb->paddr == paddr)
  33                         return ATH10K_RXCB_SKB(rxcb);
  34
  35         WARN_ON_ONCE(1);
  36         return NULL;
  37 }
  38
  39 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
  40 {
  41         struct sk_buff *skb;
  42         struct ath10k_skb_rxcb *rxcb;
  43         struct hlist_node *n;
  44         int i;
  45
  46         if (htt->rx_ring.in_ord_rx) {
  47                 hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
  48                         skb = ATH10K_RXCB_SKB(rxcb);
  49                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  50                                          skb->len + skb_tailroom(skb),
  51                                          DMA_FROM_DEVICE);
  52                         hash_del(&rxcb->hlist);
  53                         dev_kfree_skb_any(skb);
  54                 }
  55         } else {
  56                 for (i = 0; i < htt->rx_ring.size; i++) {
  57                         skb = htt->rx_ring.netbufs_ring[i];
  58                         if (!skb)
  59                                 continue;
  60
  61                         rxcb = ATH10K_SKB_RXCB(skb);
  62                         dma_unmap_single(htt->ar->dev, rxcb->paddr,
  63                                          skb->len + skb_tailroom(skb),
  64                                          DMA_FROM_DEVICE);
  65                         dev_kfree_skb_any(skb);
  66                 }
  67         }
  68
  69         htt->rx_ring.fill_cnt = 0;
  70         hash_init(htt->rx_ring.skb_table);
  71         memset(htt->rx_ring.netbufs_ring, 0,
  72                htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
  73 }
  74
  75 static size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
  76 {
  77         return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
  78 }
  79
  80 static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
  81 {
  82         return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
  83 }
  84
  85 static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
  86                                              void *vaddr)
  87 {
  88         htt->rx_ring.paddrs_ring_32 = vaddr;
  89 }
  90
  91 static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
  92                                              void *vaddr)
  93 {
  94         htt->rx_ring.paddrs_ring_64 = vaddr;
  95 }
  96
  97 static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
  98                                           dma_addr_t paddr, int idx)
  99 {
 100         htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
 101 }
 102
 103 static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
 104                                           dma_addr_t paddr, int idx)
 105 {
 106         htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
 107 }
 108
 109 static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
 110 {
 111         htt->rx_ring.paddrs_ring_32[idx] = 0;
 112 }
 113
 114 static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
 115 {
 116         htt->rx_ring.paddrs_ring_64[idx] = 0;
 117 }
 118
 119 static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
 120 {
 121         return (void *)htt->rx_ring.paddrs_ring_32;
 122 }
 123
 124 static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
 125 {
 126         return (void *)htt->rx_ring.paddrs_ring_64;
 127 }
 128
 129 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 130 {
 131         struct htt_rx_desc *rx_desc;
 132         struct ath10k_skb_rxcb *rxcb;
 133         struct sk_buff *skb;
 134         dma_addr_t paddr;
 135         int ret = 0, idx;
 136
 137         /* The Full Rx Reorder firmware has no way of telling the host
 138          * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
 139          * To keep things simple make sure ring is always half empty. This
 140          * guarantees there'll be no replenishment overruns possible.
 141          */
 142         BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
 143
 144         idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
 145         while (num > 0) {
 146                 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
 147                 if (!skb) {
 148                         ret = -ENOMEM;
 149                         goto fail;
 150                 }
 151
 152                 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
 153                         skb_pull(skb,
 154                                  PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
 155                                  skb->data);
 156
 157                 /* Clear rx_desc attention word before posting to Rx ring */
 158                 rx_desc = (struct htt_rx_desc *)skb->data;
 159                 rx_desc->attention.flags = __cpu_to_le32(0);
 160
 161                 paddr = dma_map_single(htt->ar->dev, skb->data,
 162                                        skb->len + skb_tailroom(skb),
 163                                        DMA_FROM_DEVICE);
 164
 165                 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
 166                         dev_kfree_skb_any(skb);
 167                         ret = -ENOMEM;
 168                         goto fail;
 169                 }
 170
 171                 rxcb = ATH10K_SKB_RXCB(skb);
 172                 rxcb->paddr = paddr;
 173                 htt->rx_ring.netbufs_ring[idx] = skb;
 174                 ath10k_htt_set_paddrs_ring(htt, paddr, idx);
 175                 htt->rx_ring.fill_cnt++;
 176
 177                 if (htt->rx_ring.in_ord_rx) {
 178                         hash_add(htt->rx_ring.skb_table,
 179                                  &ATH10K_SKB_RXCB(skb)->hlist,
 180                                  paddr);
 181                 }
 182
 183                 num--;
 184                 idx++;
 185                 idx &= htt->rx_ring.size_mask;
 186         }
 187
 188 fail:
 189         /*
 190          * Make sure the rx buffer is updated before available buffer
 191          * index to avoid any potential rx ring corruption.
 192          */
 193         mb();
 194         *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
 195         return ret;
 196 }
 197
 198 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 199 {
 200         lockdep_assert_held(&htt->rx_ring.lock);
 201         return __ath10k_htt_rx_ring_fill_n(htt, num);
 202 }
 203
 204 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
 205 {
 206         int ret, num_deficit, num_to_fill;
 207
 208         /* Refilling the whole RX ring buffer proves to be a bad idea. The
 209          * reason is RX may take up significant amount of CPU cycles and starve
 210          * other tasks, e.g. TX on an ethernet device while acting as a bridge
 211          * with ath10k wlan interface. This ended up with very poor performance
 212          * once CPU the host system was overwhelmed with RX on ath10k.
 213          *
 214          * By limiting the number of refills the replenishing occurs
 215          * progressively. This in turns makes use of the fact tasklets are
 216          * processed in FIFO order. This means actual RX processing can starve
 217          * out refilling. If there's not enough buffers on RX ring FW will not
 218          * report RX until it is refilled with enough buffers. This
 219          * automatically balances load wrt to CPU power.
 220          *
 221          * This probably comes at a cost of lower maximum throughput but
 222          * improves the average and stability.
 223          */
 224         spin_lock_bh(&htt->rx_ring.lock);
 225         num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
 226         num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
 227         num_deficit -= num_to_fill;
 228         ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
 229         if (ret == -ENOMEM) {
 230                 /*
 231                  * Failed to fill it to the desired level -
 232                  * we'll start a timer and try again next time.
 233                  * As long as enough buffers are left in the ring for
 234                  * another A-MPDU rx, no special recovery is needed.
 235                  */
 236                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 237                           msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
 238         } else if (num_deficit > 0) {
 239                 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
 240                           msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
 241         }
 242         spin_unlock_bh(&htt->rx_ring.lock);
 243 }
 244
 245 static void ath10k_htt_rx_ring_refill_retry(struct timer_list *t)
 246 {
 247         struct ath10k_htt *htt = from_timer(htt, t, rx_ring.refill_retry_timer);
 248
 249         ath10k_htt_rx_msdu_buff_replenish(htt);
 250 }
 251
 252 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
 253 {
 254         struct ath10k_htt *htt = &ar->htt;
 255         int ret;
 256
 257         if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
 258                 return 0;
 259
 260         spin_lock_bh(&htt->rx_ring.lock);
 261         ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
 262                                               htt->rx_ring.fill_cnt));
 263
 264         if (ret)
 265                 ath10k_htt_rx_ring_free(htt);
 266
 267         spin_unlock_bh(&htt->rx_ring.lock);
 268
 269         return ret;
 270 }
 271
 272 void ath10k_htt_rx_free(struct ath10k_htt *htt)
 273 {
 274         if (htt->ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
 275                 return;
 276
 277         del_timer_sync(&htt->rx_ring.refill_retry_timer);
 278
 279         skb_queue_purge(&htt->rx_msdus_q);
 280         skb_queue_purge(&htt->rx_in_ord_compl_q);
 281         skb_queue_purge(&htt->tx_fetch_ind_q);
 282
 283         spin_lock_bh(&htt->rx_ring.lock);
 284         ath10k_htt_rx_ring_free(htt);
 285         spin_unlock_bh(&htt->rx_ring.lock);
 286
 287         dma_free_coherent(htt->ar->dev,
 288                           ath10k_htt_get_rx_ring_size(htt),
 289                           ath10k_htt_get_vaddr_ring(htt),
 290                           htt->rx_ring.base_paddr);
 291
 292         dma_free_coherent(htt->ar->dev,
 293                           sizeof(*htt->rx_ring.alloc_idx.vaddr),
 294                           htt->rx_ring.alloc_idx.vaddr,
 295                           htt->rx_ring.alloc_idx.paddr);
 296
 297         kfree(htt->rx_ring.netbufs_ring);
 298 }
 299
 300 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 301 {
 302         struct ath10k *ar = htt->ar;
 303         int idx;
 304         struct sk_buff *msdu;
 305
 306         lockdep_assert_held(&htt->rx_ring.lock);
 307
 308         if (htt->rx_ring.fill_cnt == 0) {
 309                 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
 310                 return NULL;
 311         }
 312
 313         idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 314         msdu = htt->rx_ring.netbufs_ring[idx];
 315         htt->rx_ring.netbufs_ring[idx] = NULL;
 316         ath10k_htt_reset_paddrs_ring(htt, idx);
 317
 318         idx++;
 319         idx &= htt->rx_ring.size_mask;
 320         htt->rx_ring.sw_rd_idx.msdu_payld = idx;
 321         htt->rx_ring.fill_cnt--;
 322
 323         dma_unmap_single(htt->ar->dev,
 324                          ATH10K_SKB_RXCB(msdu)->paddr,
 325                          msdu->len + skb_tailroom(msdu),
 326                          DMA_FROM_DEVICE);
 327         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 328                         msdu->data, msdu->len + skb_tailroom(msdu));
 329
 330         return msdu;
 331 }
 332
 333 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
 334 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 335                                    struct sk_buff_head *amsdu)
 336 {
 337         struct ath10k *ar = htt->ar;
 338         int msdu_len, msdu_chaining = 0;
 339         struct sk_buff *msdu;
 340         struct htt_rx_desc *rx_desc;
 341
 342         lockdep_assert_held(&htt->rx_ring.lock);
 343
 344         for (;;) {
 345                 int last_msdu, msdu_len_invalid, msdu_chained;
 346
 347                 msdu = ath10k_htt_rx_netbuf_pop(htt);
 348                 if (!msdu) {
 349                         __skb_queue_purge(amsdu);
 350                         return -ENOENT;
 351                 }
 352
 353                 __skb_queue_tail(amsdu, msdu);
 354
 355                 rx_desc = (struct htt_rx_desc *)msdu->data;
 356
 357                 /* FIXME: we must report msdu payload since this is what caller
 358                  * expects now
 359                  */
 360                 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 361                 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
 362
 363                 /*
 364                  * Sanity check - confirm the HW is finished filling in the
 365                  * rx data.
 366                  * If the HW and SW are working correctly, then it's guaranteed
 367                  * that the HW's MAC DMA is done before this point in the SW.
 368                  * To prevent the case that we handle a stale Rx descriptor,
 369                  * just assert for now until we have a way to recover.
 370                  */
 371                 if (!(__le32_to_cpu(rx_desc->attention.flags)
 372                                 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
 373                         __skb_queue_purge(amsdu);
 374                         return -EIO;
 375                 }
 376
 377                 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
 378                                         & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
 379                                            RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
 380                 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
 381                               RX_MSDU_START_INFO0_MSDU_LENGTH);
 382                 msdu_chained = rx_desc->frag_info.ring2_more_count;
 383
 384                 if (msdu_len_invalid)
 385                         msdu_len = 0;
 386
 387                 skb_trim(msdu, 0);
 388                 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
 389                 msdu_len -= msdu->len;
 390
 391                 /* Note: Chained buffers do not contain rx descriptor */
 392                 while (msdu_chained--) {
 393                         msdu = ath10k_htt_rx_netbuf_pop(htt);
 394                         if (!msdu) {
 395                                 __skb_queue_purge(amsdu);
 396                                 return -ENOENT;
 397                         }
 398
 399                         __skb_queue_tail(amsdu, msdu);
 400                         skb_trim(msdu, 0);
 401                         skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
 402                         msdu_len -= msdu->len;
 403                         msdu_chaining = 1;
 404                 }
 405
 406                 last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
 407                                 RX_MSDU_END_INFO0_LAST_MSDU;
 408
 409                 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
 410                                          sizeof(*rx_desc) - sizeof(u32));
 411
 412                 if (last_msdu)
 413                         break;
 414         }
 415
 416         if (skb_queue_empty(amsdu))
 417                 msdu_chaining = -1;
 418
 419         /*
 420          * Don't refill the ring yet.
 421          *
 422          * First, the elements popped here are still in use - it is not
 423          * safe to overwrite them until the matching call to
 424          * mpdu_desc_list_next. Second, for efficiency it is preferable to
 425          * refill the rx ring with 1 PPDU's worth of rx buffers (something
 426          * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
 427          * (something like 3 buffers). Consequently, we'll rely on the txrx
 428          * SW to tell us when it is done pulling all the PPDU's rx buffers
 429          * out of the rx ring, and then refill it just once.
 430          */
 431
 432         return msdu_chaining;
 433 }
 434
 435 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
 436                                                u64 paddr)
 437 {
 438         struct ath10k *ar = htt->ar;
 439         struct ath10k_skb_rxcb *rxcb;
 440         struct sk_buff *msdu;
 441
 442         lockdep_assert_held(&htt->rx_ring.lock);
 443
 444         msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
 445         if (!msdu)
 446                 return NULL;
 447
 448         rxcb = ATH10K_SKB_RXCB(msdu);
 449         hash_del(&rxcb->hlist);
 450         htt->rx_ring.fill_cnt--;
 451
 452         dma_unmap_single(htt->ar->dev, rxcb->paddr,
 453                          msdu->len + skb_tailroom(msdu),
 454                          DMA_FROM_DEVICE);
 455         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
 456                         msdu->data, msdu->len + skb_tailroom(msdu));
 457
 458         return msdu;
 459 }
 460
 461 static inline void ath10k_htt_append_frag_list(struct sk_buff *skb_head,
 462                                                struct sk_buff *frag_list,
 463                                                unsigned int frag_len)
 464 {
 465         skb_shinfo(skb_head)->frag_list = frag_list;
 466         skb_head->data_len = frag_len;
 467         skb_head->len += skb_head->data_len;
 468 }
 469
 470 static int ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt *htt,
 471                                              struct sk_buff *msdu,
 472                                              struct htt_rx_in_ord_msdu_desc **msdu_desc)
 473 {
 474         struct ath10k *ar = htt->ar;
 475         u32 paddr;
 476         struct sk_buff *frag_buf;
 477         struct sk_buff *prev_frag_buf;
 478         u8 last_frag;
 479         struct htt_rx_in_ord_msdu_desc *ind_desc = *msdu_desc;
 480         struct htt_rx_desc *rxd;
 481         int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
 482
 483         rxd = (void *)msdu->data;
 484         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 485
 486         skb_put(msdu, sizeof(struct htt_rx_desc));
 487         skb_pull(msdu, sizeof(struct htt_rx_desc));
 488         skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
 489         amsdu_len -= msdu->len;
 490
 491         last_frag = ind_desc->reserved;
 492         if (last_frag) {
 493                 if (amsdu_len) {
 494                         ath10k_warn(ar, "invalid amsdu len %u, left %d",
 495                                     __le16_to_cpu(ind_desc->msdu_len),
 496                                     amsdu_len);
 497                 }
 498                 return 0;
 499         }
 500
 501         ind_desc++;
 502         paddr = __le32_to_cpu(ind_desc->msdu_paddr);
 503         frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
 504         if (!frag_buf) {
 505                 ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%x", paddr);
 506                 return -ENOENT;
 507         }
 508
 509         skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
 510         ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
 511
 512         amsdu_len -= frag_buf->len;
 513         prev_frag_buf = frag_buf;
 514         last_frag = ind_desc->reserved;
 515         while (!last_frag) {
 516                 ind_desc++;
 517                 paddr = __le32_to_cpu(ind_desc->msdu_paddr);
 518                 frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
 519                 if (!frag_buf) {
 520                         ath10k_warn(ar, "failed to pop frag-n paddr: 0x%x",
 521                                     paddr);
 522                         prev_frag_buf->next = NULL;
 523                         return -ENOENT;
 524                 }
 525
 526                 skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
 527                 last_frag = ind_desc->reserved;
 528                 amsdu_len -= frag_buf->len;
 529
 530                 prev_frag_buf->next = frag_buf;
 531                 prev_frag_buf = frag_buf;
 532         }
 533
 534         if (amsdu_len) {
 535                 ath10k_warn(ar, "invalid amsdu len %u, left %d",
 536                             __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
 537         }
 538
 539         *msdu_desc = ind_desc;
 540
 541         prev_frag_buf->next = NULL;
 542         return 0;
 543 }
 544
 545 static int
 546 ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt *htt,
 547                                   struct sk_buff *msdu,
 548                                   struct htt_rx_in_ord_msdu_desc_ext **msdu_desc)
 549 {
 550         struct ath10k *ar = htt->ar;
 551         u64 paddr;
 552         struct sk_buff *frag_buf;
 553         struct sk_buff *prev_frag_buf;
 554         u8 last_frag;
 555         struct htt_rx_in_ord_msdu_desc_ext *ind_desc = *msdu_desc;
 556         struct htt_rx_desc *rxd;
 557         int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
 558
 559         rxd = (void *)msdu->data;
 560         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 561
 562         skb_put(msdu, sizeof(struct htt_rx_desc));
 563         skb_pull(msdu, sizeof(struct htt_rx_desc));
 564         skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
 565         amsdu_len -= msdu->len;
 566
 567         last_frag = ind_desc->reserved;
 568         if (last_frag) {
 569                 if (amsdu_len) {
 570                         ath10k_warn(ar, "invalid amsdu len %u, left %d",
 571                                     __le16_to_cpu(ind_desc->msdu_len),
 572                                     amsdu_len);
 573                 }
 574                 return 0;
 575         }
 576
 577         ind_desc++;
 578         paddr = __le64_to_cpu(ind_desc->msdu_paddr);
 579         frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
 580         if (!frag_buf) {
 581                 ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%llx", paddr);
 582                 return -ENOENT;
 583         }
 584
 585         skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
 586         ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
 587
 588         amsdu_len -= frag_buf->len;
 589         prev_frag_buf = frag_buf;
 590         last_frag = ind_desc->reserved;
 591         while (!last_frag) {
 592                 ind_desc++;
 593                 paddr = __le64_to_cpu(ind_desc->msdu_paddr);
 594                 frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
 595                 if (!frag_buf) {
 596                         ath10k_warn(ar, "failed to pop frag-n paddr: 0x%llx",
 597                                     paddr);
 598                         prev_frag_buf->next = NULL;
 599                         return -ENOENT;
 600                 }
 601
 602                 skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
 603                 last_frag = ind_desc->reserved;
 604                 amsdu_len -= frag_buf->len;
 605
 606                 prev_frag_buf->next = frag_buf;
 607                 prev_frag_buf = frag_buf;
 608         }
 609
 610         if (amsdu_len) {
 611                 ath10k_warn(ar, "invalid amsdu len %u, left %d",
 612                             __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
 613         }
 614
 615         *msdu_desc = ind_desc;
 616
 617         prev_frag_buf->next = NULL;
 618         return 0;
 619 }
 620
 621 static int ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt *htt,
 622                                           struct htt_rx_in_ord_ind *ev,
 623                                           struct sk_buff_head *list)
 624 {
 625         struct ath10k *ar = htt->ar;
 626         struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs32;
 627         struct htt_rx_desc *rxd;
 628         struct sk_buff *msdu;
 629         int msdu_count, ret;
 630         bool is_offload;
 631         u32 paddr;
 632
 633         lockdep_assert_held(&htt->rx_ring.lock);
 634
 635         msdu_count = __le16_to_cpu(ev->msdu_count);
 636         is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
 637
 638         while (msdu_count--) {
 639                 paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
 640
 641                 msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
 642                 if (!msdu) {
 643                         __skb_queue_purge(list);
 644                         return -ENOENT;
 645                 }
 646
 647                 if (!is_offload && ar->monitor_arvif) {
 648                         ret = ath10k_htt_rx_handle_amsdu_mon_32(htt, msdu,
 649                                                                 &msdu_desc);
 650                         if (ret) {
 651                                 __skb_queue_purge(list);
 652                                 return ret;
 653                         }
 654                         __skb_queue_tail(list, msdu);
 655                         msdu_desc++;
 656                         continue;
 657                 }
 658
 659                 __skb_queue_tail(list, msdu);
 660
 661                 if (!is_offload) {
 662                         rxd = (void *)msdu->data;
 663
 664                         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 665
 666                         skb_put(msdu, sizeof(*rxd));
 667                         skb_pull(msdu, sizeof(*rxd));
 668                         skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
 669
 670                         if (!(__le32_to_cpu(rxd->attention.flags) &
 671                               RX_ATTENTION_FLAGS_MSDU_DONE)) {
 672                                 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
 673                                 return -EIO;
 674                         }
 675                 }
 676
 677                 msdu_desc++;
 678         }
 679
 680         return 0;
 681 }
 682
 683 static int ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt *htt,
 684                                           struct htt_rx_in_ord_ind *ev,
 685                                           struct sk_buff_head *list)
 686 {
 687         struct ath10k *ar = htt->ar;
 688         struct htt_rx_in_ord_msdu_desc_ext *msdu_desc = ev->msdu_descs64;
 689         struct htt_rx_desc *rxd;
 690         struct sk_buff *msdu;
 691         int msdu_count, ret;
 692         bool is_offload;
 693         u64 paddr;
 694
 695         lockdep_assert_held(&htt->rx_ring.lock);
 696
 697         msdu_count = __le16_to_cpu(ev->msdu_count);
 698         is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
 699
 700         while (msdu_count--) {
 701                 paddr = __le64_to_cpu(msdu_desc->msdu_paddr);
 702                 msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
 703                 if (!msdu) {
 704                         __skb_queue_purge(list);
 705                         return -ENOENT;
 706                 }
 707
 708                 if (!is_offload && ar->monitor_arvif) {
 709                         ret = ath10k_htt_rx_handle_amsdu_mon_64(htt, msdu,
 710                                                                 &msdu_desc);
 711                         if (ret) {
 712                                 __skb_queue_purge(list);
 713                                 return ret;
 714                         }
 715                         __skb_queue_tail(list, msdu);
 716                         msdu_desc++;
 717                         continue;
 718                 }
 719
 720                 __skb_queue_tail(list, msdu);
 721
 722                 if (!is_offload) {
 723                         rxd = (void *)msdu->data;
 724
 725                         trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
 726
 727                         skb_put(msdu, sizeof(*rxd));
 728                         skb_pull(msdu, sizeof(*rxd));
 729                         skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
 730
 731                         if (!(__le32_to_cpu(rxd->attention.flags) &
 732                               RX_ATTENTION_FLAGS_MSDU_DONE)) {
 733                                 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
 734                                 return -EIO;
 735                         }
 736                 }
 737
 738                 msdu_desc++;
 739         }
 740
 741         return 0;
 742 }
 743
 744 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 745 {
 746         struct ath10k *ar = htt->ar;
 747         dma_addr_t paddr;
 748         void *vaddr, *vaddr_ring;
 749         size_t size;
 750         struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 751
 752         if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
 753                 return 0;
 754
 755         htt->rx_confused = false;
 756
 757         /* XXX: The fill level could be changed during runtime in response to
 758          * the host processing latency. Is this really worth it?
