1 /* 2 * Copyright (c) 2005-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include "core.h" 19 #include "htc.h" 20 #include "htt.h" 21 #include "txrx.h" 22 #include "debug.h" 23 #include "trace.h" 24 #include "mac.h" 25 26 #include <linux/log2.h> 27 28 #define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX 29 #define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1) 30 31 /* when under memory pressure rx ring refill may fail and needs a retry */ 32 #define HTT_RX_RING_REFILL_RETRY_MS 50 33 34 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb); 35 static void ath10k_htt_txrx_compl_task(unsigned long ptr); 36 37 static struct sk_buff * 38 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 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 int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num) 87 { 88 struct htt_rx_desc *rx_desc; 89 struct ath10k_skb_rxcb *rxcb; 90 struct sk_buff *skb; 91 dma_addr_t paddr; 92 int ret = 0, idx; 93 94 /* The Full Rx Reorder firmware has no way of telling the host 95 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring. 96 * To keep things simple make sure ring is always half empty. This 97 * guarantees there'll be no replenishment overruns possible. 98 */ 99 BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2); 100 101 idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr); 102 while (num > 0) { 103 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN); 104 if (!skb) { 105 ret = -ENOMEM; 106 goto fail; 107 } 108 109 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN)) 110 skb_pull(skb, 111 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) - 112 skb->data); 113 114 /* Clear rx_desc attention word before posting to Rx ring */ 115 rx_desc = (struct htt_rx_desc *)skb->data; 116 rx_desc->attention.flags = __cpu_to_le32(0); 117 118 paddr = dma_map_single(htt->ar->dev, skb->data, 119 skb->len + skb_tailroom(skb), 120 DMA_FROM_DEVICE); 121 122 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) { 123 dev_kfree_skb_any(skb); 124 ret = -ENOMEM; 125 goto fail; 126 } 127 128 rxcb = ATH10K_SKB_RXCB(skb); 129 rxcb->paddr = paddr; 130 htt->rx_ring.netbufs_ring[idx] = skb; 131 htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr); 132 htt->rx_ring.fill_cnt++; 133 134 if (htt->rx_ring.in_ord_rx) { 135 hash_add(htt->rx_ring.skb_table, 136 &ATH10K_SKB_RXCB(skb)->hlist, 137 (u32)paddr); 138 } 139 140 num--; 141 idx++; 142 idx &= htt->rx_ring.size_mask; 143 } 144 145 fail: 146 /* 147 * Make sure the rx buffer is updated before available buffer 148 * index to avoid any potential rx ring corruption. 149 */ 150 mb(); 151 *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx); 152 return ret; 153 } 154 155 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num) 156 { 157 lockdep_assert_held(&htt->rx_ring.lock); 158 return __ath10k_htt_rx_ring_fill_n(htt, num); 159 } 160 161 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt) 162 { 163 int ret, num_deficit, num_to_fill; 164 165 /* Refilling the whole RX ring buffer proves to be a bad idea. The 166 * reason is RX may take up significant amount of CPU cycles and starve 167 * other tasks, e.g. TX on an ethernet device while acting as a bridge 168 * with ath10k wlan interface. This ended up with very poor performance 169 * once CPU the host system was overwhelmed with RX on ath10k. 170 * 171 * By limiting the number of refills the replenishing occurs 172 * progressively. This in turns makes use of the fact tasklets are 173 * processed in FIFO order. This means actual RX processing can starve 174 * out refilling. If there's not enough buffers on RX ring FW will not 175 * report RX until it is refilled with enough buffers. This 176 * automatically balances load wrt to CPU power. 177 * 178 * This probably comes at a cost of lower maximum throughput but 179 * improves the average and stability. */ 180 spin_lock_bh(&htt->rx_ring.lock); 181 num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt; 182 num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit); 183 num_deficit -= num_to_fill; 184 ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill); 185 if (ret == -ENOMEM) { 186 /* 187 * Failed to fill it to the desired level - 188 * we'll start a timer and try again next time. 189 * As long as enough buffers are left in the ring for 190 * another A-MPDU rx, no special recovery is needed. 191 */ 192 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies + 193 msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS)); 194 } else if (num_deficit > 0) { 195 tasklet_schedule(&htt->rx_replenish_task); 196 } 197 spin_unlock_bh(&htt->rx_ring.lock); 198 } 199 200 static void ath10k_htt_rx_ring_refill_retry(unsigned long arg) 201 { 202 struct ath10k_htt *htt = (struct ath10k_htt *)arg; 203 204 ath10k_htt_rx_msdu_buff_replenish(htt); 205 } 206 207 int ath10k_htt_rx_ring_refill(struct ath10k *ar) 208 { 209 struct ath10k_htt *htt = &ar->htt; 210 int ret; 211 212 spin_lock_bh(&htt->rx_ring.lock); 213 ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level - 214 htt->rx_ring.fill_cnt)); 215 spin_unlock_bh(&htt->rx_ring.lock); 216 217 if (ret) 218 ath10k_htt_rx_ring_free(htt); 219 220 return ret; 221 } 222 223 void ath10k_htt_rx_free(struct ath10k_htt *htt) 224 { 225 del_timer_sync(&htt->rx_ring.refill_retry_timer); 226 tasklet_kill(&htt->rx_replenish_task); 227 tasklet_kill(&htt->txrx_compl_task); 228 229 skb_queue_purge(&htt->tx_compl_q); 230 skb_queue_purge(&htt->rx_compl_q); 231 skb_queue_purge(&htt->rx_in_ord_compl_q); 232 233 ath10k_htt_rx_ring_free(htt); 234 235 dma_free_coherent(htt->ar->dev, 236 (htt->rx_ring.size * 237 sizeof(htt->rx_ring.paddrs_ring)), 238 htt->rx_ring.paddrs_ring, 239 htt->rx_ring.base_paddr); 240 241 dma_free_coherent(htt->ar->dev, 242 sizeof(*htt->rx_ring.alloc_idx.vaddr), 243 htt->rx_ring.alloc_idx.vaddr, 244 htt->rx_ring.alloc_idx.paddr); 245 246 kfree(htt->rx_ring.netbufs_ring); 247 } 248 249 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt) 250 { 251 struct ath10k *ar = htt->ar; 252 int idx; 253 struct sk_buff *msdu; 254 255 lockdep_assert_held(&htt->rx_ring.lock); 256 257 if (htt->rx_ring.fill_cnt == 0) { 258 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n"); 259 return NULL; 260 } 261 262 idx = htt->rx_ring.sw_rd_idx.msdu_payld; 263 msdu = htt->rx_ring.netbufs_ring[idx]; 264 htt->rx_ring.netbufs_ring[idx] = NULL; 265 htt->rx_ring.paddrs_ring[idx] = 0; 266 267 idx++; 268 idx &= htt->rx_ring.size_mask; 269 htt->rx_ring.sw_rd_idx.msdu_payld = idx; 270 htt->rx_ring.fill_cnt--; 271 272 dma_unmap_single(htt->ar->dev, 273 ATH10K_SKB_RXCB(msdu)->paddr, 274 msdu->len + skb_tailroom(msdu), 275 DMA_FROM_DEVICE); 276 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ", 277 msdu->data, msdu->len + skb_tailroom(msdu)); 278 279 return msdu; 280 } 281 282 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */ 283 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt, 284 u8 **fw_desc, int *fw_desc_len, 285 struct sk_buff_head *amsdu) 286 { 287 struct ath10k *ar = htt->ar; 288 int msdu_len, msdu_chaining = 0; 289 struct sk_buff *msdu; 290 struct htt_rx_desc *rx_desc; 291 292 lockdep_assert_held(&htt->rx_ring.lock); 293 294 for (;;) { 295 int last_msdu, msdu_len_invalid, msdu_chained; 296 297 msdu = ath10k_htt_rx_netbuf_pop(htt); 298 if (!msdu) { 299 __skb_queue_purge(amsdu); 300 return -ENOENT; 301 } 302 303 __skb_queue_tail(amsdu, msdu); 304 305 rx_desc = (struct htt_rx_desc *)msdu->data; 306 307 /* FIXME: we must report msdu payload since this is what caller 308 * expects now */ 309 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload)); 310 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload)); 311 312 /* 313 * Sanity check - confirm the HW is finished filling in the 314 * rx data. 315 * If the HW and SW are working correctly, then it's guaranteed 316 * that the HW's MAC DMA is done before this point in the SW. 317 * To prevent the case that we handle a stale Rx descriptor, 318 * just assert for now until we have a way to recover. 