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

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