 759          */
 760         htt->rx_ring.size = HTT_RX_RING_SIZE;
 761         htt->rx_ring.size_mask = htt->rx_ring.size - 1;
 762         htt->rx_ring.fill_level = ar->hw_params.rx_ring_fill_level;
 763
 764         if (!is_power_of_2(htt->rx_ring.size)) {
 765                 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
 766                 return -EINVAL;
 767         }
 768
 769         htt->rx_ring.netbufs_ring =
 770                 kcalloc(htt->rx_ring.size, sizeof(struct sk_buff *),
 771                         GFP_KERNEL);
 772         if (!htt->rx_ring.netbufs_ring)
 773                 goto err_netbuf;
 774
 775         size = ath10k_htt_get_rx_ring_size(htt);
 776
 777         vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
 778         if (!vaddr_ring)
 779                 goto err_dma_ring;
 780
 781         ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
 782         htt->rx_ring.base_paddr = paddr;
 783
 784         vaddr = dma_alloc_coherent(htt->ar->dev,
 785                                    sizeof(*htt->rx_ring.alloc_idx.vaddr),
 786                                    &paddr, GFP_KERNEL);
 787         if (!vaddr)
 788                 goto err_dma_idx;
 789
 790         htt->rx_ring.alloc_idx.vaddr = vaddr;
 791         htt->rx_ring.alloc_idx.paddr = paddr;
 792         htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
 793         *htt->rx_ring.alloc_idx.vaddr = 0;
 794
 795         /* Initialize the Rx refill retry timer */
 796         timer_setup(timer, ath10k_htt_rx_ring_refill_retry, 0);
 797
 798         spin_lock_init(&htt->rx_ring.lock);
 799
 800         htt->rx_ring.fill_cnt = 0;
 801         htt->rx_ring.sw_rd_idx.msdu_payld = 0;
 802         hash_init(htt->rx_ring.skb_table);
 803
 804         skb_queue_head_init(&htt->rx_msdus_q);
 805         skb_queue_head_init(&htt->rx_in_ord_compl_q);
 806         skb_queue_head_init(&htt->tx_fetch_ind_q);
 807         atomic_set(&htt->num_mpdus_ready, 0);
 808
 809         ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
 810                    htt->rx_ring.size, htt->rx_ring.fill_level);
 811         return 0;
 812
 813 err_dma_idx:
 814         dma_free_coherent(htt->ar->dev,
 815                           ath10k_htt_get_rx_ring_size(htt),
 816                           vaddr_ring,
 817                           htt->rx_ring.base_paddr);
 818 err_dma_ring:
 819         kfree(htt->rx_ring.netbufs_ring);
 820 err_netbuf:
 821         return -ENOMEM;
 822 }
 823
 824 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
 825                                           enum htt_rx_mpdu_encrypt_type type)
 826 {
 827         switch (type) {
 828         case HTT_RX_MPDU_ENCRYPT_NONE:
 829                 return 0;
 830         case HTT_RX_MPDU_ENCRYPT_WEP40:
 831         case HTT_RX_MPDU_ENCRYPT_WEP104:
 832                 return IEEE80211_WEP_IV_LEN;
 833         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 834         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 835                 return IEEE80211_TKIP_IV_LEN;
 836         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 837                 return IEEE80211_CCMP_HDR_LEN;
 838         case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
 839                 return IEEE80211_CCMP_256_HDR_LEN;
 840         case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
 841         case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
 842                 return IEEE80211_GCMP_HDR_LEN;
 843         case HTT_RX_MPDU_ENCRYPT_WEP128:
 844         case HTT_RX_MPDU_ENCRYPT_WAPI:
 845                 break;
 846         }
 847
 848         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 849         return 0;
 850 }
 851
 852 #define MICHAEL_MIC_LEN 8
 853
 854 static int ath10k_htt_rx_crypto_mic_len(struct ath10k *ar,
 855                                         enum htt_rx_mpdu_encrypt_type type)
 856 {
 857         switch (type) {
 858         case HTT_RX_MPDU_ENCRYPT_NONE:
 859         case HTT_RX_MPDU_ENCRYPT_WEP40:
 860         case HTT_RX_MPDU_ENCRYPT_WEP104:
 861         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 862         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 863                 return 0;
 864         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 865                 return IEEE80211_CCMP_MIC_LEN;
 866         case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
 867                 return IEEE80211_CCMP_256_MIC_LEN;
 868         case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
 869         case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
 870                 return IEEE80211_GCMP_MIC_LEN;
 871         case HTT_RX_MPDU_ENCRYPT_WEP128:
 872         case HTT_RX_MPDU_ENCRYPT_WAPI:
 873                 break;
 874         }
 875
 876         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 877         return 0;
 878 }
 879
 880 static int ath10k_htt_rx_crypto_icv_len(struct ath10k *ar,
 881                                         enum htt_rx_mpdu_encrypt_type type)
 882 {
 883         switch (type) {
 884         case HTT_RX_MPDU_ENCRYPT_NONE:
 885         case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
 886         case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
 887         case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
 888         case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
 889                 return 0;
 890         case HTT_RX_MPDU_ENCRYPT_WEP40:
 891         case HTT_RX_MPDU_ENCRYPT_WEP104:
 892                 return IEEE80211_WEP_ICV_LEN;
 893         case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
 894         case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
 895                 return IEEE80211_TKIP_ICV_LEN;
 896         case HTT_RX_MPDU_ENCRYPT_WEP128:
 897         case HTT_RX_MPDU_ENCRYPT_WAPI:
 898                 break;
 899         }
 900
 901         ath10k_warn(ar, "unsupported encryption type %d\n", type);
 902         return 0;
 903 }
 904
 905 struct amsdu_subframe_hdr {
 906         u8 dst[ETH_ALEN];
 907         u8 src[ETH_ALEN];
 908         __be16 len;
 909 } __packed;
 910
 911 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
 912
 913 static inline u8 ath10k_bw_to_mac80211_bw(u8 bw)
 914 {
 915         u8 ret = 0;
 916
 917         switch (bw) {
 918         case 0:
 919                 ret = RATE_INFO_BW_20;
 920                 break;
 921         case 1:
 922                 ret = RATE_INFO_BW_40;
 923                 break;
 924         case 2:
 925                 ret = RATE_INFO_BW_80;
 926                 break;
 927         case 3:
 928                 ret = RATE_INFO_BW_160;
 929                 break;
 930         }
 931
 932         return ret;
 933 }
 934
 935 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
 936                                   struct ieee80211_rx_status *status,
 937                                   struct htt_rx_desc *rxd)
 938 {
 939         struct ieee80211_supported_band *sband;
 940         u8 cck, rate, bw, sgi, mcs, nss;
 941         u8 preamble = 0;
 942         u8 group_id;
 943         u32 info1, info2, info3;
 944
 945         info1 = __le32_to_cpu(rxd->ppdu_start.info1);
 946         info2 = __le32_to_cpu(rxd->ppdu_start.info2);
 947         info3 = __le32_to_cpu(rxd->ppdu_start.info3);
 948
 949         preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
 950
 951         switch (preamble) {
 952         case HTT_RX_LEGACY:
 953                 /* To get legacy rate index band is required. Since band can't
 954                  * be undefined check if freq is non-zero.
 955                  */
 956                 if (!status->freq)
 957                         return;
 958
 959                 cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
 960                 rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
 961                 rate &= ~RX_PPDU_START_RATE_FLAG;
 962
 963                 sband = &ar->mac.sbands[status->band];
 964                 status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
 965                 break;
 966         case HTT_RX_HT:
 967         case HTT_RX_HT_WITH_TXBF:
 968                 /* HT-SIG - Table 20-11 in info2 and info3 */
 969                 mcs = info2 & 0x1F;
 970                 nss = mcs >> 3;
 971                 bw = (info2 >> 7) & 1;
 972                 sgi = (info3 >> 7) & 1;
 973
 974                 status->rate_idx = mcs;
 975                 status->encoding = RX_ENC_HT;
 976                 if (sgi)
 977                         status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
 978                 if (bw)
 979                         status->bw = RATE_INFO_BW_40;
 980                 break;
 981         case HTT_RX_VHT:
 982         case HTT_RX_VHT_WITH_TXBF:
 983                 /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
 984                  * TODO check this
 985                  */
 986                 bw = info2 & 3;
 987                 sgi = info3 & 1;
 988                 group_id = (info2 >> 4) & 0x3F;
 989
 990                 if (GROUP_ID_IS_SU_MIMO(group_id)) {
 991                         mcs = (info3 >> 4) & 0x0F;
 992                         nss = ((info2 >> 10) & 0x07) + 1;
 993                 } else {
 994                         /* Hardware doesn't decode VHT-SIG-B into Rx descriptor
 995                          * so it's impossible to decode MCS. Also since
 996                          * firmware consumes Group Id Management frames host
 997                          * has no knowledge regarding group/user position
 998                          * mapping so it's impossible to pick the correct Nsts
 999                          * from VHT-SIG-A1.
1000                          *
1001                          * Bandwidth and SGI are valid so report the rateinfo
1002                          * on best-effort basis.
1003                          */
1004                         mcs = 0;
1005                         nss = 1;
1006                 }
1007
1008                 if (mcs > 0x09) {
1009                         ath10k_warn(ar, "invalid MCS received %u\n", mcs);
1010                         ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
1011                                     __le32_to_cpu(rxd->attention.flags),
1012                                     __le32_to_cpu(rxd->mpdu_start.info0),
1013                                     __le32_to_cpu(rxd->mpdu_start.info1),
1014                                     __le32_to_cpu(rxd->msdu_start.common.info0),
1015                                     __le32_to_cpu(rxd->msdu_start.common.info1),
1016                                     rxd->ppdu_start.info0,
1017                                     __le32_to_cpu(rxd->ppdu_start.info1),
1018                                     __le32_to_cpu(rxd->ppdu_start.info2),
1019                                     __le32_to_cpu(rxd->ppdu_start.info3),
1020                                     __le32_to_cpu(rxd->ppdu_start.info4));
1021
1022                         ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
1023                                     __le32_to_cpu(rxd->msdu_end.common.info0),
1024                                     __le32_to_cpu(rxd->mpdu_end.info0));
1025
1026                         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
1027                                         "rx desc msdu payload: ",
1028                                         rxd->msdu_payload, 50);
1029                 }
1030
1031                 status->rate_idx = mcs;
1032                 status->nss = nss;
1033
1034                 if (sgi)
1035                         status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1036
1037                 status->bw = ath10k_bw_to_mac80211_bw(bw);
1038                 status->encoding = RX_ENC_VHT;
1039                 break;
1040         default:
1041                 break;
1042         }
1043 }
1044
1045 static struct ieee80211_channel *
1046 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
1047 {
1048         struct ath10k_peer *peer;
1049         struct ath10k_vif *arvif;
1050         struct cfg80211_chan_def def;
1051         u16 peer_id;
1052
1053         lockdep_assert_held(&ar->data_lock);
1054
1055         if (!rxd)
1056                 return NULL;
1057
1058         if (rxd->attention.flags &
1059             __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
1060                 return NULL;
1061
1062         if (!(rxd->msdu_end.common.info0 &
1063               __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
1064                 return NULL;
1065
1066         peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1067                      RX_MPDU_START_INFO0_PEER_IDX);
1068
1069         peer = ath10k_peer_find_by_id(ar, peer_id);
1070         if (!peer)
1071                 return NULL;
1072
1073         arvif = ath10k_get_arvif(ar, peer->vdev_id);
1074         if (WARN_ON_ONCE(!arvif))
1075                 return NULL;
1076
1077         if (ath10k_mac_vif_chan(arvif->vif, &def))
1078                 return NULL;
1079
1080         return def.chan;
1081 }
1082
1083 static struct ieee80211_channel *
1084 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
1085 {
1086         struct ath10k_vif *arvif;
1087         struct cfg80211_chan_def def;
1088
1089         lockdep_assert_held(&ar->data_lock);
1090
1091         list_for_each_entry(arvif, &ar->arvifs, list) {
1092                 if (arvif->vdev_id == vdev_id &&
1093                     ath10k_mac_vif_chan(arvif->vif, &def) == 0)
1094                         return def.chan;
1095         }
1096
1097         return NULL;
1098 }
1099
1100 static void
1101 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
1102                               struct ieee80211_chanctx_conf *conf,
1103                               void *data)
1104 {
1105         struct cfg80211_chan_def *def = data;
1106
1107         *def = conf->def;
1108 }
1109
1110 static struct ieee80211_channel *
1111 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
1112 {
1113         struct cfg80211_chan_def def = {};
1114
1115         ieee80211_iter_chan_contexts_atomic(ar->hw,
1116                                             ath10k_htt_rx_h_any_chan_iter,
1117                                             &def);
1118
1119         return def.chan;
1120 }
1121
1122 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
1123                                     struct ieee80211_rx_status *status,
1124                                     struct htt_rx_desc *rxd,
1125                                     u32 vdev_id)
1126 {
1127         struct ieee80211_channel *ch;
1128
1129         spin_lock_bh(&ar->data_lock);
1130         ch = ar->scan_channel;
1131         if (!ch)
1132                 ch = ar->rx_channel;
1133         if (!ch)
1134                 ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
1135         if (!ch)
1136                 ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
1137         if (!ch)
1138                 ch = ath10k_htt_rx_h_any_channel(ar);
1139         if (!ch)
1140                 ch = ar->tgt_oper_chan;
1141         spin_unlock_bh(&ar->data_lock);
1142
1143         if (!ch)
1144                 return false;
1145
1146         status->band = ch->band;
1147         status->freq = ch->center_freq;
1148
1149         return true;
1150 }
1151
1152 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
1153                                    struct ieee80211_rx_status *status,
1154                                    struct htt_rx_desc *rxd)
1155 {
1156         int i;
1157
1158         for (i = 0; i < IEEE80211_MAX_CHAINS ; i++) {
1159                 status->chains &= ~BIT(i);
1160
1161                 if (rxd->ppdu_start.rssi_chains[i].pri20_mhz != 0x80) {
1162                         status->chain_signal[i] = ATH10K_DEFAULT_NOISE_FLOOR +
1163                                 rxd->ppdu_start.rssi_chains[i].pri20_mhz;
1164
1165                         status->chains |= BIT(i);
1166                 }
1167         }
1168
1169         /* FIXME: Get real NF */
1170         status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
1171                          rxd->ppdu_start.rssi_comb;
1172         status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
1173 }
1174
1175 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
1176                                     struct ieee80211_rx_status *status,
1177                                     struct htt_rx_desc *rxd)
1178 {
1179         /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
1180          * means all prior MSDUs in a PPDU are reported to mac80211 without the
1181          * TSF. Is it worth holding frames until end of PPDU is known?