319 */ 320 if (!(__le32_to_cpu(rx_desc->attention.flags) 321 & RX_ATTENTION_FLAGS_MSDU_DONE)) { 322 __skb_queue_purge(amsdu); 323 return -EIO; 324 } 325 326 /* 327 * Copy the FW rx descriptor for this MSDU from the rx 328 * indication message into the MSDU's netbuf. HL uses the 329 * same rx indication message definition as LL, and simply 330 * appends new info (fields from the HW rx desc, and the 331 * MSDU payload itself). So, the offset into the rx 332 * indication message only has to account for the standard 333 * offset of the per-MSDU FW rx desc info within the 334 * message, and how many bytes of the per-MSDU FW rx desc 335 * info have already been consumed. (And the endianness of 336 * the host, since for a big-endian host, the rx ind 337 * message contents, including the per-MSDU rx desc bytes, 338 * were byteswapped during upload.) 339 */ 340 if (*fw_desc_len > 0) { 341 rx_desc->fw_desc.info0 = **fw_desc; 342 /* 343 * The target is expected to only provide the basic 344 * per-MSDU rx descriptors. Just to be sure, verify 345 * that the target has not attached extension data 346 * (e.g. LRO flow ID). 347 */ 348 349 /* or more, if there's extension data */ 350 (*fw_desc)++; 351 (*fw_desc_len)--; 352 } else { 353 /* 354 * When an oversized AMSDU happened, FW will lost 355 * some of MSDU status - in this case, the FW 356 * descriptors provided will be less than the 357 * actual MSDUs inside this MPDU. Mark the FW 358 * descriptors so that it will still deliver to 359 * upper stack, if no CRC error for this MPDU. 360 * 361 * FIX THIS - the FW descriptors are actually for 362 * MSDUs in the end of this A-MSDU instead of the 363 * beginning. 364 */ 365 rx_desc->fw_desc.info0 = 0; 366 } 367 368 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags) 369 & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR | 370 RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR)); 371 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0), 372 RX_MSDU_START_INFO0_MSDU_LENGTH); 373 msdu_chained = rx_desc->frag_info.ring2_more_count; 374 375 if (msdu_len_invalid) 376 msdu_len = 0; 377 378 skb_trim(msdu, 0); 379 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE)); 380 msdu_len -= msdu->len; 381 382 /* Note: Chained buffers do not contain rx descriptor */ 383 while (msdu_chained--) { 384 msdu = ath10k_htt_rx_netbuf_pop(htt); 385 if (!msdu) { 386 __skb_queue_purge(amsdu); 387 return -ENOENT; 388 } 389 390 __skb_queue_tail(amsdu, msdu); 391 skb_trim(msdu, 0); 392 skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE)); 393 msdu_len -= msdu->len; 394 msdu_chaining = 1; 395 } 396 397 last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) & 398 RX_MSDU_END_INFO0_LAST_MSDU; 399 400 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention, 401 sizeof(*rx_desc) - sizeof(u32)); 402 403 if (last_msdu) 404 break; 405 } 406 407 if (skb_queue_empty(amsdu)) 408 msdu_chaining = -1; 409 410 /* 411 * Don't refill the ring yet. 412 * 413 * First, the elements popped here are still in use - it is not 414 * safe to overwrite them until the matching call to 415 * mpdu_desc_list_next. Second, for efficiency it is preferable to 416 * refill the rx ring with 1 PPDU's worth of rx buffers (something 417 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers 418 * (something like 3 buffers). Consequently, we'll rely on the txrx 419 * SW to tell us when it is done pulling all the PPDU's rx buffers 420 * out of the rx ring, and then refill it just once. 421 */ 422 423 return msdu_chaining; 424 } 425 426 static void ath10k_htt_rx_replenish_task(unsigned long ptr) 427 { 428 struct ath10k_htt *htt = (struct ath10k_htt *)ptr; 429 430 ath10k_htt_rx_msdu_buff_replenish(htt); 431 } 432 433 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt, 434 u32 paddr) 435 { 436 struct ath10k *ar = htt->ar; 437 struct ath10k_skb_rxcb *rxcb; 438 struct sk_buff *msdu; 439 440 lockdep_assert_held(&htt->rx_ring.lock); 441 442 msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr); 443 if (!msdu) 444 return NULL; 445 446 rxcb = ATH10K_SKB_RXCB(msdu); 447 hash_del(&rxcb->hlist); 448 htt->rx_ring.fill_cnt--; 449 450 dma_unmap_single(htt->ar->dev, rxcb->paddr, 451 msdu->len + skb_tailroom(msdu), 452 DMA_FROM_DEVICE); 453 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ", 454 msdu->data, msdu->len + skb_tailroom(msdu)); 455 456 return msdu; 457 } 458 459 static int ath10k_htt_rx_pop_paddr_list(struct ath10k_htt *htt, 460 struct htt_rx_in_ord_ind *ev, 461 struct sk_buff_head *list) 462 { 463 struct ath10k *ar = htt->ar; 464 struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs; 465 struct htt_rx_desc *rxd; 466 struct sk_buff *msdu; 467 int msdu_count; 468 bool is_offload; 469 u32 paddr; 470 471 lockdep_assert_held(&htt->rx_ring.lock); 472 473 msdu_count = __le16_to_cpu(ev->msdu_count); 474 is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK); 475 476 while (msdu_count--) { 477 paddr = __le32_to_cpu(msdu_desc->msdu_paddr); 478 479 msdu = ath10k_htt_rx_pop_paddr(htt, paddr); 480 if (!msdu) { 481 __skb_queue_purge(list); 482 return -ENOENT; 483 } 484 485 __skb_queue_tail(list, msdu); 486 487 if (!is_offload) { 488 rxd = (void *)msdu->data; 489 490 trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd)); 491 492 skb_put(msdu, sizeof(*rxd)); 493 skb_pull(msdu, sizeof(*rxd)); 494 skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len)); 495 496 if (!(__le32_to_cpu(rxd->attention.flags) & 497 RX_ATTENTION_FLAGS_MSDU_DONE)) { 498 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n"); 499 return -EIO; 500 } 501 } 502 503 msdu_desc++; 504 } 505 506 return 0; 507 } 508 509 int ath10k_htt_rx_alloc(struct ath10k_htt *htt) 510 { 511 struct ath10k *ar = htt->ar; 512 dma_addr_t paddr; 513 void *vaddr; 514 size_t size; 515 struct timer_list *timer = &htt->rx_ring.refill_retry_timer; 516 517 htt->rx_confused = false; 518 519 /* XXX: The fill level could be changed during runtime in response to 520 * the host processing latency. Is this really worth it? 521 */ 522 htt->rx_ring.size = HTT_RX_RING_SIZE; 523 htt->rx_ring.size_mask = htt->rx_ring.size - 1; 524 htt->rx_ring.fill_level = HTT_RX_RING_FILL_LEVEL; 525 526 if (!is_power_of_2(htt->rx_ring.size)) { 527 ath10k_warn(ar, "htt rx ring size is not power of 2\n"); 528 return -EINVAL; 529 } 530 531 htt->rx_ring.netbufs_ring = 532 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *), 533 GFP_KERNEL); 534 if (!htt->rx_ring.netbufs_ring) 535 goto err_netbuf; 536 537 size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring); 538 539 vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA); 540 if (!vaddr) 541 goto err_dma_ring; 542 543 htt->rx_ring.paddrs_ring = vaddr; 544 htt->rx_ring.base_paddr = paddr; 545 546 vaddr = dma_alloc_coherent(htt->ar->dev, 547 sizeof(*htt->rx_ring.alloc_idx.vaddr), 548 &paddr, GFP_DMA); 549 if (!vaddr) 550 goto err_dma_idx; 551 552 htt->rx_ring.alloc_idx.vaddr = vaddr; 553 htt->rx_ring.alloc_idx.paddr = paddr; 554 htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask; 555 *htt->rx_ring.alloc_idx.vaddr = 0; 556 557 /* Initialize the Rx refill retry timer */ 558 setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt); 559 560 spin_lock_init(&htt->rx_ring.lock); 561 562 htt->rx_ring.fill_cnt = 0; 563 htt->rx_ring.sw_rd_idx.msdu_payld = 0; 564 hash_init(htt->rx_ring.skb_table); 565 566 tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task, 567 (unsigned long)htt); 568 569 skb_queue_head_init(&htt->tx_compl_q); 570 skb_queue_head_init(&htt->rx_compl_q); 571 skb_queue_head_init(&htt->rx_in_ord_compl_q); 572 573 tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task, 574 (unsigned long)htt); 575 576 ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n", 577 htt->rx_ring.size, htt->rx_ring.fill_level); 578 return 0; 579 580 err_dma_idx: 581 dma_free_coherent(htt->ar->dev, 582 (htt->rx_ring.size * 583 sizeof(htt->rx_ring.paddrs_ring)), 584 htt->rx_ring.paddrs_ring, 585 htt->rx_ring.base_paddr); 586 err_dma_ring: 587 kfree(htt->rx_ring.netbufs_ring); 588 err_netbuf: 589 return -ENOMEM; 590 } 591 592 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar, 593 enum htt_rx_mpdu_encrypt_type type) 594 { 595 switch (type) { 596 case HTT_RX_MPDU_ENCRYPT_NONE: 597 return 0; 598 case HTT_RX_MPDU_ENCRYPT_WEP40: 599 case HTT_RX_MPDU_ENCRYPT_WEP104: 600 return IEEE80211_WEP_IV_LEN; 601 case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC: 602 case HTT_RX_MPDU_ENCRYPT_TKIP_WPA: 603 return IEEE80211_TKIP_IV_LEN; 604 case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2: 605 return IEEE80211_CCMP_HDR_LEN; 606 case HTT_RX_MPDU_ENCRYPT_WEP128: 607 case HTT_RX_MPDU_ENCRYPT_WAPI: 608 break; 609 } 610 611 ath10k_warn(ar, "unsupported encryption type %d\n", type); 612 return 0; 613 } 614 615 #define MICHAEL_MIC_LEN 8 616 617 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar, 618 enum htt_rx_mpdu_encrypt_type type) 619 { 620 switch (type) { 621 case HTT_RX_MPDU_ENCRYPT_NONE: 622 return 0; 623 case HTT_RX_MPDU_ENCRYPT_WEP40: 624 case HTT_RX_MPDU_ENCRYPT_WEP104: 625 return IEEE80211_WEP_ICV_LEN; 626 case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC: 627 case HTT_RX_MPDU_ENCRYPT_TKIP_WPA: 628 return IEEE80211_TKIP_ICV_LEN; 629 case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2: 630 return IEEE80211_CCMP_MIC_LEN; 631 case HTT_RX_MPDU_ENCRYPT_WEP128: 632 case HTT_RX_MPDU_ENCRYPT_WAPI: 633 break; 634 } 635 636 ath10k_warn(ar, "unsupported encryption type %d\n", type); 637 return 0; 638 } 639 640 struct rfc1042_hdr { 641 u8 llc_dsap; 642 u8 llc_ssap; 643 u8 llc_ctrl; 644 u8 snap_oui[3]; 645 __be16 snap_type; 646 } __packed; 647 648 struct amsdu_subframe_hdr { 649 u8 dst[ETH_ALEN]; 650 u8 src[ETH_ALEN]; 651 __be16 len; 652 } __packed; 653 654 static const u8 rx_legacy_rate_idx[] = { 655 3, /* 0x00 - 11Mbps */ 656 2, /* 0x01 - 5.5Mbps */ 657 1, /* 0x02 - 2Mbps */ 658 0, /* 0x03 - 1Mbps */ 659 3, /* 0x04 - 11Mbps */ 660 2, /* 0x05 - 5.5Mbps */ 661 1, /* 0x06 - 2Mbps */ 662 0, /* 0x07 - 1Mbps */ 663 10, /* 0x08 - 48Mbps */ 664 8, /* 0x09 - 24Mbps */ 665 6, /* 0x0A - 12Mbps */ 666 4, /* 0x0B - 6Mbps */ 667 11, /* 0x0C - 54Mbps */ 668 9, /* 0x0D - 36Mbps */ 669 7, /* 0x0E - 18Mbps */ 670 5, /* 0x0F - 9Mbps */ 671 }; 672 673 static void ath10k_htt_rx_h_rates(struct ath10k *ar, 674 struct ieee80211_rx_status *status, 675 struct htt_rx_desc *rxd) 676 { 677 enum ieee80211_band band; 678 u8 cck, rate, rate_idx, bw, sgi, mcs, nss; 679 u8 preamble = 0; 680 u32 info1, info2, info3; 681 682 /* Band value can't be set as undefined but freq can be 0 - use that to 683 * determine whether band is provided. 684 * 685 * FIXME: Perhaps this can go away if CCK rate reporting is a little 686 * reworked? 687 */ 688 if (!status->freq) 689 return; 690 691 band = status->band; 692 info1 = __le32_to_cpu(rxd->ppdu_start.info1); 693 info2 = __le32_to_cpu(rxd->ppdu_start.info2); 694 info3 = __le32_to_cpu(rxd->ppdu_start.info3); 695 696 preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE); 697 698 switch (preamble) { 699 case HTT_RX_LEGACY: 700 cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT; 701 rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE); 702 rate_idx = 0; 703 704 if (rate < 0x08 || rate > 0x0F) 705 break; 706 707 switch (band) { 708 case IEEE80211_BAND_2GHZ: 709 if (cck) 710 rate &= ~BIT(3); 711 rate_idx = rx_legacy_rate_idx[rate]; 712 break; 713 case IEEE80211_BAND_5GHZ: 714 rate_idx = rx_legacy_rate_idx[rate]; 715 /* We are using same rate table registering 716 HW - ath10k_rates[]. In case of 5GHz skip 717 CCK rates, so -4 here */ 718 rate_idx -= 4; 719 break; 720 default: 721 break; 722 } 723 724 status->rate_idx = rate_idx; 725 break; 726 case HTT_RX_HT: 727 case HTT_RX_HT_WITH_TXBF: 728 /* HT-SIG - Table 20-11 in info2 and info3 */ 729 mcs = info2 & 0x1F; 730 nss = mcs >> 3; 731 bw = (info2 >> 7) & 1; 732 sgi = (info3 >> 7) & 1; 733 734 status->rate_idx = mcs; 735 status->flag |= RX_FLAG_HT; 736 if (sgi) 737 status->flag |= RX_FLAG_SHORT_GI; 738 if (bw) 739 status->flag |= RX_FLAG_40MHZ; 740 break; 741 case HTT_RX_VHT: 742 case HTT_RX_VHT_WITH_TXBF: 743 /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3 744 TODO check this */ 745 mcs = (info3 >> 4) & 0x0F; 746 nss = ((info2 >> 10) & 0x07) + 1; 747 bw = info2 & 3; 748 sgi = info3 & 1; 749 750 status->rate_idx = mcs; 751 status->vht_nss = nss; 752 753 if (sgi) 754 status->flag |= RX_FLAG_SHORT_GI; 755 756 switch (bw) { 757 /* 20MHZ */ 758 case 0: 759 break; 760 /* 40MHZ */ 761 case 1: 762 status->flag |= RX_FLAG_40MHZ; 763 break; 764 /* 80MHZ */ 765 case 2: 766 status->vht_flag |= RX_VHT_FLAG_80MHZ; 767 } 768 769 status->flag |= RX_FLAG_VHT; 770 break; 771 default: 772 break; 773 } 774 } 775 776 static bool ath10k_htt_rx_h_channel(struct ath10k *ar, 777 struct ieee80211_rx_status *status) 778 { 779 struct ieee80211_channel *ch; 780 781 spin_lock_bh(&ar->data_lock); 782 ch = ar->scan_channel; 783 if (!ch) 784 ch = ar->rx_channel; 785 spin_unlock_bh(&ar->data_lock); 786 787 if (!ch) 788 return false; 789 790 status->band = ch->band; 791 status->freq = ch->center_freq; 792 793 return true; 794 } 795 796 static void ath10k_htt_rx_h_signal(struct ath10k *ar, 797 struct ieee80211_rx_status *status, 798 struct htt_rx_desc *rxd) 799 { 800 /* FIXME: Get real NF */ 801 status->signal = ATH10K_DEFAULT_NOISE_FLOOR + 802 rxd->ppdu_start.rssi_comb; 803 status->flag &= ~RX_FLAG_NO_SIGNAL_VAL; 804 } 805 806 static void ath10k_htt_rx_h_mactime(struct ath10k *ar, 807 struct ieee80211_rx_status *status, 808 struct htt_rx_desc *rxd) 809 { 810 /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This 811 * means all prior MSDUs in a PPDU are reported to mac80211 without the 812 * TSF. Is it worth holding frames until end of PPDU is known? 813 * 814 * FIXME: Can we get/compute 64bit TSF? 815 */ 816 status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp); 817 status->flag |= RX_FLAG_MACTIME_END; 818 } 819 820 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar, 821 struct sk_buff_head *amsdu, 822 struct ieee80211_rx_status *status) 823 { 824 struct sk_buff *first; 825 struct htt_rx_desc *rxd; 826 bool is_first_ppdu; 827 bool is_last_ppdu; 828 829 if (skb_queue_empty(amsdu)) 830 return; 831 832 first = skb_peek(amsdu); 833 rxd = (void *)first->data - sizeof(*rxd); 834 835 is_first_ppdu = !!(rxd->attention.flags & 836 __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU)); 837 is_last_ppdu = !!