1182          *
1183          * FIXME: Can we get/compute 64bit TSF?
1184          */
1185         status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
1186         status->flag |= RX_FLAG_MACTIME_END;
1187 }
1188
1189 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
1190                                  struct sk_buff_head *amsdu,
1191                                  struct ieee80211_rx_status *status,
1192                                  u32 vdev_id)
1193 {
1194         struct sk_buff *first;
1195         struct htt_rx_desc *rxd;
1196         bool is_first_ppdu;
1197         bool is_last_ppdu;
1198
1199         if (skb_queue_empty(amsdu))
1200                 return;
1201
1202         first = skb_peek(amsdu);
1203         rxd = (void *)first->data - sizeof(*rxd);
1204
1205         is_first_ppdu = !!(rxd->attention.flags &
1206                            __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
1207         is_last_ppdu = !!(rxd->attention.flags &
1208                           __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
1209
1210         if (is_first_ppdu) {
1211                 /* New PPDU starts so clear out the old per-PPDU status. */
1212                 status->freq = 0;
1213                 status->rate_idx = 0;
1214                 status->nss = 0;
1215                 status->encoding = RX_ENC_LEGACY;
1216                 status->bw = RATE_INFO_BW_20;
1217
1218                 status->flag &= ~RX_FLAG_MACTIME_END;
1219                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1220
1221                 status->flag &= ~(RX_FLAG_AMPDU_IS_LAST);
1222                 status->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
1223                 status->ampdu_reference = ar->ampdu_reference;
1224
1225                 ath10k_htt_rx_h_signal(ar, status, rxd);
1226                 ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
1227                 ath10k_htt_rx_h_rates(ar, status, rxd);
1228         }
1229
1230         if (is_last_ppdu) {
1231                 ath10k_htt_rx_h_mactime(ar, status, rxd);
1232
1233                 /* set ampdu last segment flag */
1234                 status->flag |= RX_FLAG_AMPDU_IS_LAST;
1235                 ar->ampdu_reference++;
1236         }
1237 }
1238
1239 static const char * const tid_to_ac[] = {
1240         "BE",
1241         "BK",
1242         "BK",
1243         "BE",
1244         "VI",
1245         "VI",
1246         "VO",
1247         "VO",
1248 };
1249
1250 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
1251 {
1252         u8 *qc;
1253         int tid;
1254
1255         if (!ieee80211_is_data_qos(hdr->frame_control))
1256                 return "";
1257
1258         qc = ieee80211_get_qos_ctl(hdr);
1259         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1260         if (tid < 8)
1261                 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
1262         else
1263                 snprintf(out, size, "tid %d", tid);
1264
1265         return out;
1266 }
1267
1268 static void ath10k_htt_rx_h_queue_msdu(struct ath10k *ar,
1269                                        struct ieee80211_rx_status *rx_status,
1270                                        struct sk_buff *skb)
1271 {
1272         struct ieee80211_rx_status *status;
1273
1274         status = IEEE80211_SKB_RXCB(skb);
1275         *status = *rx_status;
1276
1277         skb_queue_tail(&ar->htt.rx_msdus_q, skb);
1278 }
1279
1280 static void ath10k_process_rx(struct ath10k *ar, struct sk_buff *skb)
1281 {
1282         struct ieee80211_rx_status *status;
1283         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1284         char tid[32];
1285
1286         status = IEEE80211_SKB_RXCB(skb);
1287
1288         if (!(ar->filter_flags & FIF_FCSFAIL) &&
1289             status->flag & RX_FLAG_FAILED_FCS_CRC) {
1290                 ar->stats.rx_crc_err_drop++;
1291                 dev_kfree_skb_any(skb);
1292                 return;
1293         }
1294
1295         ath10k_dbg(ar, ATH10K_DBG_DATA,
1296                    "rx skb %pK len %u peer %pM %s %s sn %u %s%s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i mic-err %i amsdu-more %i\n",
1297                    skb,
1298                    skb->len,
1299                    ieee80211_get_SA(hdr),
1300                    ath10k_get_tid(hdr, tid, sizeof(tid)),
1301                    is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
1302                                                         "mcast" : "ucast",
1303                    (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
1304                    (status->encoding == RX_ENC_LEGACY) ? "legacy" : "",
1305                    (status->encoding == RX_ENC_HT) ? "ht" : "",
1306                    (status->encoding == RX_ENC_VHT) ? "vht" : "",
1307                    (status->bw == RATE_INFO_BW_40) ? "40" : "",
1308                    (status->bw == RATE_INFO_BW_80) ? "80" : "",
1309                    (status->bw == RATE_INFO_BW_160) ? "160" : "",
1310                    status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "",
1311                    status->rate_idx,
1312                    status->nss,
1313                    status->freq,
1314                    status->band, status->flag,
1315                    !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1316                    !!(status->flag & RX_FLAG_MMIC_ERROR),
1317                    !!(status->flag & RX_FLAG_AMSDU_MORE));
1318         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1319                         skb->data, skb->len);
1320         trace_ath10k_rx_hdr(ar, skb->data, skb->len);
1321         trace_ath10k_rx_payload(ar, skb->data, skb->len);
1322
1323         ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
1324 }
1325
1326 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
1327                                       struct ieee80211_hdr *hdr)
1328 {
1329         int len = ieee80211_hdrlen(hdr->frame_control);
1330
1331         if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
1332                       ar->running_fw->fw_file.fw_features))
1333                 len = round_up(len, 4);
1334
1335         return len;
1336 }
1337
1338 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
1339                                         struct sk_buff *msdu,
1340                                         struct ieee80211_rx_status *status,
1341                                         enum htt_rx_mpdu_encrypt_type enctype,
1342                                         bool is_decrypted,
1343                                         const u8 first_hdr[64])
1344 {
1345         struct ieee80211_hdr *hdr;
1346         struct htt_rx_desc *rxd;
1347         size_t hdr_len;
1348         size_t crypto_len;
1349         bool is_first;
1350         bool is_last;
1351         bool msdu_limit_err;
1352         int bytes_aligned = ar->hw_params.decap_align_bytes;
1353         u8 *qos;
1354
1355         rxd = (void *)msdu->data - sizeof(*rxd);
1356         is_first = !!(rxd->msdu_end.common.info0 &
1357                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1358         is_last = !!(rxd->msdu_end.common.info0 &
1359                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1360
1361         /* Delivered decapped frame:
1362          * [802.11 header]
1363          * [crypto param] <-- can be trimmed if !fcs_err &&
1364          *                    !decrypt_err && !peer_idx_invalid
1365          * [amsdu header] <-- only if A-MSDU
1366          * [rfc1042/llc]
1367          * [payload]
1368          * [FCS] <-- at end, needs to be trimmed
1369          */
1370
1371         /* Some hardwares(QCA99x0 variants) limit number of msdus in a-msdu when
1372          * deaggregate, so that unwanted MSDU-deaggregation is avoided for
1373          * error packets. If limit exceeds, hw sends all remaining MSDUs as
1374          * a single last MSDU with this msdu limit error set.
1375          */
1376         msdu_limit_err = ath10k_rx_desc_msdu_limit_error(&ar->hw_params, rxd);
1377
1378         /* If MSDU limit error happens, then don't warn on, the partial raw MSDU
1379          * without first MSDU is expected in that case, and handled later here.
1380          */
1381         /* This probably shouldn't happen but warn just in case */
1382         if (WARN_ON_ONCE(!is_first && !msdu_limit_err))
1383                 return;
1384
1385         /* This probably shouldn't happen but warn just in case */
1386         if (WARN_ON_ONCE(!(is_first && is_last) && !msdu_limit_err))
1387                 return;
1388
1389         skb_trim(msdu, msdu->len - FCS_LEN);
1390
1391         /* Push original 80211 header */
1392         if (unlikely(msdu_limit_err)) {
1393                 hdr = (struct ieee80211_hdr *)first_hdr;
1394                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1395                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1396
1397                 if (ieee80211_is_data_qos(hdr->frame_control)) {
1398                         qos = ieee80211_get_qos_ctl(hdr);
1399                         qos[0] |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1400                 }
1401
1402                 if (crypto_len)
1403                         memcpy(skb_push(msdu, crypto_len),
1404                                (void *)hdr + round_up(hdr_len, bytes_aligned),
1405                                crypto_len);
1406
1407                 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1408         }
1409
1410         /* In most cases this will be true for sniffed frames. It makes sense
1411          * to deliver them as-is without stripping the crypto param. This is
1412          * necessary for software based decryption.
1413          *
1414          * If there's no error then the frame is decrypted. At least that is
1415          * the case for frames that come in via fragmented rx indication.
1416          */
1417         if (!is_decrypted)
1418                 return;
1419
1420         /* The payload is decrypted so strip crypto params. Start from tail
1421          * since hdr is used to compute some stuff.
1422          */
1423
1424         hdr = (void *)msdu->data;
1425
1426         /* Tail */
1427         if (status->flag & RX_FLAG_IV_STRIPPED) {
1428                 skb_trim(msdu, msdu->len -
1429                          ath10k_htt_rx_crypto_mic_len(ar, enctype));
1430
1431                 skb_trim(msdu, msdu->len -
1432                          ath10k_htt_rx_crypto_icv_len(ar, enctype));
1433         } else {
1434                 /* MIC */
1435                 if (status->flag & RX_FLAG_MIC_STRIPPED)
1436                         skb_trim(msdu, msdu->len -
1437                                  ath10k_htt_rx_crypto_mic_len(ar, enctype));
1438
1439                 /* ICV */
1440                 if (status->flag & RX_FLAG_ICV_STRIPPED)
1441                         skb_trim(msdu, msdu->len -
1442                                  ath10k_htt_rx_crypto_icv_len(ar, enctype));
1443         }
1444
1445         /* MMIC */
1446         if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1447             !ieee80211_has_morefrags(hdr->frame_control) &&
1448             enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1449                 skb_trim(msdu, msdu->len - MICHAEL_MIC_LEN);
1450
1451         /* Head */
1452         if (status->flag & RX_FLAG_IV_STRIPPED) {
1453                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1454                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1455
1456                 memmove((void *)msdu->data + crypto_len,
1457                         (void *)msdu->data, hdr_len);
1458                 skb_pull(msdu, crypto_len);
1459         }
1460 }
1461
1462 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1463                                           struct sk_buff *msdu,
1464                                           struct ieee80211_rx_status *status,
1465                                           const u8 first_hdr[64],
1466                                           enum htt_rx_mpdu_encrypt_type enctype)
1467 {
1468         struct ieee80211_hdr *hdr;
1469         struct htt_rx_desc *rxd;
1470         size_t hdr_len;
1471         u8 da[ETH_ALEN];
1472         u8 sa[ETH_ALEN];
1473         int l3_pad_bytes;
1474         int bytes_aligned = ar->hw_params.decap_align_bytes;
1475
1476         /* Delivered decapped frame:
1477          * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1478          * [rfc1042/llc]
1479          *
1480          * Note: The nwifi header doesn't have QoS Control and is
1481          * (always?) a 3addr frame.
1482          *
1483          * Note2: There's no A-MSDU subframe header. Even if it's part
1484          * of an A-MSDU.
1485          */
1486
1487         /* pull decapped header and copy SA & DA */
1488         rxd = (void *)msdu->data - sizeof(*rxd);
1489
1490         l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1491         skb_put(msdu, l3_pad_bytes);
1492
1493         hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes);
1494
1495         hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1496         ether_addr_copy(da, ieee80211_get_DA(hdr));
1497         ether_addr_copy(sa, ieee80211_get_SA(hdr));
1498         skb_pull(msdu, hdr_len);
1499
1500         /* push original 802.11 header */
1501         hdr = (struct ieee80211_hdr *)first_hdr;
1502         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1503
1504         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1505                 memcpy(skb_push(msdu,
1506                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1507                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1508                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1509         }
1510
1511         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1512
1513         /* original 802.11 header has a different DA and in
1514          * case of 4addr it may also have different SA
1515          */
1516         hdr = (struct ieee80211_hdr *)msdu->data;
1517         ether_addr_copy(ieee80211_get_DA(hdr), da);
1518         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1519 }
1520
1521 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1522                                           struct sk_buff *msdu,
1523                                           enum htt_rx_mpdu_encrypt_type enctype)
1524 {
1525         struct ieee80211_hdr *hdr;
1526         struct htt_rx_desc *rxd;
1527         size_t hdr_len, crypto_len;
1528         void *rfc1042;
1529         bool is_first, is_last, is_amsdu;
1530         int bytes_aligned = ar->hw_params.decap_align_bytes;
1531
1532         rxd = (void *)msdu->data - sizeof(*rxd);
1533         hdr = (void *)rxd->rx_hdr_status;
1534
1535         is_first = !!(rxd->msdu_end.common.info0 &
1536                       __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1537         is_last = !!(rxd->msdu_end.common.info0 &
1538                      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1539         is_amsdu = !(is_first && is_last);
1540
1541         rfc1042 = hdr;
1542
1543         if (is_first) {
1544                 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1545                 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1546
1547                 rfc1042 += round_up(hdr_len, bytes_aligned) +
1548                            round_up(crypto_len, bytes_aligned);
1549         }
1550
1551         if (is_amsdu)
1552                 rfc1042 += sizeof(struct amsdu_subframe_hdr);
1553
1554         return rfc1042;
1555 }
1556
1557 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1558                                         struct sk_buff *msdu,
1559                                         struct ieee80211_rx_status *status,
1560                                         const u8 first_hdr[64],
1561                                         enum htt_rx_mpdu_encrypt_type enctype)
1562 {
1563         struct ieee80211_hdr *hdr;
1564         struct ethhdr *eth;
1565         size_t hdr_len;
1566         void *rfc1042;
1567         u8 da[ETH_ALEN];
1568         u8 sa[ETH_ALEN];
1569         int l3_pad_bytes;
1570         struct htt_rx_desc *rxd;
1571         int bytes_aligned = ar->hw_params.decap_align_bytes;
1572
1573         /* Delivered decapped frame:
1574          * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1575          * [payload]
1576          */
1577
1578         rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1579         if (WARN_ON_ONCE(!rfc1042))
1580                 return;
1581
1582         rxd = (void *)msdu->data - sizeof(*rxd);
1583         l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1584         skb_put(msdu, l3_pad_bytes);
1585         skb_pull(msdu, l3_pad_bytes);
1586
1587         /* pull decapped header and copy SA & DA */
1588         eth = (struct ethhdr *)msdu->data;
1589         ether_addr_copy(da, eth->h_dest);
1590         ether_addr_copy(sa, eth->h_source);
1591         skb_pull(msdu, sizeof(struct ethhdr));
1592
1593         /* push rfc1042/llc/snap */
1594         memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1595                sizeof(struct rfc1042_hdr));
1596
1597         /* push original 802.11 header */
1598         hdr = (struct ieee80211_hdr *)first_hdr;
1599         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1600
1601         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1602                 memcpy(skb_push(msdu,
1603                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1604                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1605                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1606         }
1607
1608         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1609
1610         /* original 802.11 header has a different DA and in
1611          * case of 4addr it may also have different SA
1612          */
1613         hdr = (struct ieee80211_hdr *)msdu->data;
1614         ether_addr_copy(ieee80211_get_DA(hdr), da);
1615         ether_addr_copy(ieee80211_get_SA(hdr), sa);
1616 }
1617
1618 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1619                                          struct sk_buff *msdu,
1620                                          struct ieee80211_rx_status *status,
1621                                          const u8 first_hdr[64],
1622                                          enum htt_rx_mpdu_encrypt_type enctype)
1623 {
1624         struct ieee80211_hdr *hdr;
1625         size_t hdr_len;
1626         int l3_pad_bytes;
1627         struct htt_rx_desc *rxd;
1628         int bytes_aligned = ar->hw_params.decap_align_bytes;
1629
1630         /* Delivered decapped frame:
1631          * [amsdu header] <-- replaced with 802.11 hdr
1632          * [rfc1042/llc]
1633          * [payload]
1634          */
1635
1636         rxd = (void *)msdu->data - sizeof(*rxd);
1637         l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1638
1639         skb_put(msdu, l3_pad_bytes);
1640         skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes);
1641
1642         hdr = (struct ieee80211_hdr *)first_hdr;
1643         hdr_len = ieee80211_hdrlen(hdr->frame_control);
1644
1645         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1646                 memcpy(skb_push(msdu,
1647                                 ath10k_htt_rx_crypto_param_len(ar, enctype)),
1648                        (void *)hdr + round_up(hdr_len, bytes_aligned),
1649                         ath10k_htt_rx_crypto_param_len(ar, enctype));
1650         }
1651
1652         memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1653 }
1654
1655 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1656                                     struct sk_buff *msdu,
1657                                     struct ieee80211_rx_status *status,
1658                                     u8 first_hdr[64],
1659                                     enum htt_rx_mpdu_encrypt_type enctype,
1660                                     bool is_decrypted)
1661 {
1662         struct htt_rx_desc *rxd;
1663         enum rx_msdu_decap_format decap;
1664
1665         /* First msdu's decapped header:
1666          * [802.11 header] <-- padded to 4 bytes long
1667          * [crypto param] <-- padded to 4 bytes long
1668          * [amsdu header] <-- only if A-MSDU
1669          * [rfc1042/llc]
1670          *
1671          * Other (2nd, 3rd, ..) msdu's decapped header:
1672          * [amsdu header] <-- only if A-MSDU
1673          * [rfc1042/llc]
1674          */
1675
1676         rxd = (void *)msdu->data - sizeof(*rxd);
1677         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1678                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1679
1680         switch (decap) {
1681         case RX_MSDU_DECAP_RAW:
1682                 ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1683                                             is_decrypted, first_hdr);
1684                 break;
1685         case RX_MSDU_DECAP_NATIVE_WIFI:
1686                 ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
1687                                               enctype);
1688                 break;
1689         case RX_MSDU_DECAP_ETHERNET2_DIX:
1690                 ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1691                 break;
1692         case RX_MSDU_DECAP_8023_SNAP_LLC:
1693                 ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr,
1694                                              enctype);
1695                 break;
1696         }
1697 }
1698
1699 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1700 {
1701         struct htt_rx_desc *rxd;
1702         u32 flags, info;
1703         bool is_ip4, is_ip6;
1704         bool is_tcp, is_udp;
1705         bool ip_csum_ok, tcpudp_csum_ok;
1706
1707         rxd = (void *)skb->data - sizeof(*rxd);
1708         flags = __le32_to_cpu(rxd->attention.flags);
1709         info = __le32_to_cpu(rxd->msdu_start.common.info1);
1710
1711         is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1712         is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1713         is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1714         is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1715         ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1716         tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1717
1718         if (!is_ip4 && !is_ip6)
1719                 return CHECKSUM_NONE;
1720         if (!is_tcp && !is_udp)
1721                 return CHECKSUM_NONE;
1722         if (!ip_csum_ok)
1723                 return CHECKSUM_NONE;
1724         if (!tcpudp_csum_ok)
1725                 return CHECKSUM_NONE;
1726
1727         return CHECKSUM_UNNECESSARY;
1728 }
1729
1730 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
1731 {
1732         msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
1733 }
1734
1735 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1736                                  struct sk_buff_head *amsdu,
1737                                  struct ieee80211_rx_status *status,
1738                                  bool fill_crypt_header,
1739                                  u8 *rx_hdr,
1740                                  enum ath10k_pkt_rx_err *err)
1741 {
1742         struct sk_buff *first;
1743         struct sk_buff *last;
1744         struct sk_buff *msdu;
1745         struct htt_rx_desc *rxd;
1746         struct ieee80211_hdr *hdr;
1747         enum htt_rx_mpdu_encrypt_type enctype;
1748         u8 first_hdr[64];
1749         u8 *qos;
1750         bool has_fcs_err;
1751         bool has_crypto_err;
1752         bool has_tkip_err;
1753         bool has_peer_idx_invalid;
1754         bool is_decrypted;
1755         bool is_mgmt;
1756         u32 attention;
1757
1758         if (skb_queue_empty(amsdu))
1759                 return;
1760
1761         first = skb_peek(amsdu);
1762         rxd = (void *)first->data - sizeof(*rxd);
1763
1764         is_mgmt = !!(rxd->attention.flags &
1765                      __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1766
1767         enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1768                      RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1769
1770         /* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1771          * decapped header. It'll be used for undecapping of each MSDU.
1772          */
1773         hdr = (void *)rxd->rx_hdr_status;
1774         memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1775
1776         if (rx_hdr)
1777                 memcpy(rx_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1778
1779         /* Each A-MSDU subframe will use the original header as the base and be
1780          * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1781          */
1782         hdr = (void *)first_hdr;
1783
1784         if (ieee80211_is_data_qos(hdr->frame_control)) {
1785                 qos = ieee80211_get_qos_ctl(hdr);
1786                 qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1787         }
1788
1789         /* Some attention flags are valid only in the last MSDU. */
1790         last = skb_peek_tail(amsdu);
1791         rxd = (void *)last->data - sizeof(*rxd);
1792         attention = __le32_to_cpu(rxd->attention.flags);
1793
1794         has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1795         has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1796         has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1797         has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1798
1799         /* Note: If hardware captures an encrypted frame that it can't decrypt,
1800          * e.g. due to fcs error, missing peer or invalid key data it will
1801          * report the frame as raw.
1802          */
1803         is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
1804                         !has_fcs_err &&
1805                         !has_crypto_err &&
1806                         !has_peer_idx_invalid);
1807
1808         /* Clear per-MPDU flags while leaving per-PPDU flags intact. */
1809         status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
1810                           RX_FLAG_MMIC_ERROR |
1811                           RX_FLAG_DECRYPTED |
1812                           RX_FLAG_IV_STRIPPED |
1813                           RX_FLAG_ONLY_MONITOR |
1814                           RX_FLAG_MMIC_STRIPPED);
1815
1816         if (has_fcs_err)
1817                 status->flag |= RX_FLAG_FAILED_FCS_CRC;
1818
1819         if (has_tkip_err)
1820                 status->flag |= RX_FLAG_MMIC_ERROR;
1821
1822         if (err) {
1823                 if (has_fcs_err)
1824                         *err = ATH10K_PKT_RX_ERR_FCS;
1825                 else if (has_tkip_err)
1826                         *err = ATH10K_PKT_RX_ERR_TKIP;
1827                 else if (has_crypto_err)
1828                         *err = ATH10K_PKT_RX_ERR_CRYPT;
1829                 else if (has_peer_idx_invalid)
1830                         *err = ATH10K_PKT_RX_ERR_PEER_IDX_INVAL;
1831         }
1832
1833         /* Firmware reports all necessary management frames via WMI already.
1834          * They are not reported to monitor interfaces at all so pass the ones
1835          * coming via HTT to monitor interfaces instead. This simplifies
1836          * matters a lot.
1837          */
1838         if (is_mgmt)
1839                 status->flag |= RX_FLAG_ONLY_MONITOR;
1840
1841         if (is_decrypted) {
1842                 status->flag |= RX_FLAG_DECRYPTED;
1843
1844                 if (likely(!is_mgmt))
1845                         status->flag |= RX_FLAG_MMIC_STRIPPED;
1846
1847                 if (fill_crypt_header)
1848                         status->flag |= RX_FLAG_MIC_STRIPPED |
1849                                         RX_FLAG_ICV_STRIPPED;
1850                 else
1851                         status->flag |= RX_FLAG_IV_STRIPPED;
1852         }
1853
1854         skb_queue_walk(amsdu, msdu) {
1855                 ath10k_htt_rx_h_csum_offload(msdu);
1856                 ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
1857                                         is_decrypted);
1858
1859                 /* Undecapping involves copying the original 802.11 header back
1860                  * to sk_buff. If frame is protected and hardware has decrypted
1861                  * it then remove the protected bit.
1862                  */
1863                 if (!is_decrypted)
1864                         continue;
1865                 if (is_mgmt)
1866                         continue;
1867
1868                 if (fill_crypt_header)
1869                         continue;
1870
1871                 hdr = (void *)msdu->data;
1872                 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1873         }
1874 }
1875
1876 static void ath10k_htt_rx_h_enqueue(struct ath10k *ar,
1877                                     struct sk_buff_head *amsdu,
1878                                     struct ieee80211_rx_status *status)
1879 {
1880         struct sk_buff *msdu;
1881         struct sk_buff *first_subframe;
1882
1883         first_subframe = skb_peek(amsdu);
1884
1885         while ((msdu = __skb_dequeue(amsdu))) {
1886                 /* Setup per-MSDU flags */
1887                 if (skb_queue_empty(amsdu))
1888                         status->flag &= ~RX_FLAG_AMSDU_MORE;
1889                 else
1890                         status->flag |= RX_FLAG_AMSDU_MORE;
1891
1892                 if (msdu == first_subframe) {
1893                         first_subframe = NULL;
1894                         status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
1895                 } else {
1896                         status->flag |= RX_FLAG_ALLOW_SAME_PN;
1897                 }
1898
1899                 ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
1900         }
1901 }
1902
1903 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu,
1904                                unsigned long *unchain_cnt)
1905 {
1906         struct sk_buff *skb, *first;
1907         int space;
1908         int total_len = 0;
1909         int amsdu_len = skb_queue_len(amsdu);
1910
1911         /* TODO:  Might could optimize this by using
1912          * skb_try_coalesce or similar method to
1913          * decrease copying, or maybe get mac80211 to
1914          * provide a way to just receive a list of
1915          * skb?
1916          */
1917
1918         first = __skb_dequeue(amsdu);
1919
1920         /* Allocate total length all at once. */
1921         skb_queue_walk(amsdu, skb)
1922                 total_len += skb->len;
1923
1924         space = total_len - skb_tailroom(first);
1925         if ((space > 0) &&
1926             (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
1927                 /* TODO:  bump some rx-oom error stat */
1928                 /* put it back together so we can free the
1929                  * whole list at once.
1930                  */
1931                 __skb_queue_head(amsdu, first);
1932                 return -1;
1933         }
1934
1935         /* Walk list again, copying contents into
1936          * msdu_head
1937          */
1938         while ((skb = __skb_dequeue(amsdu))) {
1939                 skb_copy_from_linear_data(skb, skb_put(first, skb->len),
1940                                           skb->len);
1941                 dev_kfree_skb_any(skb);
1942         }
1943
1944         __skb_queue_head(amsdu, first);
1945
1946         *unchain_cnt += amsdu_len - 1;
1947
1948         return 0;
1949 }
1950
1951 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
1952                                     struct sk_buff_head *amsdu,
1953                                     unsigned long *drop_cnt,
1954                                     unsigned long *unchain_cnt)
1955 {
1956         struct sk_buff *first;
1957         struct htt_rx_desc *rxd;
1958         enum rx_msdu_decap_format decap;
1959
1960         first = skb_peek(amsdu);
1961         rxd = (void *)first->data - sizeof(*rxd);
1962         decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1963                    RX_MSDU_START_INFO1_DECAP_FORMAT);
1964
1965         /* FIXME: Current unchaining logic can only handle simple case of raw
1966          * msdu chaining. If decapping is other than raw the chaining may be
1967          * more complex and this isn't handled by the current code. Don't even
1968          * try re-constructing such frames - it'll be pretty much garbage.
1969          */
1970         if (decap != RX_MSDU_DECAP_RAW ||
1971             skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
1972                 *drop_cnt += skb_queue_len(amsdu);
1973                 __skb_queue_purge(amsdu);
1974                 return;
1975         }
1976
1977         ath10k_unchain_msdu(amsdu, unchain_cnt);
1978 }
1979
1980 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
1981                                         struct sk_buff_head *amsdu,
1982                                         struct ieee80211_rx_status *rx_status)
1983 {
1984         /* FIXME: It might be a good idea to do some fuzzy-testing to drop
1985          * invalid/dangerous frames.
1986          */
1987
1988         if (!rx_status->freq) {
1989                 ath10k_dbg(ar, ATH10K_DBG_HTT, "no channel configured; ignoring frame(s)!\n");
1990                 return false;
1991         }
1992
1993         if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
1994                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1995                 return false;
1996         }
1997
1998         return true;
1999 }
2000
2001 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
2002                                    struct sk_buff_head *amsdu,
2003                                    struct ieee80211_rx_status *rx_status,
2004                                    unsigned long *drop_cnt)
2005 {
2006         if (skb_queue_empty(amsdu))
2007                 return;
2008
2009         if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
2010                 return;
2011
2012         if (drop_cnt)
2013                 *drop_cnt += skb_queue_len(amsdu);
2014
2015         __skb_queue_purge(amsdu);
2016 }
2017
2018 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
2019 {
2020         struct ath10k *ar = htt->ar;
2021         struct ieee80211_rx_status *rx_status = &htt->rx_status;
2022         struct sk_buff_head amsdu;
2023         int ret;
2024         unsigned long drop_cnt = 0;
2025         unsigned long unchain_cnt = 0;
2026         unsigned long drop_cnt_filter = 0;
2027         unsigned long msdus_to_queue, num_msdus;
2028         enum ath10k_pkt_rx_err err = ATH10K_PKT_RX_ERR_MAX;
2029         u8 first_hdr[RX_HTT_HDR_STATUS_LEN];
2030
2031         __skb_queue_head_init(&amsdu);
2032
2033         spin_lock_bh(&htt->rx_ring.lock);
2034         if (htt->rx_confused) {
2035                 spin_unlock_bh(&htt->rx_ring.lock);
2036                 return -EIO;
2037         }
2038         ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
2039         spin_unlock_bh(&htt->rx_ring.lock);
2040
2041         if (ret < 0) {
2042                 ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
2043                 __skb_queue_purge(&amsdu);
2044                 /* FIXME: It's probably a good idea to reboot the
2045                  * device instead of leaving it inoperable.
2046                  */
2047                 htt->rx_confused = true;
2048                 return ret;
2049         }
2050
2051         num_msdus = skb_queue_len(&amsdu);
2052
2053         ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
2054
2055         /* only for ret = 1 indicates chained msdus */
2056         if (ret > 0)
2057                 ath10k_htt_rx_h_unchain(ar, &amsdu, &drop_cnt, &unchain_cnt);
2058
2059         ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
2060         ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err);
2061         msdus_to_queue = skb_queue_len(&amsdu);
2062         ath10k_htt_rx_h_enqueue(ar, &amsdu, rx_status);
2063
2064         ath10k_sta_update_rx_tid_stats(ar, first_hdr, num_msdus, err,
2065                                        unchain_cnt, drop_cnt, drop_cnt_filter,
2066                                        msdus_to_queue);
2067
2068         return 0;
2069 }
2070
2071 static void ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc *rx_desc,
2072                                           union htt_rx_pn_t *pn,
2073                                           int pn_len_bits)
2074 {
2075         switch (pn_len_bits) {
2076         case 48:
2077                 pn->pn48 = __le32_to_cpu(rx_desc->pn_31_0) +
2078                            ((u64)(__le32_to_cpu(rx_desc->u0.pn_63_32) & 0xFFFF) << 32);
2079                 break;
2080         case 24:
2081                 pn->pn24 = __le32_to_cpu(rx_desc->pn_31_0);
2082                 break;
2083         }
2084 }
2085
2086 static bool ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t *new_pn,
2087                                    union htt_rx_pn_t *old_pn)
2088 {
2089         return ((new_pn->pn48 & 0xffffffffffffULL) <=
2090                 (old_pn->pn48 & 0xffffffffffffULL));
2091 }
2092
2093 static bool ath10k_htt_rx_pn_check_replay_hl(struct ath10k *ar,
2094                                              struct ath10k_peer *peer,
2095                                              struct htt_rx_indication_hl *rx)
2096 {
2097         bool last_pn_valid, pn_invalid = false;
2098         enum htt_txrx_sec_cast_type sec_index;
2099         enum htt_security_types sec_type;
2100         union htt_rx_pn_t new_pn = {0};
2101         struct htt_hl_rx_desc *rx_desc;
2102         union htt_rx_pn_t *last_pn;
2103         u32 rx_desc_info, tid;
2104         int num_mpdu_ranges;
2105
2106         lockdep_assert_held(&ar->data_lock);
2107
2108         if (!peer)
2109                 return false;
2110
2111         if (!(rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU))
2112                 return false;
2113
2114         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2115                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2116
2117         rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2118         rx_desc_info = __le32_to_cpu(rx_desc->info);
2119
2120         if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED))
2121                 return false;
2122
2123         tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2124         last_pn_valid = peer->tids_last_pn_valid[tid];
2125         last_pn = &peer->tids_last_pn[tid];
2126
2127         if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2128                 sec_index = HTT_TXRX_SEC_MCAST;
2129         else
2130                 sec_index = HTT_TXRX_SEC_UCAST;
2131
2132         sec_type = peer->rx_pn[sec_index].sec_type;
2133         ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2134
2135         if (sec_type != HTT_SECURITY_AES_CCMP &&
2136             sec_type != HTT_SECURITY_TKIP &&
2137             sec_type != HTT_SECURITY_TKIP_NOMIC)
2138                 return false;
2139
2140         if (last_pn_valid)
2141                 pn_invalid = ath10k_htt_rx_pn_cmp48(&new_pn, last_pn);
2142         else
2143                 peer->tids_last_pn_valid[tid] = true;
2144
2145         if (!pn_invalid)
2146                 last_pn->pn48 = new_pn.pn48;
2147
2148         return pn_invalid;
2149 }
2150
2151 static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
2152                                          struct htt_rx_indication_hl *rx,
2153                                          struct sk_buff *skb,
2154                                          enum htt_rx_pn_check_type check_pn_type,
2155                                          enum htt_rx_tkip_demic_type tkip_mic_type)
2156 {
2157         struct ath10k *ar = htt->ar;
2158         struct ath10k_peer *peer;
2159         struct htt_rx_indication_mpdu_range *mpdu_ranges;
2160         struct fw_rx_desc_hl *fw_desc;
2161         enum htt_txrx_sec_cast_type sec_index;
2162         enum htt_security_types sec_type;
2163         union htt_rx_pn_t new_pn = {0};
2164         struct htt_hl_rx_desc *rx_desc;
2165         struct ieee80211_hdr *hdr;
2166         struct ieee80211_rx_status *rx_status;
2167         u16 peer_id;
2168         u8 rx_desc_len;
2169         int num_mpdu_ranges;
2170         size_t tot_hdr_len;
2171         struct ieee80211_channel *ch;
2172         bool pn_invalid, qos, first_msdu;
2173         u32 tid, rx_desc_info;
2174
2175         peer_id = __le16_to_cpu(rx->hdr.peer_id);
2176         tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2177
2178         spin_lock_bh(&ar->data_lock);
2179         peer = ath10k_peer_find_by_id(ar, peer_id);
2180         spin_unlock_bh(&ar->data_lock);
2181         if (!peer && peer_id != HTT_INVALID_PEERID)
2182                 ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
2183
2184         if (!peer)
2185                 return true;
2186
2187         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2188                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2189         mpdu_ranges = htt_rx_ind_get_mpdu_ranges_hl(rx);
2190         fw_desc = &rx->fw_desc;
2191         rx_desc_len = fw_desc->len;
2192
2193         /* I have not yet seen any case where num_mpdu_ranges > 1.