(rxd->attention.flags & 838 __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU)); 839 840 if (is_first_ppdu) { 841 /* New PPDU starts so clear out the old per-PPDU status. */ 842 status->freq = 0; 843 status->rate_idx = 0; 844 status->vht_nss = 0; 845 status->vht_flag &= ~RX_VHT_FLAG_80MHZ; 846 status->flag &= ~(RX_FLAG_HT | 847 RX_FLAG_VHT | 848 RX_FLAG_SHORT_GI | 849 RX_FLAG_40MHZ | 850 RX_FLAG_MACTIME_END); 851 status->flag |= RX_FLAG_NO_SIGNAL_VAL; 852 853 ath10k_htt_rx_h_signal(ar, status, rxd); 854 ath10k_htt_rx_h_channel(ar, status); 855 ath10k_htt_rx_h_rates(ar, status, rxd); 856 } 857 858 if (is_last_ppdu) 859 ath10k_htt_rx_h_mactime(ar, status, rxd); 860 } 861 862 static const char * const tid_to_ac[] = { 863 "BE", 864 "BK", 865 "BK", 866 "BE", 867 "VI", 868 "VI", 869 "VO", 870 "VO", 871 }; 872 873 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size) 874 { 875 u8 *qc; 876 int tid; 877 878 if (!ieee80211_is_data_qos(hdr->frame_control)) 879 return ""; 880 881 qc = ieee80211_get_qos_ctl(hdr); 882 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 883 if (tid < 8) 884 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]); 885 else 886 snprintf(out, size, "tid %d", tid); 887 888 return out; 889 } 890 891 static void ath10k_process_rx(struct ath10k *ar, 892 struct ieee80211_rx_status *rx_status, 893 struct sk_buff *skb) 894 { 895 struct ieee80211_rx_status *status; 896 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 897 char tid[32]; 898 899 status = IEEE80211_SKB_RXCB(skb); 900 *status = *rx_status; 901 902 ath10k_dbg(ar, ATH10K_DBG_DATA, 903 "rx skb %p len %u peer %pM %s %s sn %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i mic-err %i amsdu-more %i\n", 904 skb, 905 skb->len, 906 ieee80211_get_SA(hdr), 907 ath10k_get_tid(hdr, tid, sizeof(tid)), 908 is_multicast_ether_addr(ieee80211_get_DA(hdr)) ? 909 "mcast" : "ucast", 910 (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4, 911 status->flag == 0 ? "legacy" : "", 912 status->flag & RX_FLAG_HT ? "ht" : "", 913 status->flag & RX_FLAG_VHT ? "vht" : "", 914 status->flag & RX_FLAG_40MHZ ? "40" : "", 915 status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "", 916 status->flag & RX_FLAG_SHORT_GI ? "sgi " : "", 917 status->rate_idx, 918 status->vht_nss, 919 status->freq, 920 status->band, status->flag, 921 !!(status->flag & RX_FLAG_FAILED_FCS_CRC), 922 !!(status->flag & RX_FLAG_MMIC_ERROR), 923 !!(status->flag & RX_FLAG_AMSDU_MORE)); 924 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ", 925 skb->data, skb->len); 926 trace_ath10k_rx_hdr(ar, skb->data, skb->len); 927 trace_ath10k_rx_payload(ar, skb->data, skb->len); 928 929 ieee80211_rx(ar->hw, skb); 930 } 931 932 static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr) 933 { 934 /* nwifi header is padded to 4 bytes. this fixes 4addr rx */ 935 return round_up(ieee80211_hdrlen(hdr->frame_control), 4); 936 } 937 938 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar, 939 struct sk_buff *msdu, 940 struct ieee80211_rx_status *status, 941 enum htt_rx_mpdu_encrypt_type enctype, 942 bool is_decrypted) 943 { 944 struct ieee80211_hdr *hdr; 945 struct htt_rx_desc *rxd; 946 size_t hdr_len; 947 size_t crypto_len; 948 bool is_first; 949 bool is_last; 950 951 rxd = (void *)msdu->data - sizeof(*rxd); 952 is_first = !!(rxd->msdu_end.info0 & 953 __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)); 954 is_last = !!(rxd->msdu_end.info0 & 955 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU)); 956 957 /* Delivered decapped frame: 958 * [802.11 header] 959 * [crypto param] <-- can be trimmed if !fcs_err && 960 * !decrypt_err && !peer_idx_invalid 961 * [amsdu header] <-- only if A-MSDU 962 * [rfc1042/llc] 963 * [payload] 964 * [FCS] <-- at end, needs to be trimmed 965 */ 966 967 /* This probably shouldn't happen but warn just in case */ 968 if (unlikely(WARN_ON_ONCE(!is_first))) 969 return; 970 971 /* This probably shouldn't happen but warn just in case */ 972 if (unlikely(WARN_ON_ONCE(!(is_first && is_last)))) 973 return; 974 975 skb_trim(msdu, msdu->len - FCS_LEN); 976 977 /* In most cases this will be true for sniffed frames. It makes sense 978 * to deliver them as-is without stripping the crypto param. This would 979 * also make sense for software based decryption (which is not 980 * implemented in ath10k). 981 * 982 * If there's no error then the frame is decrypted. At least that is 983 * the case for frames that come in via fragmented rx indication. 984 */ 985 if (!is_decrypted) 986 return; 987 988 /* The payload is decrypted so strip crypto params. Start from tail 989 * since hdr is used to compute some stuff. 990 */ 991 992 hdr = (void *)msdu->data; 993 994 /* Tail */ 995 skb_trim(msdu, msdu->len - ath10k_htt_rx_crypto_tail_len(ar, enctype)); 996 997 /* MMIC */ 998 if (!ieee80211_has_morefrags(hdr->frame_control) && 999 enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA) 1000 skb_trim(msdu, msdu->len - 8); 1001 1002 /* Head */ 1003 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1004 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype); 1005 1006 memmove((void *)msdu->data + crypto_len, 1007 (void *)msdu->data, hdr_len); 1008 skb_pull(msdu, crypto_len); 1009 } 1010 1011 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar, 1012 struct sk_buff *msdu, 1013 struct ieee80211_rx_status *status, 1014 const u8 first_hdr[64]) 1015 { 1016 struct ieee80211_hdr *hdr; 1017 size_t hdr_len; 1018 u8 da[ETH_ALEN]; 1019 u8 sa[ETH_ALEN]; 1020 1021 /* Delivered decapped frame: 1022 * [nwifi 802.11 header] <-- replaced with 802.11 hdr 1023 * [rfc1042/llc] 1024 * 1025 * Note: The nwifi header doesn't have QoS Control and is 1026 * (always?) a 3addr frame. 1027 * 1028 * Note2: There's no A-MSDU subframe header. Even if it's part 1029 * of an A-MSDU. 1030 */ 1031 1032 /* pull decapped header and copy SA & DA */ 1033 hdr = (struct ieee80211_hdr *)msdu->data; 1034 hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr); 1035 ether_addr_copy(da, ieee80211_get_DA(hdr)); 1036 ether_addr_copy(sa, ieee80211_get_SA(hdr)); 1037 skb_pull(msdu, hdr_len); 1038 1039 /* push original 802.11 header */ 1040 hdr = (struct ieee80211_hdr *)first_hdr; 1041 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1042 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); 1043 1044 /* original 802.11 header has a different DA and in 1045 * case of 4addr it may also have different SA 1046 */ 1047 hdr = (struct ieee80211_hdr *)msdu->data; 1048 ether_addr_copy(ieee80211_get_DA(hdr), da); 1049 ether_addr_copy(ieee80211_get_SA(hdr), sa); 1050 } 1051 1052 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar, 1053 struct sk_buff *msdu, 1054 enum htt_rx_mpdu_encrypt_type enctype) 1055 { 1056 struct ieee80211_hdr *hdr; 1057 struct htt_rx_desc *rxd; 1058 size_t hdr_len, crypto_len; 1059 void *rfc1042; 1060 bool is_first, is_last, is_amsdu; 1061 1062 rxd = (void *)msdu->data - sizeof(*rxd); 1063 hdr = (void *)rxd->rx_hdr_status; 1064 1065 is_first = !!(rxd->msdu_end.info0 & 1066 __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)); 1067 is_last = !!(rxd->msdu_end.info0 & 1068 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU)); 1069 is_amsdu = !