2194          * qcacld does not seem handle that case either, so we introduce the
2195          * same limitiation here as well.
2196          */
2197         if (num_mpdu_ranges > 1)
2198                 ath10k_warn(ar,
2199                             "Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
2200                             num_mpdu_ranges);
2201
2202         if (mpdu_ranges->mpdu_range_status !=
2203             HTT_RX_IND_MPDU_STATUS_OK &&
2204             mpdu_ranges->mpdu_range_status !=
2205             HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) {
2206                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt mpdu_range_status %d\n",
2207                            mpdu_ranges->mpdu_range_status);
2208                 goto err;
2209         }
2210
2211         rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2212         rx_desc_info = __le32_to_cpu(rx_desc->info);
2213
2214         if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2215                 sec_index = HTT_TXRX_SEC_MCAST;
2216         else
2217                 sec_index = HTT_TXRX_SEC_UCAST;
2218
2219         sec_type = peer->rx_pn[sec_index].sec_type;
2220         first_msdu = rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU;
2221
2222         ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2223
2224         if (check_pn_type == HTT_RX_PN_CHECK && tid >= IEEE80211_NUM_TIDS) {
2225                 spin_lock_bh(&ar->data_lock);
2226                 pn_invalid = ath10k_htt_rx_pn_check_replay_hl(ar, peer, rx);
2227                 spin_unlock_bh(&ar->data_lock);
2228
2229                 if (pn_invalid)
2230                         goto err;
2231         }
2232
2233         /* Strip off all headers before the MAC header before delivery to
2234          * mac80211
2235          */
2236         tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
2237                       sizeof(rx->ppdu) + sizeof(rx->prefix) +
2238                       sizeof(rx->fw_desc) +
2239                       sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
2240
2241         skb_pull(skb, tot_hdr_len);
2242
2243         hdr = (struct ieee80211_hdr *)skb->data;
2244         qos = ieee80211_is_data_qos(hdr->frame_control);
2245
2246         rx_status = IEEE80211_SKB_RXCB(skb);
2247         memset(rx_status, 0, sizeof(*rx_status));
2248
2249         if (rx->ppdu.combined_rssi == 0) {
2250                 /* SDIO firmware does not provide signal */
2251                 rx_status->signal = 0;
2252                 rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2253         } else {
2254                 rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
2255                         rx->ppdu.combined_rssi;
2256                 rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
2257         }
2258
2259         spin_lock_bh(&ar->data_lock);
2260         ch = ar->scan_channel;
2261         if (!ch)
2262                 ch = ar->rx_channel;
2263         if (!ch)
2264                 ch = ath10k_htt_rx_h_any_channel(ar);
2265         if (!ch)
2266                 ch = ar->tgt_oper_chan;
2267         spin_unlock_bh(&ar->data_lock);
2268
2269         if (ch) {
2270                 rx_status->band = ch->band;
2271                 rx_status->freq = ch->center_freq;
2272         }
2273         if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
2274                 rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
2275         else
2276                 rx_status->flag |= RX_FLAG_AMSDU_MORE;
2277
2278         /* Not entirely sure about this, but all frames from the chipset has
2279          * the protected flag set even though they have already been decrypted.
2280          * Unmasking this flag is necessary in order for mac80211 not to drop
2281          * the frame.
2282          * TODO: Verify this is always the case or find out a way to check
2283          * if there has been hw decryption.
2284          */
2285         if (ieee80211_has_protected(hdr->frame_control)) {
2286                 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2287                 rx_status->flag |= RX_FLAG_DECRYPTED |
2288                                    RX_FLAG_IV_STRIPPED |
2289                                    RX_FLAG_MMIC_STRIPPED;
2290
2291                 if (tid < IEEE80211_NUM_TIDS &&
2292                     first_msdu &&
2293                     check_pn_type == HTT_RX_PN_CHECK &&
2294                    (sec_type == HTT_SECURITY_AES_CCMP ||
2295                     sec_type == HTT_SECURITY_TKIP ||
2296                     sec_type == HTT_SECURITY_TKIP_NOMIC)) {
2297                         u8 offset, *ivp, i;
2298                         s8 keyidx = 0;
2299                         __le64 pn48 = cpu_to_le64(new_pn.pn48);
2300
2301                         hdr = (struct ieee80211_hdr *)skb->data;
2302                         offset = ieee80211_hdrlen(hdr->frame_control);
2303                         hdr->frame_control |= __cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2304                         rx_status->flag &= ~RX_FLAG_IV_STRIPPED;
2305
2306                         memmove(skb->data - IEEE80211_CCMP_HDR_LEN,
2307                                 skb->data, offset);
2308                         skb_push(skb, IEEE80211_CCMP_HDR_LEN);
2309                         ivp = skb->data + offset;
2310                         memset(skb->data + offset, 0, IEEE80211_CCMP_HDR_LEN);
2311                         /* Ext IV */
2312                         ivp[IEEE80211_WEP_IV_LEN - 1] |= ATH10K_IEEE80211_EXTIV;
2313
2314                         for (i = 0; i < ARRAY_SIZE(peer->keys); i++) {
2315                                 if (peer->keys[i] &&
2316                                     peer->keys[i]->flags & IEEE80211_KEY_FLAG_PAIRWISE)
2317                                         keyidx = peer->keys[i]->keyidx;
2318                         }
2319
2320                         /* Key ID */
2321                         ivp[IEEE80211_WEP_IV_LEN - 1] |= keyidx << 6;
2322
2323                         if (sec_type == HTT_SECURITY_AES_CCMP) {
2324                                 rx_status->flag |= RX_FLAG_MIC_STRIPPED;
2325                                 /* pn 0, pn 1 */
2326                                 memcpy(skb->data + offset, &pn48, 2);
2327                                 /* pn 1, pn 3 , pn 34 , pn 5 */
2328                                 memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2329                         } else {
2330                                 rx_status->flag |= RX_FLAG_ICV_STRIPPED;
2331                                 /* TSC 0 */
2332                                 memcpy(skb->data + offset + 2, &pn48, 1);
2333                                 /* TSC 1 */
2334                                 memcpy(skb->data + offset, ((u8 *)&pn48) + 1, 1);
2335                                 /* TSC 2 , TSC 3 , TSC 4 , TSC 5*/
2336                                 memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2337                         }
2338                 }
2339         }
2340
2341         if (tkip_mic_type == HTT_RX_TKIP_MIC)
2342                 rx_status->flag &= ~RX_FLAG_IV_STRIPPED &
2343                                    ~RX_FLAG_MMIC_STRIPPED;
2344
2345         if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
2346                 rx_status->flag |= RX_FLAG_MMIC_ERROR;
2347
2348         if (!qos && tid < IEEE80211_NUM_TIDS) {
2349                 u8 offset;
2350                 __le16 qos_ctrl = 0;
2351
2352                 hdr = (struct ieee80211_hdr *)skb->data;
2353                 offset = ieee80211_hdrlen(hdr->frame_control);
2354
2355                 hdr->frame_control |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2356                 memmove(skb->data - IEEE80211_QOS_CTL_LEN, skb->data, offset);
2357                 skb_push(skb, IEEE80211_QOS_CTL_LEN);
2358                 qos_ctrl = cpu_to_le16(tid);
2359                 memcpy(skb->data + offset, &qos_ctrl, IEEE80211_QOS_CTL_LEN);
2360         }
2361
2362         if (ar->napi.dev)
2363                 ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
2364         else
2365                 ieee80211_rx_ni(ar->hw, skb);
2366
2367         /* We have delivered the skb to the upper layers (mac80211) so we
2368          * must not free it.
2369          */
2370         return false;
2371 err:
2372         /* Tell the caller that it must free the skb since we have not
2373          * consumed it
2374          */
2375         return true;
2376 }
2377
2378 static int ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff *skb,
2379                                                u16 head_len,
2380                                                u16 hdr_len)
2381 {
2382         u8 *ivp, *orig_hdr;
2383
2384         orig_hdr = skb->data;
2385         ivp = orig_hdr + hdr_len + head_len;
2386
2387         /* the ExtIV bit is always set to 1 for TKIP */
2388         if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2389                 return -EINVAL;
2390
2391         memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2392         skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2393         skb_trim(skb, skb->len - ATH10K_IEEE80211_TKIP_MICLEN);
2394         return 0;
2395 }
2396
2397 static int ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff *skb,
2398                                                  u16 head_len,
2399                                                  u16 hdr_len)
2400 {
2401         u8 *ivp, *orig_hdr;
2402
2403         orig_hdr = skb->data;
2404         ivp = orig_hdr + hdr_len + head_len;
2405
2406         /* the ExtIV bit is always set to 1 for TKIP */
2407         if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2408                 return -EINVAL;
2409
2410         memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2411         skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2412         skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
2413         return 0;
2414 }
2415
2416 static int ath10k_htt_rx_frag_ccmp_decap(struct sk_buff *skb,
2417                                          u16 head_len,
2418                                          u16 hdr_len)
2419 {
2420         u8 *ivp, *orig_hdr;
2421
2422         orig_hdr = skb->data;
2423         ivp = orig_hdr + hdr_len + head_len;
2424
2425         /* the ExtIV bit is always set to 1 for CCMP */
2426         if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2427                 return -EINVAL;
2428
2429         skb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN);
2430         memmove(orig_hdr + IEEE80211_CCMP_HDR_LEN, orig_hdr, head_len + hdr_len);
2431         skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
2432         return 0;
2433 }
2434
2435 static int ath10k_htt_rx_frag_wep_decap(struct sk_buff *skb,
2436                                         u16 head_len,
2437                                         u16 hdr_len)
2438 {
2439         u8 *orig_hdr;
2440
2441         orig_hdr = skb->data;
2442
2443         memmove(orig_hdr + IEEE80211_WEP_IV_LEN,
2444                 orig_hdr, head_len + hdr_len);
2445         skb_pull(skb, IEEE80211_WEP_IV_LEN);
2446         skb_trim(skb, skb->len - IEEE80211_WEP_ICV_LEN);
2447         return 0;
2448 }
2449
2450 static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
2451                                               struct htt_rx_fragment_indication *rx,
2452                                               struct sk_buff *skb)
2453 {
2454         struct ath10k *ar = htt->ar;
2455         enum htt_rx_tkip_demic_type tkip_mic = HTT_RX_NON_TKIP_MIC;
2456         enum htt_txrx_sec_cast_type sec_index;
2457         struct htt_rx_indication_hl *rx_hl;
2458         enum htt_security_types sec_type;
2459         u32 tid, frag, seq, rx_desc_info;
2460         union htt_rx_pn_t new_pn = {0};
2461         struct htt_hl_rx_desc *rx_desc;
2462         u16 peer_id, sc, hdr_space;
2463         union htt_rx_pn_t *last_pn;
2464         struct ieee80211_hdr *hdr;
2465         int ret, num_mpdu_ranges;
2466         struct ath10k_peer *peer;
2467         struct htt_resp *resp;
2468         size_t tot_hdr_len;
2469
2470         resp = (struct htt_resp *)(skb->data + HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2471         skb_pull(skb, HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2472         skb_trim(skb, skb->len - FCS_LEN);
2473
2474         peer_id = __le16_to_cpu(rx->peer_id);
2475         rx_hl = (struct htt_rx_indication_hl *)(&resp->rx_ind_hl);
2476
2477         spin_lock_bh(&ar->data_lock);
2478         peer = ath10k_peer_find_by_id(ar, peer_id);
2479         if (!peer) {
2480                 ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer: %u\n", peer_id);
2481                 goto err;
2482         }
2483
2484         num_mpdu_ranges = MS(__le32_to_cpu(rx_hl->hdr.info1),
2485                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2486
2487         tot_hdr_len = sizeof(struct htt_resp_hdr) +
2488                       sizeof(rx_hl->hdr) +
2489                       sizeof(rx_hl->ppdu) +
2490                       sizeof(rx_hl->prefix) +
2491                       sizeof(rx_hl->fw_desc) +
2492                       sizeof(struct htt_rx_indication_mpdu_range) * num_mpdu_ranges;
2493
2494         tid =  MS(rx_hl->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2495         rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
2496         rx_desc_info = __le32_to_cpu(rx_desc->info);
2497
2498         if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
2499                 spin_unlock_bh(&ar->data_lock);
2500                 return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2501                                                     HTT_RX_NON_PN_CHECK,
2502                                                     HTT_RX_NON_TKIP_MIC);
2503         }
2504
2505         hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
2506
2507         if (ieee80211_has_retry(hdr->frame_control))
2508                 goto err;
2509
2510         hdr_space = ieee80211_hdrlen(hdr->frame_control);
2511         sc = __le16_to_cpu(hdr->seq_ctrl);
2512         seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2513         frag = sc & IEEE80211_SCTL_FRAG;
2514
2515         sec_index = MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST) ?
2516                     HTT_TXRX_SEC_MCAST : HTT_TXRX_SEC_UCAST;
2517         sec_type = peer->rx_pn[sec_index].sec_type;
2518         ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2519
2520         switch (sec_type) {
2521         case HTT_SECURITY_TKIP:
2522                 tkip_mic = HTT_RX_TKIP_MIC;
2523                 ret = ath10k_htt_rx_frag_tkip_decap_withmic(skb,
2524                                                             tot_hdr_len +
2525                                                             rx_hl->fw_desc.len,
2526                                                             hdr_space);
2527                 if (ret)
2528                         goto err;
2529                 break;
2530         case HTT_SECURITY_TKIP_NOMIC:
2531                 ret = ath10k_htt_rx_frag_tkip_decap_nomic(skb,
2532                                                           tot_hdr_len +
2533                                                           rx_hl->fw_desc.len,
2534                                                           hdr_space);
2535                 if (ret)
2536                         goto err;
2537                 break;
2538         case HTT_SECURITY_AES_CCMP:
2539                 ret = ath10k_htt_rx_frag_ccmp_decap(skb,
2540                                                     tot_hdr_len + rx_hl->fw_desc.len,
2541                                                     hdr_space);
2542                 if (ret)
2543                         goto err;
2544                 break;
2545         case HTT_SECURITY_WEP128:
2546         case HTT_SECURITY_WEP104:
2547         case HTT_SECURITY_WEP40:
2548                 ret = ath10k_htt_rx_frag_wep_decap(skb,
2549                                                    tot_hdr_len + rx_hl->fw_desc.len,
2550                                                    hdr_space);
2551                 if (ret)
2552                         goto err;
2553                 break;
2554         default:
2555                 break;
2556         }
2557
2558         resp = (struct htt_resp *)(skb->data);
2559
2560         if (sec_type != HTT_SECURITY_AES_CCMP &&
2561             sec_type != HTT_SECURITY_TKIP &&
2562             sec_type != HTT_SECURITY_TKIP_NOMIC) {
2563                 spin_unlock_bh(&ar->data_lock);
2564                 return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2565                                                     HTT_RX_NON_PN_CHECK,
2566                                                     HTT_RX_NON_TKIP_MIC);
2567         }
2568
2569         last_pn = &peer->frag_tids_last_pn[tid];
2570
2571         if (frag == 0) {
2572                 if (ath10k_htt_rx_pn_check_replay_hl(ar, peer, &resp->rx_ind_hl))
2573                         goto err;
2574
2575                 last_pn->pn48 = new_pn.pn48;
2576                 peer->frag_tids_seq[tid] = seq;
2577         } else if (sec_type == HTT_SECURITY_AES_CCMP) {
2578                 if (seq != peer->frag_tids_seq[tid])
2579                         goto err;
2580
2581                 if (new_pn.pn48 != last_pn->pn48 + 1)
2582                         goto err;
2583
2584                 last_pn->pn48 = new_pn.pn48;
2585                 last_pn = &peer->tids_last_pn[tid];
2586                 last_pn->pn48 = new_pn.pn48;
2587         }
2588
2589         spin_unlock_bh(&ar->data_lock);
2590
2591         return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2592                                             HTT_RX_NON_PN_CHECK, tkip_mic);
2593
2594 err:
2595         spin_unlock_bh(&ar->data_lock);
2596
2597         /* Tell the caller that it must free the skb since we have not
2598          * consumed it
2599          */
2600         return true;
2601 }
2602
2603 static void ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt *htt,
2604                                          struct htt_rx_indication *rx)
2605 {
2606         struct ath10k *ar = htt->ar;
2607         struct htt_rx_indication_mpdu_range *mpdu_ranges;
2608         int num_mpdu_ranges;
2609         int i, mpdu_count = 0;
2610         u16 peer_id;
2611         u8 tid;
2612
2613         num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2614                              HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2615         peer_id = __le16_to_cpu(rx->hdr.peer_id);
2616         tid =  MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2617
2618         mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
2619
2620         ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
2621                         rx, struct_size(rx, mpdu_ranges, num_mpdu_ranges));
2622
2623         for (i = 0; i < num_mpdu_ranges; i++)
2624                 mpdu_count += mpdu_ranges[i].mpdu_count;
2625
2626         atomic_add(mpdu_count, &htt->num_mpdus_ready);
2627
2628         ath10k_sta_update_rx_tid_stats_ampdu(ar, peer_id, tid, mpdu_ranges,
2629                                              num_mpdu_ranges);
2630 }
2631
2632 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
2633                                        struct sk_buff *skb)
2634 {
2635         struct ath10k_htt *htt = &ar->htt;
2636         struct htt_resp *resp = (struct htt_resp *)skb->data;
2637         struct htt_tx_done tx_done = {};
2638         int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
2639         __le16 msdu_id, *msdus;
2640         bool rssi_enabled = false;
2641         u8 msdu_count = 0, num_airtime_records, tid;
2642         int i, htt_pad = 0;
2643         struct htt_data_tx_compl_ppdu_dur *ppdu_info;
2644         struct ath10k_peer *peer;
2645         u16 ppdu_info_offset = 0, peer_id;
2646         u32 tx_duration;
2647
2648         switch (status) {
2649         case HTT_DATA_TX_STATUS_NO_ACK:
2650                 tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2651                 break;
2652         case HTT_DATA_TX_STATUS_OK:
2653                 tx_done.status = HTT_TX_COMPL_STATE_ACK;
2654                 break;
2655         case HTT_DATA_TX_STATUS_DISCARD:
2656         case HTT_DATA_TX_STATUS_POSTPONE:
2657         case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
2658                 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2659                 break;
2660         default:
2661                 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
2662                 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2663                 break;
2664         }
2665
2666         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
2667                    resp->data_tx_completion.num_msdus);
2668
2669         msdu_count = resp->data_tx_completion.num_msdus;
2670         msdus = resp->data_tx_completion.msdus;
2671         rssi_enabled = ath10k_is_rssi_enable(&ar->hw_params, resp);
2672
2673         if (rssi_enabled)
2674                 htt_pad = ath10k_tx_data_rssi_get_pad_bytes(&ar->hw_params,
2675                                                             resp);
2676
2677         for (i = 0; i < msdu_count; i++) {
2678                 msdu_id = msdus[i];
2679                 tx_done.msdu_id = __le16_to_cpu(msdu_id);
2680
2681                 if (rssi_enabled) {
2682                         /* Total no of MSDUs should be even,
2683                          * if odd MSDUs are sent firmware fills
2684                          * last msdu id with 0xffff
2685                          */
2686                         if (msdu_count & 0x01) {
2687                                 msdu_id = msdus[msdu_count +  i + 1 + htt_pad];
2688                                 tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2689                         } else {
2690                                 msdu_id = msdus[msdu_count +  i + htt_pad];
2691                                 tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2692                         }
2693                 }
2694
2695                 /* kfifo_put: In practice firmware shouldn't fire off per-CE
2696                  * interrupt and main interrupt (MSI/-X range case) for the same
2697                  * HTC service so it should be safe to use kfifo_put w/o lock.