(is_first && is_last); 1070 1071 rfc1042 = hdr; 1072 1073 if (is_first) { 1074 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1075 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype); 1076 1077 rfc1042 += round_up(hdr_len, 4) + 1078 round_up(crypto_len, 4); 1079 } 1080 1081 if (is_amsdu) 1082 rfc1042 += sizeof(struct amsdu_subframe_hdr); 1083 1084 return rfc1042; 1085 } 1086 1087 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar, 1088 struct sk_buff *msdu, 1089 struct ieee80211_rx_status *status, 1090 const u8 first_hdr[64], 1091 enum htt_rx_mpdu_encrypt_type enctype) 1092 { 1093 struct ieee80211_hdr *hdr; 1094 struct ethhdr *eth; 1095 size_t hdr_len; 1096 void *rfc1042; 1097 u8 da[ETH_ALEN]; 1098 u8 sa[ETH_ALEN]; 1099 1100 /* Delivered decapped frame: 1101 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc 1102 * [payload] 1103 */ 1104 1105 rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype); 1106 if (WARN_ON_ONCE(!rfc1042)) 1107 return; 1108 1109 /* pull decapped header and copy SA & DA */ 1110 eth = (struct ethhdr *)msdu->data; 1111 ether_addr_copy(da, eth->h_dest); 1112 ether_addr_copy(sa, eth->h_source); 1113 skb_pull(msdu, sizeof(struct ethhdr)); 1114 1115 /* push rfc1042/llc/snap */ 1116 memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042, 1117 sizeof(struct rfc1042_hdr)); 1118 1119 /* push original 802.11 header */ 1120 hdr = (struct ieee80211_hdr *)first_hdr; 1121 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1122 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); 1123 1124 /* original 802.11 header has a different DA and in 1125 * case of 4addr it may also have different SA 1126 */ 1127 hdr = (struct ieee80211_hdr *)msdu->data; 1128 ether_addr_copy(ieee80211_get_DA(hdr), da); 1129 ether_addr_copy(ieee80211_get_SA(hdr), sa); 1130 } 1131 1132 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar, 1133 struct sk_buff *msdu, 1134 struct ieee80211_rx_status *status, 1135 const u8 first_hdr[64]) 1136 { 1137 struct ieee80211_hdr *hdr; 1138 size_t hdr_len; 1139 1140 /* Delivered decapped frame: 1141 * [amsdu header] <-- replaced with 802.11 hdr 1142 * [rfc1042/llc] 1143 * [payload] 1144 */ 1145 1146 skb_pull(msdu, sizeof(struct amsdu_subframe_hdr)); 1147 1148 hdr = (struct ieee80211_hdr *)first_hdr; 1149 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1150 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len); 1151 } 1152 1153 static void ath10k_htt_rx_h_undecap(struct ath10k *ar, 1154 struct sk_buff *msdu, 1155 struct ieee80211_rx_status *status, 1156 u8 first_hdr[64], 1157 enum htt_rx_mpdu_encrypt_type enctype, 1158 bool is_decrypted) 1159 { 1160 struct htt_rx_desc *rxd; 1161 enum rx_msdu_decap_format decap; 1162 struct ieee80211_hdr *hdr; 1163 1164 /* First msdu's decapped header: 1165 * [802.11 header] <-- padded to 4 bytes long 1166 * [crypto param] <-- padded to 4 bytes long 1167 * [amsdu header] <-- only if A-MSDU 1168 * [rfc1042/llc] 1169 * 1170 * Other (2nd, 3rd, ..) msdu's decapped header: 1171 * [amsdu header] <-- only if A-MSDU 1172 * [rfc1042/llc] 1173 */ 1174 1175 rxd = (void *)msdu->data - sizeof(*rxd); 1176 hdr = (void *)rxd->rx_hdr_status; 1177 decap = MS(__le32_to_cpu(rxd->msdu_start.info1), 1178 RX_MSDU_START_INFO1_DECAP_FORMAT); 1179 1180 switch (decap) { 1181 case RX_MSDU_DECAP_RAW: 1182 ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype, 1183 is_decrypted); 1184 break; 1185 case RX_MSDU_DECAP_NATIVE_WIFI: 1186 ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr); 1187 break; 1188 case RX_MSDU_DECAP_ETHERNET2_DIX: 1189 ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype); 1190 break; 1191 case RX_MSDU_DECAP_8023_SNAP_LLC: 1192 ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr); 1193 break; 1194 } 1195 } 1196 1197 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb) 1198 { 1199 struct htt_rx_desc *rxd; 1200 u32 flags, info; 1201 bool is_ip4, is_ip6; 1202 bool is_tcp, is_udp; 1203 bool ip_csum_ok, tcpudp_csum_ok; 1204 1205 rxd = (void *)skb->data - sizeof(*rxd); 1206 flags = __le32_to_cpu(rxd->attention.flags); 1207 info = __le32_to_cpu(rxd->msdu_start.info1); 1208 1209 is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO); 1210 is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO); 1211 is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO); 1212 is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO); 1213 ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL); 1214 tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL); 1215 1216 if (!is_ip4 && !is_ip6) 1217 return CHECKSUM_NONE; 1218 if (!is_tcp && !is_udp) 1219 return CHECKSUM_NONE; 1220 if (!ip_csum_ok) 1221 return CHECKSUM_NONE; 1222 if (!tcpudp_csum_ok) 1223 return CHECKSUM_NONE; 1224 1225 return CHECKSUM_UNNECESSARY; 1226 } 1227 1228 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu) 1229 { 1230 msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu); 1231 } 1232 1233 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar, 1234 struct sk_buff_head *amsdu, 1235 struct ieee80211_rx_status *status) 1236 { 1237 struct sk_buff *first; 1238 struct sk_buff *last; 1239 struct sk_buff *msdu; 1240 struct htt_rx_desc *rxd; 1241 struct ieee80211_hdr *hdr; 1242 enum htt_rx_mpdu_encrypt_type enctype; 1243 u8 first_hdr[64]; 1244 u8 *qos; 1245 size_t hdr_len; 1246 bool has_fcs_err; 1247 bool has_crypto_err; 1248 bool has_tkip_err; 1249 bool has_peer_idx_invalid; 1250 bool is_decrypted; 1251 u32 attention; 1252 1253 if (skb_queue_empty(amsdu)) 1254 return; 1255 1256 first = skb_peek(amsdu); 1257 rxd = (void *)first->data - sizeof(*rxd); 1258 1259 enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0), 1260 RX_MPDU_START_INFO0_ENCRYPT_TYPE); 1261 1262 /* First MSDU's Rx descriptor in an A-MSDU contains full 802.11 1263 * decapped header. It'll be used for undecapping of each MSDU. 1264 */ 1265 hdr = (void *)rxd->rx_hdr_status; 1266 hdr_len = ieee80211_hdrlen(hdr->frame_control); 1267 memcpy(first_hdr, hdr, hdr_len); 1268 1269 /* Each A-MSDU subframe will use the original header as the base and be 1270 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl. 1271 */ 1272 hdr = (void *)first_hdr; 1273 qos = ieee80211_get_qos_ctl(hdr); 1274 qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1275 1276 /* Some attention flags are valid only in the last MSDU. */ 1277 last = skb_peek_tail(amsdu); 1278 rxd = (void *)last->data - sizeof(*rxd); 1279 attention = __le32_to_cpu(rxd->attention.flags); 1280 1281 has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR); 1282 has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR); 1283 has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR); 1284 has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID); 1285 1286 /* Note: If hardware captures an encrypted frame that it can't decrypt, 1287 * e.g. due to fcs error, missing peer or invalid key data it will 1288 * report the frame as raw. 1289 */ 1290 is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE && 1291 !has_fcs_err && 1292 !has_crypto_err && 1293 !has_peer_idx_invalid); 1294 1295 /* Clear per-MPDU flags while leaving per-PPDU flags intact. */ 1296 status->flag &= ~(RX_FLAG_FAILED_FCS_CRC | 1297 RX_FLAG_MMIC_ERROR | 1298 RX_FLAG_DECRYPTED | 1299 RX_FLAG_IV_STRIPPED | 1300 RX_FLAG_MMIC_STRIPPED); 1301 1302 if (has_fcs_err) 1303 status->flag |= RX_FLAG_FAILED_FCS_CRC; 1304 1305 if (has_tkip_err) 1306 status->flag |= RX_FLAG_MMIC_ERROR; 1307 1308 if (is_decrypted) 1309 status->flag |= RX_FLAG_DECRYPTED | 1310 RX_FLAG_IV_STRIPPED | 1311 RX_FLAG_MMIC_STRIPPED; 1312 1313 skb_queue_walk(amsdu, msdu) { 1314 ath10k_htt_rx_h_csum_offload(msdu); 1315 ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype, 1316 is_decrypted); 1317 1318 /* Undecapping involves copying the original 802.11 header back 1319 * to sk_buff. If frame is protected and hardware has decrypted 1320 * it then remove the protected bit. 1321 */ 1322 if (!is_decrypted) 1323 continue; 1324 1325 hdr = (void *)msdu->data; 1326 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1327 } 1328 } 1329 1330 static