2698                  *
2699                  * From kfifo_put() documentation:
2700                  *  Note that with only one concurrent reader and one concurrent
2701                  *  writer, you don't need extra locking to use these macro.
2702                  */
2703                 if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
2704                         ath10k_txrx_tx_unref(htt, &tx_done);
2705                 } else if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
2706                         ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
2707                                     tx_done.msdu_id, tx_done.status);
2708                         ath10k_txrx_tx_unref(htt, &tx_done);
2709                 }
2710         }
2711
2712         if (!(resp->data_tx_completion.flags2 & HTT_TX_CMPL_FLAG_PPDU_DURATION_PRESENT))
2713                 return;
2714
2715         ppdu_info_offset = (msdu_count & 0x01) ? msdu_count + 1 : msdu_count;
2716
2717         if (rssi_enabled)
2718                 ppdu_info_offset += ppdu_info_offset;
2719
2720         if (resp->data_tx_completion.flags2 &
2721             (HTT_TX_CMPL_FLAG_PPID_PRESENT | HTT_TX_CMPL_FLAG_PA_PRESENT))
2722                 ppdu_info_offset += 2;
2723
2724         ppdu_info = (struct htt_data_tx_compl_ppdu_dur *)&msdus[ppdu_info_offset];
2725         num_airtime_records = FIELD_GET(HTT_TX_COMPL_PPDU_DUR_INFO0_NUM_ENTRIES_MASK,
2726                                         __le32_to_cpu(ppdu_info->info0));
2727
2728         for (i = 0; i < num_airtime_records; i++) {
2729                 struct htt_data_tx_ppdu_dur *ppdu_dur;
2730                 u32 info0;
2731
2732                 ppdu_dur = &ppdu_info->ppdu_dur[i];
2733                 info0 = __le32_to_cpu(ppdu_dur->info0);
2734
2735                 peer_id = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_PEER_ID_MASK,
2736                                     info0);
2737                 rcu_read_lock();
2738                 spin_lock_bh(&ar->data_lock);
2739
2740                 peer = ath10k_peer_find_by_id(ar, peer_id);
2741                 if (!peer || !peer->sta) {
2742                         spin_unlock_bh(&ar->data_lock);
2743                         rcu_read_unlock();
2744                         continue;
2745                 }
2746
2747                 tid = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_TID_MASK, info0);
2748                 tx_duration = __le32_to_cpu(ppdu_dur->tx_duration);
2749
2750                 ieee80211_sta_register_airtime(peer->sta, tid, tx_duration, 0);
2751
2752                 spin_unlock_bh(&ar->data_lock);
2753                 rcu_read_unlock();
2754         }
2755 }
2756
2757 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
2758 {
2759         struct htt_rx_addba *ev = &resp->rx_addba;
2760         struct ath10k_peer *peer;
2761         struct ath10k_vif *arvif;
2762         u16 info0, tid, peer_id;
2763
2764         info0 = __le16_to_cpu(ev->info0);
2765         tid = MS(info0, HTT_RX_BA_INFO0_TID);
2766         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
2767
2768         ath10k_dbg(ar, ATH10K_DBG_HTT,
2769                    "htt rx addba tid %hu peer_id %hu size %hhu\n",
2770                    tid, peer_id, ev->window_size);
2771
2772         spin_lock_bh(&ar->data_lock);
2773         peer = ath10k_peer_find_by_id(ar, peer_id);
2774         if (!peer) {
2775                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
2776                             peer_id);
2777                 spin_unlock_bh(&ar->data_lock);
2778                 return;
2779         }
2780
2781         arvif = ath10k_get_arvif(ar, peer->vdev_id);
2782         if (!arvif) {
2783                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
2784                             peer->vdev_id);
2785                 spin_unlock_bh(&ar->data_lock);
2786                 return;
2787         }
2788
2789         ath10k_dbg(ar, ATH10K_DBG_HTT,
2790                    "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
2791                    peer->addr, tid, ev->window_size);
2792
2793         ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
2794         spin_unlock_bh(&ar->data_lock);
2795 }
2796
2797 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
2798 {
2799         struct htt_rx_delba *ev = &resp->rx_delba;
2800         struct ath10k_peer *peer;
2801         struct ath10k_vif *arvif;
2802         u16 info0, tid, peer_id;
2803
2804         info0 = __le16_to_cpu(ev->info0);
2805         tid = MS(info0, HTT_RX_BA_INFO0_TID);
2806         peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
2807
2808         ath10k_dbg(ar, ATH10K_DBG_HTT,
2809                    "htt rx delba tid %hu peer_id %hu\n",
2810                    tid, peer_id);
2811
2812         spin_lock_bh(&ar->data_lock);
2813         peer = ath10k_peer_find_by_id(ar, peer_id);
2814         if (!peer) {
2815                 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
2816                             peer_id);
2817                 spin_unlock_bh(&ar->data_lock);
2818                 return;
2819         }
2820
2821         arvif = ath10k_get_arvif(ar, peer->vdev_id);
2822         if (!arvif) {
2823                 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
2824                             peer->vdev_id);
2825                 spin_unlock_bh(&ar->data_lock);
2826                 return;
2827         }
2828
2829         ath10k_dbg(ar, ATH10K_DBG_HTT,
2830                    "htt rx stop rx ba session sta %pM tid %hu\n",
2831                    peer->addr, tid);
2832
2833         ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
2834         spin_unlock_bh(&ar->data_lock);
2835 }
2836
2837 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
2838                                        struct sk_buff_head *amsdu)
2839 {
2840         struct sk_buff *msdu;
2841         struct htt_rx_desc *rxd;
2842
2843         if (skb_queue_empty(list))
2844                 return -ENOBUFS;
2845
2846         if (WARN_ON(!skb_queue_empty(amsdu)))
2847                 return -EINVAL;
2848
2849         while ((msdu = __skb_dequeue(list))) {
2850                 __skb_queue_tail(amsdu, msdu);
2851
2852                 rxd = (void *)msdu->data - sizeof(*rxd);
2853                 if (rxd->msdu_end.common.info0 &
2854                     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
2855                         break;
2856         }
2857
2858         msdu = skb_peek_tail(amsdu);
2859         rxd = (void *)msdu->data - sizeof(*rxd);
2860         if (!(rxd->msdu_end.common.info0 &
2861               __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
2862                 skb_queue_splice_init(amsdu, list);
2863                 return -EAGAIN;
2864         }
2865
2866         return 0;
2867 }
2868
2869 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
2870                                             struct sk_buff *skb)
2871 {
2872         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2873
2874         if (!ieee80211_has_protected(hdr->frame_control))
2875                 return;
2876
2877         /* Offloaded frames are already decrypted but firmware insists they are
2878          * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
2879          * will drop the frame.
2880          */
2881
2882         hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2883         status->flag |= RX_FLAG_DECRYPTED |
2884                         RX_FLAG_IV_STRIPPED |
2885                         RX_FLAG_MMIC_STRIPPED;
2886 }
2887
2888 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
2889                                        struct sk_buff_head *list)
2890 {
2891         struct ath10k_htt *htt = &ar->htt;
2892         struct ieee80211_rx_status *status = &htt->rx_status;
2893         struct htt_rx_offload_msdu *rx;
2894         struct sk_buff *msdu;
2895         size_t offset;
2896
2897         while ((msdu = __skb_dequeue(list))) {
2898                 /* Offloaded frames don't have Rx descriptor. Instead they have
2899                  * a short meta information header.
2900                  */
2901
2902                 rx = (void *)msdu->data;
2903
2904                 skb_put(msdu, sizeof(*rx));
2905                 skb_pull(msdu, sizeof(*rx));
2906
2907                 if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
2908                         ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
2909                         dev_kfree_skb_any(msdu);
2910                         continue;
2911                 }
2912
2913                 skb_put(msdu, __le16_to_cpu(rx->msdu_len));
2914
2915                 /* Offloaded rx header length isn't multiple of 2 nor 4 so the
2916                  * actual payload is unaligned. Align the frame.  Otherwise
2917                  * mac80211 complains.  This shouldn't reduce performance much
2918                  * because these offloaded frames are rare.
2919                  */
2920                 offset = 4 - ((unsigned long)msdu->data & 3);
2921                 skb_put(msdu, offset);
2922                 memmove(msdu->data + offset, msdu->data, msdu->len);
2923                 skb_pull(msdu, offset);
2924
2925                 /* FIXME: The frame is NWifi. Re-construct QoS Control
2926                  * if possible later.
2927                  */
2928
2929                 memset(status, 0, sizeof(*status));
2930                 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2931
2932                 ath10k_htt_rx_h_rx_offload_prot(status, msdu);
2933                 ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
2934                 ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
2935         }
2936 }
2937
2938 static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
2939 {
2940         struct ath10k_htt *htt = &ar->htt;
2941         struct htt_resp *resp = (void *)skb->data;
2942         struct ieee80211_rx_status *status = &htt->rx_status;
2943         struct sk_buff_head list;
2944         struct sk_buff_head amsdu;
2945         u16 peer_id;
2946         u16 msdu_count;
2947         u8 vdev_id;
2948         u8 tid;
2949         bool offload;
2950         bool frag;
2951         int ret;
2952
2953         lockdep_assert_held(&htt->rx_ring.lock);
2954
2955         if (htt->rx_confused)
2956                 return -EIO;
2957
2958         skb_pull(skb, sizeof(resp->hdr));
2959         skb_pull(skb, sizeof(resp->rx_in_ord_ind));
2960
2961         peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
2962         msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
2963         vdev_id = resp->rx_in_ord_ind.vdev_id;
2964         tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
2965         offload = !!(resp->rx_in_ord_ind.info &
2966                         HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
2967         frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
2968
2969         ath10k_dbg(ar, ATH10K_DBG_HTT,
2970                    "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
2971                    vdev_id, peer_id, tid, offload, frag, msdu_count);
2972
2973         if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs32)) {
2974                 ath10k_warn(ar, "dropping invalid in order rx indication\n");
2975                 return -EINVAL;
2976         }
2977
2978         /* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
2979          * extracted and processed.
2980          */
2981         __skb_queue_head_init(&list);
2982         if (ar->hw_params.target_64bit)
2983                 ret = ath10k_htt_rx_pop_paddr64_list(htt, &resp->rx_in_ord_ind,
2984                                                      &list);
2985         else
2986                 ret = ath10k_htt_rx_pop_paddr32_list(htt, &resp->rx_in_ord_ind,
2987                                                      &list);
2988
2989         if (ret < 0) {
2990                 ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
2991                 htt->rx_confused = true;
2992                 return -EIO;
2993         }
2994
2995         /* Offloaded frames are very different and need to be handled
2996          * separately.
2997          */
2998         if (offload)
2999                 ath10k_htt_rx_h_rx_offload(ar, &list);
3000
3001         while (!skb_queue_empty(&list)) {
3002                 __skb_queue_head_init(&amsdu);
3003                 ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
3004                 switch (ret) {
3005                 case 0:
3006                         /* Note: The in-order indication may report interleaved
3007                          * frames from different PPDUs meaning reported rx rate
3008                          * to mac80211 isn't accurate/reliable. It's still
3009                          * better to report something than nothing though. This
3010                          * should still give an idea about rx rate to the user.
3011                          */
3012                         ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
3013                         ath10k_htt_rx_h_filter(ar, &amsdu, status, NULL);
3014                         ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false, NULL,
3015                                              NULL);
3016                         ath10k_htt_rx_h_enqueue(ar, &amsdu, status);
3017                         break;
3018                 case -EAGAIN:
3019                         /* fall through */
3020                 default:
3021                         /* Should not happen. */
3022                         ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
3023                         htt->rx_confused = true;
3024                         __skb_queue_purge(&list);
3025                         return -EIO;
3026                 }
3027         }
3028         return ret;
3029 }
3030
3031 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
3032                                                    const __le32 *resp_ids,
3033                                                    int num_resp_ids)
3034 {
3035         int i;
3036         u32 resp_id;
3037
3038         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
3039                    num_resp_ids);
3040
3041         for (i = 0; i < num_resp_ids; i++) {
3042                 resp_id = le32_to_cpu(resp_ids[i]);
3043
3044                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
3045                            resp_id);
3046
3047                 /* TODO: free resp_id */
3048         }
3049 }
3050
3051 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
3052 {
3053         struct ieee80211_hw *hw = ar->hw;
3054         struct ieee80211_txq *txq;
3055         struct htt_resp *resp = (struct htt_resp *)skb->data;
3056         struct htt_tx_fetch_record *record;
3057         size_t len;
3058         size_t max_num_bytes;
3059         size_t max_num_msdus;
3060         size_t num_bytes;
3061         size_t num_msdus;
3062         const __le32 *resp_ids;
3063         u16 num_records;
3064         u16 num_resp_ids;
3065         u16 peer_id;
3066         u8 tid;
3067         int ret;
3068         int i;
3069         bool may_tx;
3070
3071         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
3072
3073         len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
3074         if (unlikely(skb->len < len)) {
3075                 ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
3076                 return;
3077         }
3078
3079         num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
3080         num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
3081
3082         len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
3083         len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
3084
3085         if (unlikely(skb->len < len)) {
3086                 ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
3087                 return;
3088         }
3089
3090         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %hu num resps %hu seq %hu\n",
3091                    num_records, num_resp_ids,
3092                    le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
3093
3094         if (!ar->htt.tx_q_state.enabled) {
3095                 ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
3096                 return;
3097         }
3098
3099         if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
3100                 ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
3101                 return;
3102         }
3103
3104         rcu_read_lock();
3105
3106         for (i = 0; i < num_records; i++) {
3107                 record = &resp->tx_fetch_ind.records[i];
3108                 peer_id = MS(le16_to_cpu(record->info),
3109                              HTT_TX_FETCH_RECORD_INFO_PEER_ID);
3110                 tid = MS(le16_to_cpu(record->info),
3111                          HTT_TX_FETCH_RECORD_INFO_TID);
3112                 max_num_msdus = le16_to_cpu(record->num_msdus);
3113                 max_num_bytes = le32_to_cpu(record->num_bytes);
3114
3115                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %hu tid %hhu msdus %zu bytes %zu\n",
3116                            i, peer_id, tid, max_num_msdus, max_num_bytes);
3117
3118                 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3119                     unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3120                         ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
3121                                     peer_id, tid);
3122                         continue;
3123                 }
3124
3125                 spin_lock_bh(&ar->data_lock);
3126                 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3127                 spin_unlock_bh(&ar->data_lock);
3128
3129                 /* It is okay to release the lock and use txq because RCU read
3130                  * lock is held.