void ath10k_htt_rx_h_deliver(struct ath10k *ar, 1331 struct sk_buff_head *amsdu, 1332 struct ieee80211_rx_status *status) 1333 { 1334 struct sk_buff *msdu; 1335 1336 while ((msdu = __skb_dequeue(amsdu))) { 1337 /* Setup per-MSDU flags */ 1338 if (skb_queue_empty(amsdu)) 1339 status->flag &= ~RX_FLAG_AMSDU_MORE; 1340 else 1341 status->flag |= RX_FLAG_AMSDU_MORE; 1342 1343 ath10k_process_rx(ar, status, msdu); 1344 } 1345 } 1346 1347 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu) 1348 { 1349 struct sk_buff *skb, *first; 1350 int space; 1351 int total_len = 0; 1352 1353 /* TODO: Might could optimize this by using 1354 * skb_try_coalesce or similar method to 1355 * decrease copying, or maybe get mac80211 to 1356 * provide a way to just receive a list of 1357 * skb? 1358 */ 1359 1360 first = __skb_dequeue(amsdu); 1361 1362 /* Allocate total length all at once. */ 1363 skb_queue_walk(amsdu, skb) 1364 total_len += skb->len; 1365 1366 space = total_len - skb_tailroom(first); 1367 if ((space > 0) && 1368 (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) { 1369 /* TODO: bump some rx-oom error stat */ 1370 /* put it back together so we can free the 1371 * whole list at once. 1372 */ 1373 __skb_queue_head(amsdu, first); 1374 return -1; 1375 } 1376 1377 /* Walk list again, copying contents into 1378 * msdu_head 1379 */ 1380 while ((skb = __skb_dequeue(amsdu))) { 1381 skb_copy_from_linear_data(skb, skb_put(first, skb->len), 1382 skb->len); 1383 dev_kfree_skb_any(skb); 1384 } 1385 1386 __skb_queue_head(amsdu, first); 1387 return 0; 1388 } 1389 1390 static void ath10k_htt_rx_h_unchain(struct ath10k *ar, 1391 struct sk_buff_head *amsdu, 1392 bool chained) 1393 { 1394 struct sk_buff *first; 1395 struct htt_rx_desc *rxd; 1396 enum rx_msdu_decap_format decap; 1397 1398 first = skb_peek(amsdu); 1399 rxd = (void *)first->data - sizeof(*rxd); 1400 decap = MS(__le32_to_cpu(rxd->msdu_start.info1), 1401 RX_MSDU_START_INFO1_DECAP_FORMAT); 1402 1403 if (!chained) 1404 return; 1405 1406 /* FIXME: Current unchaining logic can only handle simple case of raw 1407 * msdu chaining. If decapping is other than raw the chaining may be 1408 * more complex and this isn't handled by the current code. Don't even 1409 * try re-constructing such frames - it'll be pretty much garbage. 1410 */ 1411 if (decap != RX_MSDU_DECAP_RAW || 1412 skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) { 1413 __skb_queue_purge(amsdu); 1414 return; 1415 } 1416 1417 ath10k_unchain_msdu(amsdu); 1418 } 1419 1420 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar, 1421 struct sk_buff_head *amsdu, 1422 struct ieee80211_rx_status *rx_status) 1423 { 1424 struct sk_buff *msdu; 1425 struct htt_rx_desc *rxd; 1426 bool is_mgmt; 1427 bool has_fcs_err; 1428 1429 msdu = skb_peek(amsdu); 1430 rxd = (void *)msdu->data - sizeof(*rxd); 1431 1432 /* FIXME: It might be a good idea to do some fuzzy-testing to drop 1433 * invalid/dangerous frames. 1434 */ 1435 1436 if (!rx_status->freq) { 1437 ath10k_warn(ar, "no channel configured; ignoring frame(s)!\n"); 1438 return false; 1439 } 1440 1441 is_mgmt = !!(rxd->attention.flags & 1442 __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE)); 1443 has_fcs_err = !!(rxd->attention.flags & 1444 __cpu_to_le32(RX_ATTENTION_FLAGS_FCS_ERR)); 1445 1446 /* Management frames are handled via WMI events. The pros of such 1447 * approach is that channel is explicitly provided in WMI events 1448 * whereas HTT doesn't provide channel information for Rxed frames. 1449 * 1450 * However some firmware revisions don't report corrupted frames via 1451 * WMI so don't drop them. 1452 */ 1453 if (is_mgmt && !has_fcs_err) { 1454 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n"); 1455 return false; 1456 } 1457 1458 if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) { 1459 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n"); 1460 return false; 1461 } 1462 1463 return true; 1464 } 1465 1466 static void ath10k_htt_rx_h_filter(struct ath10k *ar, 1467 struct sk_buff_head *amsdu, 1468 struct ieee80211_rx_status *rx_status) 1469 { 1470 if (skb_queue_empty(amsdu)) 1471 return; 1472 1473 if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status)) 1474 return; 1475 1476 __skb_queue_purge(amsdu); 1477 } 1478 1479 static void ath10k_htt_rx_handler(struct ath10k_htt *htt, 1480 struct htt_rx_indication *rx) 1481 { 1482 struct ath10k *ar = htt->ar; 1483 struct ieee80211_rx_status *rx_status = &htt->rx_status; 1484 struct htt_rx_indication_mpdu_range *mpdu_ranges; 1485 struct sk_buff_head amsdu; 1486 int num_mpdu_ranges; 1487 int fw_desc_len; 1488 u8 *fw_desc; 1489 int i, ret, mpdu_count = 0; 1490 1491 lockdep_assert_held(&htt->rx_ring.lock); 1492 1493 if (htt->rx_confused) 1494 return; 1495 1496 fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes); 1497 fw_desc = (u8 *)&rx->fw_desc; 1498 1499 num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1), 1500 HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES); 1501 mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx); 1502 1503 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ", 1504 rx, sizeof(*rx) + 1505 (sizeof(struct htt_rx_indication_mpdu_range) * 1506 num_mpdu_ranges)); 1507 1508 for (i = 0; i < num_mpdu_ranges; i++) 1509 mpdu_count += mpdu_ranges[i].mpdu_count; 1510 1511 while (mpdu_count--) { 1512 __skb_queue_head_init(&amsdu); 1513 ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, 1514 &fw_desc_len, &amsdu); 1515 if (ret < 0) { 1516 ath10k_warn(ar, "rx ring became corrupted: %d\n", ret); 1517 __skb_queue_purge(&amsdu); 1518 /* FIXME: It's probably a good idea to reboot the 1519 * device instead of leaving it inoperable. 1520 */ 1521 htt->rx_confused = true; 1522 break; 1523 } 1524 1525 ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status); 1526 ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0); 1527 ath10k_htt_rx_h_filter(ar, &amsdu, rx_status); 1528 ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status); 1529 ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status); 1530 } 1531 1532 tasklet_schedule(&htt->rx_replenish_task); 1533 } 1534 1535 static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt, 1536 struct htt_rx_fragment_indication *frag) 1537 { 1538 struct ath10k *ar = htt->ar; 1539 struct ieee80211_rx_status *rx_status = &htt->rx_status; 1540 struct sk_buff_head amsdu; 1541 int ret; 1542 u8 *fw_desc; 1543 int fw_desc_len; 1544 1545 fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes); 1546 fw_desc = (u8 *)frag->fw_msdu_rx_desc; 1547 1548 __skb_queue_head_init(&amsdu); 1549 1550 spin_lock_bh(&htt->rx_ring.lock); 1551 ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len, 1552 &amsdu); 1553 spin_unlock_bh(&htt->rx_ring.lock); 1554 1555 tasklet_schedule(&htt->rx_replenish_task); 1556 1557 ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n"); 1558 1559 if (ret) { 1560 ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n", 1561 ret); 1562 __skb_queue_purge(&amsdu); 1563 return; 1564 } 1565 1566 if (skb_queue_len(&amsdu) != 1) { 1567 ath10k_warn(ar, "failed to pop frag amsdu: too many msdus\n"); 1568 __skb_queue_purge(&amsdu); 1569 return; 1570 } 1571 1572 ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status); 1573 ath10k_htt_rx_h_filter(ar, &amsdu, rx_status); 1574 ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status); 1575 ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status); 1576 1577 if (fw_desc_len > 0) { 1578 ath10k_dbg(ar, ATH10K_DBG_HTT, 1579 "expecting more fragmented rx in one indication %d\n", 