3131                  */
3132
3133                 if (unlikely(!txq)) {
3134                         ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
3135                                     peer_id, tid);
3136                         continue;
3137                 }
3138
3139                 num_msdus = 0;
3140                 num_bytes = 0;
3141
3142                 ieee80211_txq_schedule_start(hw, txq->ac);
3143                 may_tx = ieee80211_txq_may_transmit(hw, txq);
3144                 while (num_msdus < max_num_msdus &&
3145                        num_bytes < max_num_bytes) {
3146                         if (!may_tx)
3147                                 break;
3148
3149                         ret = ath10k_mac_tx_push_txq(hw, txq);
3150                         if (ret < 0)
3151                                 break;
3152
3153                         num_msdus++;
3154                         num_bytes += ret;
3155                 }
3156                 ieee80211_return_txq(hw, txq, false);
3157                 ieee80211_txq_schedule_end(hw, txq->ac);
3158
3159                 record->num_msdus = cpu_to_le16(num_msdus);
3160                 record->num_bytes = cpu_to_le32(num_bytes);
3161
3162                 ath10k_htt_tx_txq_recalc(hw, txq);
3163         }
3164
3165         rcu_read_unlock();
3166
3167         resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
3168         ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
3169
3170         ret = ath10k_htt_tx_fetch_resp(ar,
3171                                        resp->tx_fetch_ind.token,
3172                                        resp->tx_fetch_ind.fetch_seq_num,
3173                                        resp->tx_fetch_ind.records,
3174                                        num_records);
3175         if (unlikely(ret)) {
3176                 ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
3177                             le32_to_cpu(resp->tx_fetch_ind.token), ret);
3178                 /* FIXME: request fw restart */
3179         }
3180
3181         ath10k_htt_tx_txq_sync(ar);
3182 }
3183
3184 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
3185                                            struct sk_buff *skb)
3186 {
3187         const struct htt_resp *resp = (void *)skb->data;
3188         size_t len;
3189         int num_resp_ids;
3190
3191         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
3192
3193         len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
3194         if (unlikely(skb->len < len)) {
3195                 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
3196                 return;
3197         }
3198
3199         num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
3200         len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
3201
3202         if (unlikely(skb->len < len)) {
3203                 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
3204                 return;
3205         }
3206
3207         ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
3208                                                resp->tx_fetch_confirm.resp_ids,
3209                                                num_resp_ids);
3210 }
3211
3212 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
3213                                              struct sk_buff *skb)
3214 {
3215         const struct htt_resp *resp = (void *)skb->data;
3216         const struct htt_tx_mode_switch_record *record;
3217         struct ieee80211_txq *txq;
3218         struct ath10k_txq *artxq;
3219         size_t len;
3220         size_t num_records;
3221         enum htt_tx_mode_switch_mode mode;
3222         bool enable;
3223         u16 info0;
3224         u16 info1;
3225         u16 threshold;
3226         u16 peer_id;
3227         u8 tid;
3228         int i;
3229
3230         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
3231
3232         len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
3233         if (unlikely(skb->len < len)) {
3234                 ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
3235                 return;
3236         }
3237
3238         info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
3239         info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
3240
3241         enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
3242         num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3243         mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
3244         threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3245
3246         ath10k_dbg(ar, ATH10K_DBG_HTT,
3247                    "htt rx tx mode switch ind info0 0x%04hx info1 0x%04hx enable %d num records %zd mode %d threshold %hu\n",
3248                    info0, info1, enable, num_records, mode, threshold);
3249
3250         len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
3251
3252         if (unlikely(skb->len < len)) {
3253                 ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
3254                 return;
3255         }
3256
3257         switch (mode) {
3258         case HTT_TX_MODE_SWITCH_PUSH:
3259         case HTT_TX_MODE_SWITCH_PUSH_PULL:
3260                 break;
3261         default:
3262                 ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
3263                             mode);
3264                 return;
3265         }
3266
3267         if (!enable)
3268                 return;
3269
3270         ar->htt.tx_q_state.enabled = enable;
3271         ar->htt.tx_q_state.mode = mode;
3272         ar->htt.tx_q_state.num_push_allowed = threshold;
3273
3274         rcu_read_lock();
3275
3276         for (i = 0; i < num_records; i++) {
3277                 record = &resp->tx_mode_switch_ind.records[i];
3278                 info0 = le16_to_cpu(record->info0);
3279                 peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
3280                 tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
3281
3282                 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3283                     unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3284                         ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
3285                                     peer_id, tid);
3286                         continue;
3287                 }
3288
3289                 spin_lock_bh(&ar->data_lock);
3290                 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3291                 spin_unlock_bh(&ar->data_lock);
3292
3293                 /* It is okay to release the lock and use txq because RCU read
3294                  * lock is held.
3295                  */
3296
3297                 if (unlikely(!txq)) {
3298                         ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
3299                                     peer_id, tid);
3300                         continue;
3301                 }
3302
3303                 spin_lock_bh(&ar->htt.tx_lock);
3304                 artxq = (void *)txq->drv_priv;
3305                 artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
3306                 spin_unlock_bh(&ar->htt.tx_lock);
3307         }
3308
3309         rcu_read_unlock();
3310
3311         ath10k_mac_tx_push_pending(ar);
3312 }
3313
3314 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3315 {
3316         bool release;
3317
3318         release = ath10k_htt_t2h_msg_handler(ar, skb);
3319
3320         /* Free the indication buffer */
3321         if (release)
3322                 dev_kfree_skb_any(skb);
3323 }
3324
3325 static inline s8 ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate)
3326 {
3327         static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12,
3328                                           18, 24, 36, 48, 54};
3329         int i;
3330
3331         for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) {
3332                 if (rate == legacy_rates[i])
3333                         return i;
3334         }
3335
3336         ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", rate);
3337         return -EINVAL;
3338 }
3339
3340 static void
3341 ath10k_accumulate_per_peer_tx_stats(struct ath10k *ar,
3342                                     struct ath10k_sta *arsta,
3343                                     struct ath10k_per_peer_tx_stats *pstats,
3344                                     s8 legacy_rate_idx)
3345 {
3346         struct rate_info *txrate = &arsta->txrate;
3347         struct ath10k_htt_tx_stats *tx_stats;
3348         int idx, ht_idx, gi, mcs, bw, nss;
3349         unsigned long flags;
3350
3351         if (!arsta->tx_stats)
3352                 return;
3353
3354         tx_stats = arsta->tx_stats;
3355         flags = txrate->flags;
3356         gi = test_bit(ATH10K_RATE_INFO_FLAGS_SGI_BIT, &flags);
3357         mcs = ATH10K_HW_MCS_RATE(pstats->ratecode);
3358         bw = txrate->bw;
3359         nss = txrate->nss;
3360         ht_idx = mcs + (nss - 1) * 8;
3361         idx = mcs * 8 + 8 * 10 * (nss - 1);
3362         idx += bw * 2 + gi;
3363
3364 #define STATS_OP_FMT(name) tx_stats->stats[ATH10K_STATS_TYPE_##name]
3365
3366         if (txrate->flags & RATE_INFO_FLAGS_VHT_MCS) {
3367                 STATS_OP_FMT(SUCC).vht[0][mcs] += pstats->succ_bytes;
3368                 STATS_OP_FMT(SUCC).vht[1][mcs] += pstats->succ_pkts;
3369                 STATS_OP_FMT(FAIL).vht[0][mcs] += pstats->failed_bytes;
3370                 STATS_OP_FMT(FAIL).vht[1][mcs] += pstats->failed_pkts;
3371                 STATS_OP_FMT(RETRY).vht[0][mcs] += pstats->retry_bytes;
3372                 STATS_OP_FMT(RETRY).vht[1][mcs] += pstats->retry_pkts;
3373         } else if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3374                 STATS_OP_FMT(SUCC).ht[0][ht_idx] += pstats->succ_bytes;
3375                 STATS_OP_FMT(SUCC).ht[1][ht_idx] += pstats->succ_pkts;
3376                 STATS_OP_FMT(FAIL).ht[0][ht_idx] += pstats->failed_bytes;
3377                 STATS_OP_FMT(FAIL).ht[1][ht_idx] += pstats->failed_pkts;
3378                 STATS_OP_FMT(RETRY).ht[0][ht_idx] += pstats->retry_bytes;
3379                 STATS_OP_FMT(RETRY).ht[1][ht_idx] += pstats->retry_pkts;
3380         } else {
3381                 mcs = legacy_rate_idx;
3382
3383                 STATS_OP_FMT(SUCC).legacy[0][mcs] += pstats->succ_bytes;
3384                 STATS_OP_FMT(SUCC).legacy[1][mcs] += pstats->succ_pkts;
3385                 STATS_OP_FMT(FAIL).legacy[0][mcs] += pstats->failed_bytes;
3386                 STATS_OP_FMT(FAIL).legacy[1][mcs] += pstats->failed_pkts;
3387                 STATS_OP_FMT(RETRY).legacy[0][mcs] += pstats->retry_bytes;
3388                 STATS_OP_FMT(RETRY).legacy[1][mcs] += pstats->retry_pkts;
3389         }
3390
3391         if (ATH10K_HW_AMPDU(pstats->flags)) {
3392                 tx_stats->ba_fails += ATH10K_HW_BA_FAIL(pstats->flags);
3393
3394                 if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3395                         STATS_OP_FMT(AMPDU).ht[0][ht_idx] +=
3396                                 pstats->succ_bytes + pstats->retry_bytes;
3397                         STATS_OP_FMT(AMPDU).ht[1][ht_idx] +=
3398                                 pstats->succ_pkts + pstats->retry_pkts;
3399                 } else {
3400                         STATS_OP_FMT(AMPDU).vht[0][mcs] +=
3401                                 pstats->succ_bytes + pstats->retry_bytes;
3402                         STATS_OP_FMT(AMPDU).vht[1][mcs] +=
3403                                 pstats->succ_pkts + pstats->retry_pkts;
3404                 }
3405                 STATS_OP_FMT(AMPDU).bw[0][bw] +=
3406                         pstats->succ_bytes + pstats->retry_bytes;
3407                 STATS_OP_FMT(AMPDU).nss[0][nss - 1] +=
3408                         pstats->succ_bytes + pstats->retry_bytes;
3409                 STATS_OP_FMT(AMPDU).gi[0][gi] +=
3410                         pstats->succ_bytes + pstats->retry_bytes;
3411                 STATS_OP_FMT(AMPDU).rate_table[0][idx] +=
3412                         pstats->succ_bytes + pstats->retry_bytes;
3413                 STATS_OP_FMT(AMPDU).bw[1][bw] +=
3414                         pstats->succ_pkts + pstats->retry_pkts;
3415                 STATS_OP_FMT(AMPDU).nss[1][nss - 1] +=
3416                         pstats->succ_pkts + pstats->retry_pkts;
3417                 STATS_OP_FMT(AMPDU).gi[1][gi] +=
3418                         pstats->succ_pkts + pstats->retry_pkts;
3419                 STATS_OP_FMT(AMPDU).rate_table[1][idx] +=
3420                         pstats->succ_pkts + pstats->retry_pkts;
3421         } else {
3422                 tx_stats->ack_fails +=
3423                                 ATH10K_HW_BA_FAIL(pstats->flags);
3424         }
3425
3426         STATS_OP_FMT(SUCC).bw[0][bw] += pstats->succ_bytes;
3427         STATS_OP_FMT(SUCC).nss[0][nss - 1] += pstats->succ_bytes;
3428         STATS_OP_FMT(SUCC).gi[0][gi] += pstats->succ_bytes;
3429
3430         STATS_OP_FMT(SUCC).bw[1][bw] += pstats->succ_pkts;
3431         STATS_OP_FMT(SUCC).nss[1][nss - 1] += pstats->succ_pkts;
3432         STATS_OP_FMT(SUCC).gi[1][gi] += pstats->succ_pkts;
3433
3434         STATS_OP_FMT(FAIL).bw[0][bw] += pstats->failed_bytes;
3435         STATS_OP_FMT(FAIL).nss[0][nss - 1] += pstats->failed_bytes;
3436         STATS_OP_FMT(FAIL).gi[0][gi] += pstats->failed_bytes;
3437
3438         STATS_OP_FMT(FAIL).bw[1][bw] += pstats->failed_pkts;
3439         STATS_OP_FMT(FAIL).nss[1][nss - 1] += pstats->failed_pkts;
3440         STATS_OP_FMT(FAIL).gi[1][gi] += pstats->failed_pkts;
3441
3442         STATS_OP_FMT(RETRY).bw[0][bw] += pstats->retry_bytes;
3443         STATS_OP_FMT(RETRY).nss[0][nss - 1] += pstats->retry_bytes;
3444         STATS_OP_FMT(RETRY).gi[0][gi] += pstats->retry_bytes;
3445
3446         STATS_OP_FMT(RETRY).bw[1][bw] += pstats->retry_pkts;
3447         STATS_OP_FMT(RETRY).nss[1][nss - 1] += pstats->retry_pkts;
3448         STATS_OP_FMT(RETRY).gi[1][gi] += pstats->retry_pkts;
3449
3450         if (txrate->flags >= RATE_INFO_FLAGS_MCS) {
3451                 STATS_OP_FMT(SUCC).rate_table[0][idx] += pstats->succ_bytes;
3452                 STATS_OP_FMT(SUCC).rate_table[1][idx] += pstats->succ_pkts;
3453                 STATS_OP_FMT(FAIL).rate_table[0][idx] += pstats->failed_bytes;
3454                 STATS_OP_FMT(FAIL).rate_table[1][idx] += pstats->failed_pkts;
3455                 STATS_OP_FMT(RETRY).rate_table[0][idx] += pstats->retry_bytes;
3456                 STATS_OP_FMT(RETRY).rate_table[1][idx] += pstats->retry_pkts;
3457         }
3458
3459         tx_stats->tx_duration += pstats->duration;
3460 }
3461
3462 static void
3463 ath10k_update_per_peer_tx_stats(struct ath10k *ar,
3464                                 struct ieee80211_sta *sta,
3465                                 struct ath10k_per_peer_tx_stats *peer_stats)
3466 {
3467         struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
3468         struct ieee80211_chanctx_conf *conf = NULL;
3469         u8 rate = 0, sgi;
3470         s8 rate_idx = 0;
3471         bool skip_auto_rate;
3472         struct rate_info txrate;
3473
3474         lockdep_assert_held(&ar->data_lock);
3475
3476         txrate.flags = ATH10K_HW_PREAMBLE(peer_stats->ratecode);
3477         txrate.bw = ATH10K_HW_BW(peer_stats->flags);
3478         txrate.nss = ATH10K_HW_NSS(peer_stats->ratecode);
3479         txrate.mcs = ATH10K_HW_MCS_RATE(peer_stats->ratecode);
3480         sgi = ATH10K_HW_GI(peer_stats->flags);
3481         skip_auto_rate = ATH10K_FW_SKIPPED_RATE_CTRL(peer_stats->flags);
3482
3483         /* Firmware's rate control skips broadcast/management frames,
3484          * if host has configure fixed rates and in some other special cases.
3485          */
3486         if (skip_auto_rate)
3487                 return;
3488
3489         if (txrate.flags == WMI_RATE_PREAMBLE_VHT && txrate.mcs > 9) {
3490                 ath10k_warn(ar, "Invalid VHT mcs %hhd peer stats",  txrate.mcs);
3491                 return;
3492         }
3493
3494         if (txrate.flags == WMI_RATE_PREAMBLE_HT &&
3495             (txrate.mcs > 7 || txrate.nss < 1)) {
3496                 ath10k_warn(ar, "Invalid HT mcs %hhd nss %hhd peer stats",
3497                             txrate.mcs, txrate.nss);
3498                 return;
3499         }
3500
3501         memset(&arsta->txrate, 0, sizeof(arsta->txrate));
3502         memset(&arsta->tx_info.status, 0, sizeof(arsta->tx_info.status));
3503         if (txrate.flags == WMI_RATE_PREAMBLE_CCK ||
3504             txrate.flags == WMI_RATE_PREAMBLE_OFDM) {
3505                 rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode);
3506                 /* This is hacky, FW sends CCK rate 5.5Mbps as 6 */
3507                 if (rate == 6 && txrate.flags == WMI_RATE_PREAMBLE_CCK)
3508                         rate = 5;
3509                 rate_idx = ath10k_get_legacy_rate_idx(ar, rate);
3510                 if (rate_idx < 0)
3511                         return;
3512                 arsta->txrate.legacy = rate;
3513         } else if (txrate.flags == WMI_RATE_PREAMBLE_HT) {
3514                 arsta->txrate.flags = RATE_INFO_FLAGS_MCS;
3515                 arsta->txrate.mcs = txrate.mcs + 8 * (txrate.nss - 1);
3516         } else {
3517                 arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS;
3518                 arsta->txrate.mcs = txrate.mcs;
3519         }
3520
3521         switch (txrate.flags) {
3522         case WMI_RATE_PREAMBLE_OFDM:
3523                 if (arsta->arvif && arsta->arvif->vif)
3524                         conf = rcu_dereference(arsta->arvif->vif->chanctx_conf);
3525                 if (conf && conf->def.chan->band == NL80211_BAND_5GHZ)
3526                         arsta->tx_info.status.rates[0].idx = rate_idx - 4;
3527                 break;
3528         case WMI_RATE_PREAMBLE_CCK:
3529                 arsta->tx_info.status.rates[0].idx = rate_idx;
3530                 if (sgi)
3531                         arsta->tx_info.status.rates[0].flags |=
3532                                 (IEEE80211_TX_RC_USE_SHORT_PREAMBLE |
3533                                  IEEE80211_TX_RC_SHORT_GI);
3534                 break;
3535         case WMI_RATE_PREAMBLE_HT:
3536                 arsta->tx_info.status.rates[0].idx =
3537                                 txrate.mcs + ((txrate.nss - 1) * 8);
3538                 if (sgi)
3539                         arsta->tx_info.status.rates[0].flags |=
3540                                         IEEE80211_TX_RC_SHORT_GI;
3541                 arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_MCS;
3542                 break;
3543         case WMI_RATE_PREAMBLE_VHT:
3544                 ieee80211_rate_set_vht(&arsta->tx_info.status.rates[0],
3545                                        txrate.mcs, txrate.nss);
3546                 if (sgi)
3547                         arsta->tx_info.status.rates[0].flags |=
3548                                                 IEEE80211_TX_RC_SHORT_GI;
3549                 arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_VHT_MCS;
3550                 break;
3551         }
3552
3553         arsta->txrate.nss = txrate.nss;
3554         arsta->txrate.bw = ath10k_bw_to_mac80211_bw(txrate.bw);
3555         arsta->last_tx_bitrate = cfg80211_calculate_bitrate(&arsta->txrate);
3556         if (sgi)
3557                 arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
3558
3559         switch (arsta->txrate.bw) {
3560         case RATE_INFO_BW_40:
3561                 arsta->tx_info.status.rates[0].flags |=
3562                                 IEEE80211_TX_RC_40_MHZ_WIDTH;
3563                 break;
3564         case RATE_INFO_BW_80:
3565                 arsta->tx_info.status.rates[0].flags |=
3566                                 IEEE80211_TX_RC_80_MHZ_WIDTH;
3567                 break;
3568         }
3569
3570         if (peer_stats->succ_pkts) {
3571                 arsta->tx_info.flags = IEEE80211_TX_STAT_ACK;
3572                 arsta->tx_info.status.rates[0].count = 1;
3573                 ieee80211_tx_rate_update(ar->hw, sta, &arsta->tx_info);
3574         }
3575
3576         if (ath10k_debug_is_extd_tx_stats_enabled(ar))
3577                 ath10k_accumulate_per_peer_tx_stats(ar, arsta, peer_stats,
3578                                                     rate_idx);
3579 }
3580
3581 static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
3582                                         struct sk_buff *skb)
3583 {
3584         struct htt_resp *resp = (struct htt_resp *)skb->data;
3585         struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3586         struct htt_per_peer_tx_stats_ind *tx_stats;
3587         struct ieee80211_sta *sta;
3588         struct ath10k_peer *peer;
3589         int peer_id, i;
3590         u8 ppdu_len, num_ppdu;
3591
3592         num_ppdu = resp->peer_tx_stats.num_ppdu;
3593         ppdu_len = resp->peer_tx_stats.ppdu_len * sizeof(__le32);
3594
3595         if (skb->len < sizeof(struct htt_resp_hdr) + num_ppdu * ppdu_len) {
3596                 ath10k_warn(ar, "Invalid peer stats buf length %d\n", skb->len);
3597                 return;
3598         }
3599
3600         tx_stats = (struct htt_per_peer_tx_stats_ind *)
3601                         (resp->peer_tx_stats.payload);
3602         peer_id = __le16_to_cpu(tx_stats->peer_id);
3603
3604         rcu_read_lock();
3605         spin_lock_bh(&ar->data_lock);
3606         peer = ath10k_peer_find_by_id(ar, peer_id);
3607         if (!peer || !peer->sta) {
3608                 ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n",
3609                             peer_id);
3610                 goto out;
3611         }
3612
3613         sta = peer->sta;
3614         for (i = 0; i < num_ppdu; i++) {
3615                 tx_stats = (struct htt_per_peer_tx_stats_ind *)
3616                            (resp->peer_tx_stats.payload + i * ppdu_len);
3617
3618                 p_tx_stats->succ_bytes = __le32_to_cpu(tx_stats->succ_bytes);
3619                 p_tx_stats->retry_bytes = __le32_to_cpu(tx_stats->retry_bytes);
3620                 p_tx_stats->failed_bytes =
3621                                 __le32_to_cpu(tx_stats->failed_bytes);
3622                 p_tx_stats->ratecode = tx_stats->ratecode;
3623                 p_tx_stats->flags = tx_stats->flags;
3624                 p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts);
3625                 p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts);
3626                 p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts);
3627                 p_tx_stats->duration = __le16_to_cpu(tx_stats->tx_duration);
3628
3629                 ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3630         }
3631
3632 out:
3633         spin_unlock_bh(&ar->data_lock);
3634         rcu_read_unlock();
3635 }
3636
3637 static void ath10k_fetch_10_2_tx_stats(struct ath10k *ar, u8 *data)
3638 {
3639         struct ath10k_pktlog_hdr *hdr = (struct ath10k_pktlog_hdr *)data;
3640         struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3641         struct ath10k_10_2_peer_tx_stats *tx_stats;
3642         struct ieee80211_sta *sta;
3643         struct ath10k_peer *peer;
3644         u16 log_type = __le16_to_cpu(hdr->log_type);
3645         u32 peer_id = 0, i;
3646
3647         if (log_type != ATH_PKTLOG_TYPE_TX_STAT)
3648                 return;
3649
3650         tx_stats = (struct ath10k_10_2_peer_tx_stats *)((hdr->payload) +
3651                     ATH10K_10_2_TX_STATS_OFFSET);
3652
3653         if (!tx_stats->tx_ppdu_cnt)
3654                 return;
3655
3656         peer_id = tx_stats->peer_id;
3657
3658         rcu_read_lock();
3659         spin_lock_bh(&ar->data_lock);
3660         peer = ath10k_peer_find_by_id(ar, peer_id);
3661         if (!peer || !peer->sta) {
3662                 ath10k_warn(ar, "Invalid peer id %d in peer stats buffer\n",
3663                             peer_id);
3664                 goto out;
3665         }
3666
3667         sta = peer->sta;
3668         for (i = 0; i < tx_stats->tx_ppdu_cnt; i++) {
3669                 p_tx_stats->succ_bytes =
3670                         __le16_to_cpu(tx_stats->success_bytes[i]);
3671                 p_tx_stats->retry_bytes =
3672                         __le16_to_cpu(tx_stats->retry_bytes[i]);
3673                 p_tx_stats->failed_bytes =
3674                         __le16_to_cpu(tx_stats->failed_bytes[i]);
3675                 p_tx_stats->ratecode = tx_stats->ratecode[i];
3676                 p_tx_stats->flags = tx_stats->flags[i];
3677                 p_tx_stats->succ_pkts = tx_stats->success_pkts[i];
3678                 p_tx_stats->retry_pkts = tx_stats->retry_pkts[i];
3679                 p_tx_stats->failed_pkts = tx_stats->failed_pkts[i];
3680
3681                 ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3682         }
3683         spin_unlock_bh(&ar->data_lock);
3684         rcu_read_unlock();
3685
3686         return;
3687
3688 out:
3689         spin_unlock_bh(&ar->data_lock);
3690         rcu_read_unlock();
3691 }
3692
3693 static int ath10k_htt_rx_pn_len(enum htt_security_types sec_type)
3694 {
3695         switch (sec_type) {
3696         case HTT_SECURITY_TKIP:
3697         case HTT_SECURITY_TKIP_NOMIC:
3698         case HTT_SECURITY_AES_CCMP:
3699                 return 48;
3700         default:
3701                 return 0;
3702         }
3703 }
3704
3705 static void ath10k_htt_rx_sec_ind_handler(struct ath10k *ar,
3706                                           struct htt_security_indication *ev)
3707 {
3708         enum htt_txrx_sec_cast_type sec_index;
3709         enum htt_security_types sec_type;
3710         struct ath10k_peer *peer;
3711
3712         spin_lock_bh(&ar->data_lock);
3713
3714         peer = ath10k_peer_find_by_id(ar, __le16_to_cpu(ev->peer_id));
3715         if (!peer) {
3716                 ath10k_warn(ar, "failed to find peer id %d for security indication",
3717                             __le16_to_cpu(ev->peer_id));
3718                 goto out;
3719         }
3720
3721         sec_type = MS(ev->flags, HTT_SECURITY_TYPE);
3722
3723         if (ev->flags & HTT_SECURITY_IS_UNICAST)
3724                 sec_index = HTT_TXRX_SEC_UCAST;
3725         else
3726                 sec_index = HTT_TXRX_SEC_MCAST;
3727
3728         peer->rx_pn[sec_index].sec_type = sec_type;
3729         peer->rx_pn[sec_index].pn_len = ath10k_htt_rx_pn_len(sec_type);
3730
3731         memset(peer->tids_last_pn_valid, 0, sizeof(peer->tids_last_pn_valid));
3732         memset(peer->tids_last_pn, 0, sizeof(peer->tids_last_pn));
3733
3734 out:
3735         spin_unlock_bh(&ar->data_lock);
3736 }
3737
3738 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3739 {
3740         struct ath10k_htt *htt = &ar->htt;
3741         struct htt_resp *resp = (struct htt_resp *)skb->data;
3742         enum htt_t2h_msg_type type;
3743
3744         /* confirm alignment */
3745         if (!IS_ALIGNED((unsigned long)skb->data, 4))
3746                 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
3747
3748         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
3749                    resp->hdr.msg_type);
3750
3751         if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
3752                 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
3753                            resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
3754                 return true;
3755         }
3756         type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
3757
3758         switch (type) {
3759         case HTT_T2H_MSG_TYPE_VERSION_CONF: {
3760                 htt->target_version_major = resp->ver_resp.major;
3761                 htt->target_version_minor = resp->ver_resp.minor;
3762                 complete(&htt->target_version_received);
3763                 break;
3764         }
3765         case HTT_T2H_MSG_TYPE_RX_IND:
3766                 if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
3767                         ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind);
3768                 } else {
3769                         skb_queue_tail(&htt->rx_indication_head, skb);
3770                         return false;
3771                 }
3772                 break;
3773         case HTT_T2H_MSG_TYPE_PEER_MAP: {
3774                 struct htt_peer_map_event ev = {
3775                         .vdev_id = resp->peer_map.vdev_id,
3776                         .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
3777                 };
3778                 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
3779                 ath10k_peer_map_event(htt, &ev);
3780                 break;
3781         }
3782         case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
3783                 struct htt_peer_unmap_event ev = {
3784                         .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
3785                 };
3786                 ath10k_peer_unmap_event(htt, &ev);
3787                 break;
3788         }
3789         case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
3790                 struct htt_tx_done tx_done = {};
3791                 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
3792                 int info = __le32_to_cpu(resp->mgmt_tx_completion.info);
3793
3794                 tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
3795
3796                 switch (status) {
3797                 case HTT_MGMT_TX_STATUS_OK:
3798                         tx_done.status = HTT_TX_COMPL_STATE_ACK;
3799                         if (test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS,
3800                                      ar->wmi.svc_map) &&
3801                             (resp->mgmt_tx_completion.flags &
3802                              HTT_MGMT_TX_CMPL_FLAG_ACK_RSSI)) {
3803                                 tx_done.ack_rssi =
3804                                 FIELD_GET(HTT_MGMT_TX_CMPL_INFO_ACK_RSSI_MASK,
3805                                           info);
3806                         }
3807                         break;
3808                 case HTT_MGMT_TX_STATUS_RETRY:
3809                         tx_done.status = HTT_TX_COMPL_STATE_NOACK;
3810                         break;
3811                 case HTT_MGMT_TX_STATUS_DROP:
3812                         tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
3813                         break;
3814                 }
3815
3816                 status = ath10k_txrx_tx_unref(htt, &tx_done);
3817                 if (!status) {
3818                         spin_lock_bh(&htt->tx_lock);
3819                         ath10k_htt_tx_mgmt_dec_pending(htt);
3820                         spin_unlock_bh(&htt->tx_lock);
3821                 }
3822                 break;
3823         }
3824         case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
3825                 ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
3826                 break;
3827         case HTT_T2H_MSG_TYPE_SEC_IND: {
3828                 struct ath10k *ar = htt->ar;
3829                 struct htt_security_indication *ev = &resp->security_indication;
3830
3831                 ath10k_htt_rx_sec_ind_handler(ar, ev);
3832                 ath10k_dbg(ar, ATH10K_DBG_HTT,
3833                            "sec ind peer_id %d unicast %d type %d\n",
3834                           __le16_to_cpu(ev->peer_id),
3835                           !!(ev->flags & HTT_SECURITY_IS_UNICAST),
3836                           MS(ev->flags, HTT_SECURITY_TYPE));
3837                 complete(&ar->install_key_done);
3838                 break;
3839         }
3840         case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
3841                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
3842                                 skb->data, skb->len);
3843                 atomic_inc(&htt->num_mpdus_ready);
3844
3845                 return ath10k_htt_rx_proc_rx_frag_ind(htt,
3846                                                       &resp->rx_frag_ind,
3847                                                       skb);
3848                 break;
3849         }
3850         case HTT_T2H_MSG_TYPE_TEST:
3851                 break;
3852         case HTT_T2H_MSG_TYPE_STATS_CONF:
3853                 trace_ath10k_htt_stats(ar, skb->data, skb->len);
3854                 break;
3855         case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
3856                 /* Firmware can return tx frames if it's unable to fully
3857                  * process them and suspects host may be able to fix it. ath10k
3858                  * sends all tx frames as already inspected so this shouldn't
3859                  * happen unless fw has a bug.
3860                  */
3861                 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
3862                 break;
3863         case HTT_T2H_MSG_TYPE_RX_ADDBA:
3864                 ath10k_htt_rx_addba(ar, resp);
3865                 break;
3866         case HTT_T2H_MSG_TYPE_RX_DELBA:
3867                 ath10k_htt_rx_delba(ar, resp);
3868                 break;
3869         case HTT_T2H_MSG_TYPE_PKTLOG: {
3870                 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
3871                                         skb->len -
3872                                         offsetof(struct htt_resp,
3873                                                  pktlog_msg.payload));
3874
3875                 if (ath10k_peer_stats_enabled(ar))
3876                         ath10k_fetch_10_2_tx_stats(ar,
3877                                                    resp->pktlog_msg.payload);
3878                 break;
3879         }
3880         case HTT_T2H_MSG_TYPE_RX_FLUSH: {
3881                 /* Ignore this event because mac80211 takes care of Rx
3882                  * aggregation reordering.
3883                  */
3884                 break;
3885         }
3886         case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
3887                 skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
3888                 return false;
3889         }
3890         case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
3891                 break;
3892         case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
3893                 u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
3894                 u32 freq = __le32_to_cpu(resp->chan_change.freq);
3895
3896                 ar->tgt_oper_chan = ieee80211_get_channel(ar->hw->wiphy, freq);
3897                 ath10k_dbg(ar, ATH10K_DBG_HTT,
3898                            "htt chan change freq %u phymode %s\n",
3899                            freq, ath10k_wmi_phymode_str(phymode));
3900                 break;
3901         }
3902         case HTT_T2H_MSG_TYPE_AGGR_CONF:
3903                 break;
3904         case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
3905                 struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
3906
3907                 if (!tx_fetch_ind) {
3908                         ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
3909                         break;
3910                 }
3911                 skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
3912                 break;
3913         }
3914         case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
3915                 ath10k_htt_rx_tx_fetch_confirm(ar, skb);
3916                 break;
3917         case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
3918                 ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
3919                 break;
3920         case HTT_T2H_MSG_TYPE_PEER_STATS:
3921                 ath10k_htt_fetch_peer_stats(ar, skb);
3922                 break;
3923         case HTT_T2H_MSG_TYPE_EN_STATS:
3924         default:
3925                 ath10k_warn(ar, "htt event (%d) not handled\n",
3926                             resp->hdr.msg_type);
3927                 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
3928                                 skb->data, skb->len);
3929                 break;
3930         }
3931         return true;
3932 }
3933 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
3934
3935 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
3936                                              struct sk_buff *skb)
3937 {
3938         trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
3939         dev_kfree_skb_any(skb);
3940 }
3941 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
3942
3943 static int ath10k_htt_rx_deliver_msdu(struct ath10k *ar, int quota, int budget)
3944 {
3945         struct sk_buff *skb;
3946
3947         while (quota < budget) {
3948                 if (skb_queue_empty(&ar->htt.rx_msdus_q))
3949                         break;
3950
3951                 skb = skb_dequeue(&ar->htt.rx_msdus_q);
3952                 if (!skb)
3953                         break;
3954                 ath10k_process_rx(ar, skb);
3955                 quota++;
3956         }
3957
3958         return quota;
3959 }
3960
3961 int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget)
3962 {
3963         struct htt_resp *resp;
3964         struct ath10k_htt *htt = &ar->htt;
3965         struct sk_buff *skb;
3966         bool release;
3967         int quota;
3968
3969         for (quota = 0; quota < budget; quota++) {
3970                 skb = skb_dequeue(&htt->rx_indication_head);
3971                 if (!skb)
3972                         break;
3973
3974                 resp = (struct htt_resp *)skb->data;
3975
3976                 release = ath10k_htt_rx_proc_rx_ind_hl(htt,
3977                                                        &resp->rx_ind_hl,
3978                                                        skb,
3979                                                        HTT_RX_PN_CHECK,
3980                                                        HTT_RX_NON_TKIP_MIC);
3981
3982                 if (release)
3983                         dev_kfree_skb_any(skb);
3984
3985                 ath10k_dbg(ar, ATH10K_DBG_HTT, "rx indication poll pending count:%d\n",
3986                            skb_queue_len(&htt->rx_indication_head));
3987         }
3988         return quota;
3989 }
3990 EXPORT_SYMBOL(ath10k_htt_rx_hl_indication);
3991
3992 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
3993 {
3994         struct ath10k_htt *htt = &ar->htt;
3995         struct htt_tx_done tx_done = {};
3996         struct sk_buff_head tx_ind_q;
3997         struct sk_buff *skb;
3998         unsigned long flags;
3999         int quota = 0, done, ret;
4000         bool resched_napi = false;
4001
4002         __skb_queue_head_init(&tx_ind_q);
4003
4004         /* Process pending frames before dequeuing more data
4005          * from hardware.
4006          */
4007         quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4008         if (quota == budget) {
4009                 resched_napi = true;
4010                 goto exit;
4011         }
4012
4013         while ((skb = skb_dequeue(&htt->rx_in_ord_compl_q))) {
4014                 spin_lock_bh(&htt->rx_ring.lock);
4015                 ret = ath10k_htt_rx_in_ord_ind(ar, skb);
4016                 spin_unlock_bh(&htt->rx_ring.lock);
4017
4018                 dev_kfree_skb_any(skb);
4019                 if (ret == -EIO) {
4020                         resched_napi = true;
4021                         goto exit;
4022                 }
4023         }
4024
4025         while (atomic_read(&htt->num_mpdus_ready)) {
4026                 ret = ath10k_htt_rx_handle_amsdu(htt);
4027                 if (ret == -EIO) {
4028                         resched_napi = true;
4029                         goto exit;
4030                 }
4031                 atomic_dec(&htt->num_mpdus_ready);
4032         }
4033
4034         /* Deliver received data after processing data from hardware */
4035         quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4036
4037         /* From NAPI documentation:
4038          *  The napi poll() function may also process TX completions, in which
4039          *  case if it processes the entire TX ring then it should count that
4040          *  work as the rest of the budget.
4041          */
4042         if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo))
4043                 quota = budget;
4044
4045         /* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
4046          * From kfifo_get() documentation:
4047          *  Note that with only one concurrent reader and one concurrent writer,
4048          *  you don't need extra locking to use these macro.
4049          */
4050         while (kfifo_get(&htt->txdone_fifo, &tx_done))
4051                 ath10k_txrx_tx_unref(htt, &tx_done);
4052
4053         ath10k_mac_tx_push_pending(ar);
4054
4055         spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
4056         skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
4057         spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
4058
4059         while ((skb = __skb_dequeue(&tx_ind_q))) {
4060                 ath10k_htt_rx_tx_fetch_ind(ar, skb);
4061                 dev_kfree_skb_any(skb);
4062         }
4063
4064 exit:
4065         ath10k_htt_rx_msdu_buff_replenish(htt);
4066         /* In case of rx failure or more data to read, report budget
4067          * to reschedule NAPI poll
4068          */
4069         done = resched_napi ? budget : quota;
4070
4071         return done;
4072 }
4073 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);
4074
4075 static const struct ath10k_htt_rx_ops htt_rx_ops_32 = {
4076         .htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_32,
4077         .htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_32,
4078         .htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_32,
4079         .htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_32,
4080         .htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_32,
4081 };
4082
4083 static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
4084         .htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_64,
4085         .htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_64,
4086         .htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_64,
4087         .htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_64,
4088         .htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
4089 };
4090
4091 static const struct ath10k_htt_rx_ops htt_rx_ops_hl = {
4092         .htt_rx_proc_rx_frag_ind = ath10k_htt_rx_proc_rx_frag_ind_hl,
4093 };
4094
4095 void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
4096 {
4097         struct ath10k *ar = htt->ar;
4098
4099         if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
4100                 htt->rx_ops = &htt_rx_ops_hl;
4101         else if (ar->hw_params.target_64bit)
4102                 htt->rx_ops = &htt_rx_ops_64;
4103         else
4104                 htt->rx_ops = &htt_rx_ops_32;
4105 }