1580 fw_desc_len); 1581 } 1582 } 1583 1584 static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar, 1585 struct sk_buff *skb) 1586 { 1587 struct ath10k_htt *htt = &ar->htt; 1588 struct htt_resp *resp = (struct htt_resp *)skb->data; 1589 struct htt_tx_done tx_done = {}; 1590 int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS); 1591 __le16 msdu_id; 1592 int i; 1593 1594 lockdep_assert_held(&htt->tx_lock); 1595 1596 switch (status) { 1597 case HTT_DATA_TX_STATUS_NO_ACK: 1598 tx_done.no_ack = true; 1599 break; 1600 case HTT_DATA_TX_STATUS_OK: 1601 break; 1602 case HTT_DATA_TX_STATUS_DISCARD: 1603 case HTT_DATA_TX_STATUS_POSTPONE: 1604 case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL: 1605 tx_done.discard = true; 1606 break; 1607 default: 1608 ath10k_warn(ar, "unhandled tx completion status %d\n", status); 1609 tx_done.discard = true; 1610 break; 1611 } 1612 1613 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n", 1614 resp->data_tx_completion.num_msdus); 1615 1616 for (i = 0; i < resp->data_tx_completion.num_msdus; i++) { 1617 msdu_id = resp->data_tx_completion.msdus[i]; 1618 tx_done.msdu_id = __le16_to_cpu(msdu_id); 1619 ath10k_txrx_tx_unref(htt, &tx_done); 1620 } 1621 } 1622 1623 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp) 1624 { 1625 struct htt_rx_addba *ev = &resp->rx_addba; 1626 struct ath10k_peer *peer; 1627 struct ath10k_vif *arvif; 1628 u16 info0, tid, peer_id; 1629 1630 info0 = __le16_to_cpu(ev->info0); 1631 tid = MS(info0, HTT_RX_BA_INFO0_TID); 1632 peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID); 1633 1634 ath10k_dbg(ar, ATH10K_DBG_HTT, 1635 "htt rx addba tid %hu peer_id %hu size %hhu\n", 1636 tid, peer_id, ev->window_size); 1637 1638 spin_lock_bh(&ar->data_lock); 1639 peer = ath10k_peer_find_by_id(ar, peer_id); 1640 if (!peer) { 1641 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n", 1642 peer_id); 1643 spin_unlock_bh(&ar->data_lock); 1644 return; 1645 } 1646 1647 arvif = ath10k_get_arvif(ar, peer->vdev_id); 1648 if (!arvif) { 1649 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n", 1650 peer->vdev_id); 1651 spin_unlock_bh(&ar->data_lock); 1652 return; 1653 } 1654 1655 ath10k_dbg(ar, ATH10K_DBG_HTT, 1656 "htt rx start rx ba session sta %pM tid %hu size %hhu\n", 1657 peer->addr, tid, ev->window_size); 1658 1659 ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid); 1660 spin_unlock_bh(&ar->data_lock); 1661 } 1662 1663 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp) 1664 { 1665 struct htt_rx_delba *ev = &resp->rx_delba; 1666 struct ath10k_peer *peer; 1667 struct ath10k_vif *arvif; 1668 u16 info0, tid, peer_id; 1669 1670 info0 = __le16_to_cpu(ev->info0); 1671 tid = MS(info0, HTT_RX_BA_INFO0_TID); 1672 peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID); 1673 1674 ath10k_dbg(ar, ATH10K_DBG_HTT, 1675 "htt rx delba tid %hu peer_id %hu\n", 1676 tid, peer_id); 1677 1678 spin_lock_bh(&ar->data_lock); 1679 peer = ath10k_peer_find_by_id(ar, peer_id); 1680 if (!peer) { 1681 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n", 1682 peer_id); 1683 spin_unlock_bh(&ar->data_lock); 1684 return; 1685 } 1686 1687 arvif = ath10k_get_arvif(ar, peer->vdev_id); 1688 if (!arvif) { 1689 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n", 1690 peer->vdev_id); 1691 spin_unlock_bh(&ar->data_lock); 1692 return; 1693 } 1694 1695 ath10k_dbg(ar, ATH10K_DBG_HTT, 1696 "htt rx stop rx ba session sta %pM tid %hu\n", 1697 peer->addr, tid); 1698 1699 ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid); 1700 spin_unlock_bh(&ar->data_lock); 1701 } 1702 1703 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list, 1704 struct sk_buff_head *amsdu) 1705 { 1706 struct sk_buff *msdu; 1707 struct htt_rx_desc *rxd; 1708 1709 if (skb_queue_empty(list)) 1710 return -ENOBUFS; 1711 1712 if (WARN_ON(!skb_queue_empty(amsdu))) 1713 return -EINVAL; 1714 1715 while ((msdu = __skb_dequeue(list))) { 1716 __skb_queue_tail(amsdu, msdu); 1717 1718 rxd = (void *)msdu->data - sizeof(*rxd); 1719 if (rxd->msdu_end.info0 & 1720 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU)) 1721 break; 1722 } 1723 1724 msdu = skb_peek_tail(amsdu); 1725 rxd = (void *)msdu->data - sizeof(*rxd); 1726 if (!(rxd->msdu_end.info0 & 1727 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) { 1728 skb_queue_splice_init(amsdu, list); 1729 return -EAGAIN; 1730 } 1731 1732 return 0; 1733 } 1734 1735 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status, 1736 struct sk_buff *skb) 1737 { 1738 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1739 1740 if (!ieee80211_has_protected(hdr->frame_control)) 1741 return; 1742 1743 /* Offloaded frames are already decrypted but firmware insists they are 1744 * protected in the 802.11 header. Strip the flag. Otherwise mac80211 1745 * will drop the frame. 1746 */ 1747 1748 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1749 status->flag |= RX_FLAG_DECRYPTED | 1750 RX_FLAG_IV_STRIPPED | 1751 RX_FLAG_MMIC_STRIPPED; 1752 } 1753 1754 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar, 1755 struct sk_buff_head *list) 1756 { 1757 struct ath10k_htt *htt = &ar->htt; 1758 struct ieee80211_rx_status *status = &htt->rx_status; 1759 struct htt_rx_offload_msdu *rx; 1760 struct sk_buff *msdu; 1761 size_t offset; 1762 1763 while ((msdu = __skb_dequeue(list))) { 1764 /* Offloaded frames don't have Rx descriptor. Instead they have 1765 * a short meta information header. 1766 */ 1767 1768 rx = (void *)msdu->data; 1769 1770 skb_put(msdu, sizeof(*rx)); 1771 skb_pull(msdu, sizeof(*rx)); 1772 1773 if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) { 1774 ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n"); 1775 dev_kfree_skb_any(msdu); 1776 continue; 1777 } 1778 1779 skb_put(msdu, __le16_to_cpu(rx->msdu_len)); 1780 1781 /* Offloaded rx header length isn't multiple of 2 nor 4 so the 1782 * actual payload is unaligned. Align the frame. Otherwise 1783 * mac80211 complains. This shouldn't reduce performance much 1784 * because these offloaded frames are rare. 1785 */ 1786 offset = 4 - ((unsigned long)msdu->data & 3); 1787 skb_put(msdu, offset); 1788 memmove(msdu->data + offset, msdu->data, msdu->len); 1789 skb_pull(msdu, offset); 1790 1791 /* FIXME: The frame is NWifi. Re-construct QoS Control 1792 * if possible later. 1793 */ 1794 1795 memset(status, 0, sizeof(*status)); 1796 status->flag |= RX_FLAG_NO_SIGNAL_VAL; 1797 1798 ath10k_htt_rx_h_rx_offload_prot(status, msdu); 1799 ath10k_htt_rx_h_channel(ar, status); 1800 ath10k_process_rx(ar, status, msdu); 1801 } 1802 } 1803 1804 static void ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb) 1805 { 1806 struct ath10k_htt *htt = &ar->htt; 1807 struct htt_resp *resp = (void *)skb->data; 1808 struct ieee80211_rx_status *status = &htt->rx_status; 1809 struct sk_buff_head list; 1810 struct sk_buff_head amsdu; 1811 u16 peer_id; 1812 u16 msdu_count; 1813 u8 vdev_id; 1814 u8 tid; 1815 bool offload; 1816 bool frag; 1817 int ret; 1818 1819 lockdep_assert_held(&htt->rx_ring.lock); 1820 1821 if (htt->rx_confused) 1822 return; 1823 1824 skb_pull(skb, sizeof(resp->hdr)); 1825 skb_pull(skb, sizeof(resp->rx_in_ord_ind)); 1826 1827 peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id); 1828 msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count); 1829 vdev_id = resp->rx_in_ord_ind.vdev_id; 1830 tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID); 1831 offload = !!(resp->rx_in_ord_ind.info & 1832 HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK); 1833 frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK); 1834 1835 ath10k_dbg(ar, ATH10K_DBG_HTT, 1836 "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n", 1837 vdev_id, peer_id, tid, offload, frag, msdu_count); 1838 1839 if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs)) { 1840 ath10k_warn(ar, "dropping invalid in order rx indication\n"); 1841 return; 1842 } 1843 1844 /* The event can deliver more than 1 A-MSDU. Each A-MSDU is later 1845 * extracted and processed. 1846 */ 1847 __skb_queue_head_init(&list); 1848 ret = ath10k_htt_rx_pop_paddr_list(htt, &resp->rx_in_ord_ind, &list); 1849 if (ret < 0) { 1850 ath10k_warn(ar, "failed to pop paddr list: %d\n", ret); 1851 htt->rx_confused = true; 1852 return; 1853 } 1854 1855 /* Offloaded frames are very different and need to be handled 1856 * separately. 1857 */ 1858 if (offload) 1859 ath10k_htt_rx_h_rx_offload(ar, &list); 1860 1861 while (!skb_queue_empty(&list)) { 1862 __skb_queue_head_init(&amsdu); 1863 ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu); 1864 switch (ret) { 1865 case 0: 1866 /* Note: The in-order indication may report interleaved 1867 * frames from different PPDUs meaning reported rx rate 1868 * to mac80211 isn't accurate/reliable. It's still 1869 * better to report something than nothing though. This 1870 * should still give an idea about rx rate to the user. 1871 */ 1872 ath10k_htt_rx_h_ppdu(ar, &amsdu, status); 1873 ath10k_htt_rx_h_filter(ar, &amsdu, status); 1874 ath10k_htt_rx_h_mpdu(ar, &amsdu, status); 1875 ath10k_htt_rx_h_deliver(ar, &amsdu, status); 1876 break; 1877 case -EAGAIN: 1878 /* fall through */ 1879 default: 1880 /* Should not happen. */ 1881 ath10k_warn(ar, "failed to extract amsdu: %d\n", ret); 1882 htt->rx_confused = true; 1883 __skb_queue_purge(&list); 1884 return; 1885 } 1886 } 1887 1888 tasklet_schedule(&htt->rx_replenish_task); 1889 } 1890 1891 void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb) 1892 { 1893 struct ath10k_htt *htt = &ar->htt; 1894 struct htt_resp *resp = (struct htt_resp *)skb->data; 1895 1896 /* confirm alignment */ 1897 if (!IS_ALIGNED((unsigned long)skb->data, 4)) 1898 ath10k_warn(ar, "unaligned htt message, expect trouble\n"); 1899 1900 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n", 1901 resp->hdr.msg_type); 1902 switch (resp->hdr.msg_type) { 1903 case HTT_T2H_MSG_TYPE_VERSION_CONF: { 1904 htt->target_version_major = resp->ver_resp.major; 1905 htt->target_version_minor = resp->ver_resp.minor; 1906 complete(&htt->target_version_received); 1907 break; 1908 } 1909 case HTT_T2H_MSG_TYPE_RX_IND: 1910 spin_lock_bh(&htt->rx_ring.lock); 1911 __skb_queue_tail(&htt->rx_compl_q, skb); 1912 spin_unlock_bh(&htt->rx_ring.lock); 1913 tasklet_schedule(&htt->txrx_compl_task); 1914 return; 1915 case HTT_T2H_MSG_TYPE_PEER_MAP: { 1916 struct htt_peer_map_event ev = { 1917 .vdev_id = resp->peer_map.vdev_id, 1918 .peer_id = __le16_to_cpu(resp->peer_map.peer_id), 1919 }; 1920 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr)); 1921 ath10k_peer_map_event(htt, &ev); 1922 break; 1923 } 1924 case HTT_T2H_MSG_TYPE_PEER_UNMAP: { 1925 struct htt_peer_unmap_event ev = { 1926 .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id), 1927 }; 1928 ath10k_peer_unmap_event(htt, &ev); 1929 break; 1930 } 1931 case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: { 1932 struct htt_tx_done tx_done = {}; 1933 int status = __le32_to_cpu(resp->mgmt_tx_completion.status); 1934 1935 tx_done.msdu_id = 1936 __le32_to_cpu(resp->mgmt_tx_completion.desc_id); 1937 1938 switch (status) { 1939 case HTT_MGMT_TX_STATUS_OK: 1940 break; 1941 case HTT_MGMT_TX_STATUS_RETRY: 1942 tx_done.no_ack = true; 1943 break; 1944 case HTT_MGMT_TX_STATUS_DROP: 1945 tx_done.discard = true; 1946 break; 1947 } 1948 1949 spin_lock_bh(&htt->tx_lock); 1950 ath10k_txrx_tx_unref(htt, &tx_done); 1951 spin_unlock_bh(&htt->tx_lock); 1952 break; 1953 } 1954 case HTT_T2H_MSG_TYPE_TX_COMPL_IND: 1955 spin_lock_bh(&htt->tx_lock); 1956 __skb_queue_tail(&htt->tx_compl_q, skb); 1957 spin_unlock_bh(&htt->tx_lock); 1958 tasklet_schedule(&htt->txrx_compl_task); 1959 return; 1960 case HTT_T2H_MSG_TYPE_SEC_IND: { 1961 struct ath10k *ar = htt->ar; 1962 struct htt_security_indication *ev = &resp->security_indication; 1963 1964 ath10k_dbg(ar, ATH10K_DBG_HTT, 1965 "sec ind peer_id %d unicast %d type %d\n", 1966 __le16_to_cpu(ev->peer_id), 1967 !!(ev->flags & HTT_SECURITY_IS_UNICAST), 1968 MS(ev->flags, HTT_SECURITY_TYPE)); 1969 complete(&ar->install_key_done); 1970 break; 1971 } 1972 case HTT_T2H_MSG_TYPE_RX_FRAG_IND: { 1973 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ", 1974 skb->data, skb->len); 1975 ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind); 1976 break; 1977 } 1978 case HTT_T2H_MSG_TYPE_TEST: 1979 /* FIX THIS */ 1980 break; 1981 case HTT_T2H_MSG_TYPE_STATS_CONF: 1982 trace_ath10k_htt_stats(ar, skb->data, skb->len); 1983 break; 1984 case HTT_T2H_MSG_TYPE_TX_INSPECT_IND: 1985 /* Firmware can return tx frames if it's unable to fully 1986 * process them and suspects host may be able to fix it. ath10k 1987 * sends all tx frames as already inspected so this shouldn't 1988 * happen unless fw has a bug. 1989 */ 1990 ath10k_warn(ar, "received an unexpected htt tx inspect event\n"); 1991 break; 1992 case HTT_T2H_MSG_TYPE_RX_ADDBA: 1993 ath10k_htt_rx_addba(ar, resp); 1994 break; 1995 case HTT_T2H_MSG_TYPE_RX_DELBA: 1996 ath10k_htt_rx_delba(ar, resp); 1997 break; 1998 case HTT_T2H_MSG_TYPE_PKTLOG: { 1999 struct ath10k_pktlog_hdr *hdr = 2000 (struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload; 2001 2002 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload, 2003 sizeof(*hdr) + 2004 __le16_to_cpu(hdr->size)); 2005 break; 2006 } 2007 case HTT_T2H_MSG_TYPE_RX_FLUSH: { 2008 /* Ignore this event because mac80211 takes care of Rx 2009 * aggregation reordering. 2010 */ 2011 break; 2012 } 2013 case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: { 2014 spin_lock_bh(&htt->rx_ring.lock); 2015 __skb_queue_tail(&htt->rx_in_ord_compl_q, skb); 2016 spin_unlock_bh(&htt->rx_ring.lock); 2017 tasklet_schedule(&htt->txrx_compl_task); 2018 return; 2019 } 2020 case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND: 2021 /* FIXME: This WMI-TLV event is overlapping with 10.2 2022 * CHAN_CHANGE - both being 0xF. Neither is being used in 2023 * practice so no immediate action is necessary. Nevertheless 2024 * HTT may need an abstraction layer like WMI has one day. 2025 */ 2026 break; 2027 default: 2028 ath10k_warn(ar, "htt event (%d) not handled\n", 2029 resp->hdr.msg_type); 2030 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ", 2031 skb->data, skb->len); 2032 break; 2033 }; 2034 2035 /* Free the indication buffer */ 2036 dev_kfree_skb_any(skb); 2037 } 2038 2039 static void ath10k_htt_txrx_compl_task(unsigned long ptr) 2040 { 2041 struct ath10k_htt *htt = (struct ath10k_htt *)ptr; 2042 struct ath10k *ar = htt->ar; 2043 struct htt_resp *resp; 2044 struct sk_buff *skb; 2045 2046 spin_lock_bh(&htt->tx_lock); 2047 while ((skb = __skb_dequeue(&htt->tx_compl_q))) { 2048 ath10k_htt_rx_frm_tx_compl(htt->ar, skb); 2049 dev_kfree_skb_any(skb); 2050 } 2051 spin_unlock_bh(&htt->tx_lock); 2052 2053 spin_lock_bh(&htt->rx_ring.lock); 2054 while ((skb = __skb_dequeue(&htt->rx_compl_q))) { 2055 resp = (struct htt_resp *)skb->data; 2056 ath10k_htt_rx_handler(htt, &resp->rx_ind); 2057 dev_kfree_skb_any(skb); 2058 } 2059 2060 while ((skb = __skb_dequeue(&htt->rx_in_ord_compl_q))) { 2061 ath10k_htt_rx_in_ord_ind(ar, skb); 2062 dev_kfree_skb_any(skb); 2063 } 2064 spin_unlock_bh(&htt->rx_ring.lock); 2065 } 2066