1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (c) 2005-2011 Atheros Communications Inc.
4  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
5  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
6  */
7 
8 #include "core.h"
9 #include "htc.h"
10 #include "htt.h"
11 #include "txrx.h"
12 #include "debug.h"
13 #include "trace.h"
14 #include "mac.h"
15 
16 #include <linux/log2.h>
17 #include <linux/bitfield.h>
18 
19 /* when under memory pressure rx ring refill may fail and needs a retry */
20 #define HTT_RX_RING_REFILL_RETRY_MS 50
21 
22 #define HTT_RX_RING_REFILL_RESCHED_MS 5
23 
24 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
25 
26 static struct sk_buff *
27 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u64 paddr)
28 {
29 	struct ath10k_skb_rxcb *rxcb;
30 
31 	hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
32 		if (rxcb->paddr == paddr)
33 			return ATH10K_RXCB_SKB(rxcb);
34 
35 	WARN_ON_ONCE(1);
36 	return NULL;
37 }
38 
39 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
40 {
41 	struct sk_buff *skb;
42 	struct ath10k_skb_rxcb *rxcb;
43 	struct hlist_node *n;
44 	int i;
45 
46 	if (htt->rx_ring.in_ord_rx) {
47 		hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
48 			skb = ATH10K_RXCB_SKB(rxcb);
49 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
50 					 skb->len + skb_tailroom(skb),
51 					 DMA_FROM_DEVICE);
52 			hash_del(&rxcb->hlist);
53 			dev_kfree_skb_any(skb);
54 		}
55 	} else {
56 		for (i = 0; i < htt->rx_ring.size; i++) {
57 			skb = htt->rx_ring.netbufs_ring[i];
58 			if (!skb)
59 				continue;
60 
61 			rxcb = ATH10K_SKB_RXCB(skb);
62 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
63 					 skb->len + skb_tailroom(skb),
64 					 DMA_FROM_DEVICE);
65 			dev_kfree_skb_any(skb);
66 		}
67 	}
68 
69 	htt->rx_ring.fill_cnt = 0;
70 	hash_init(htt->rx_ring.skb_table);
71 	memset(htt->rx_ring.netbufs_ring, 0,
72 	       htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
73 }
74 
75 static size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
76 {
77 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
78 }
79 
80 static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
81 {
82 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
83 }
84 
85 static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
86 					     void *vaddr)
87 {
88 	htt->rx_ring.paddrs_ring_32 = vaddr;
89 }
90 
91 static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
92 					     void *vaddr)
93 {
94 	htt->rx_ring.paddrs_ring_64 = vaddr;
95 }
96 
97 static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
98 					  dma_addr_t paddr, int idx)
99 {
100 	htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
101 }
102 
103 static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
104 					  dma_addr_t paddr, int idx)
105 {
106 	htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
107 }
108 
109 static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
110 {
111 	htt->rx_ring.paddrs_ring_32[idx] = 0;
112 }
113 
114 static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
115 {
116 	htt->rx_ring.paddrs_ring_64[idx] = 0;
117 }
118 
119 static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
120 {
121 	return (void *)htt->rx_ring.paddrs_ring_32;
122 }
123 
124 static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
125 {
126 	return (void *)htt->rx_ring.paddrs_ring_64;
127 }
128 
129 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
130 {
131 	struct htt_rx_desc *rx_desc;
132 	struct ath10k_skb_rxcb *rxcb;
133 	struct sk_buff *skb;
134 	dma_addr_t paddr;
135 	int ret = 0, idx;
136 
137 	/* The Full Rx Reorder firmware has no way of telling the host
138 	 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
139 	 * To keep things simple make sure ring is always half empty. This
140 	 * guarantees there'll be no replenishment overruns possible.
141 	 */
142 	BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
143 
144 	idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
145 	while (num > 0) {
146 		skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
147 		if (!skb) {
148 			ret = -ENOMEM;
149 			goto fail;
150 		}
151 
152 		if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
153 			skb_pull(skb,
154 				 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
155 				 skb->data);
156 
157 		/* Clear rx_desc attention word before posting to Rx ring */
158 		rx_desc = (struct htt_rx_desc *)skb->data;
159 		rx_desc->attention.flags = __cpu_to_le32(0);
160 
161 		paddr = dma_map_single(htt->ar->dev, skb->data,
162 				       skb->len + skb_tailroom(skb),
163 				       DMA_FROM_DEVICE);
164 
165 		if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
166 			dev_kfree_skb_any(skb);
167 			ret = -ENOMEM;
168 			goto fail;
169 		}
170 
171 		rxcb = ATH10K_SKB_RXCB(skb);
172 		rxcb->paddr = paddr;
173 		htt->rx_ring.netbufs_ring[idx] = skb;
174 		ath10k_htt_set_paddrs_ring(htt, paddr, idx);
175 		htt->rx_ring.fill_cnt++;
176 
177 		if (htt->rx_ring.in_ord_rx) {
178 			hash_add(htt->rx_ring.skb_table,
179 				 &ATH10K_SKB_RXCB(skb)->hlist,
180 				 paddr);
181 		}
182 
183 		num--;
184 		idx++;
185 		idx &= htt->rx_ring.size_mask;
186 	}
187 
188 fail:
189 	/*
190 	 * Make sure the rx buffer is updated before available buffer
191 	 * index to avoid any potential rx ring corruption.
192 	 */
193 	mb();
194 	*htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
195 	return ret;
196 }
197 
198 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
199 {
200 	lockdep_assert_held(&htt->rx_ring.lock);
201 	return __ath10k_htt_rx_ring_fill_n(htt, num);
202 }
203 
204 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
205 {
206 	int ret, num_deficit, num_to_fill;
207 
208 	/* Refilling the whole RX ring buffer proves to be a bad idea. The
209 	 * reason is RX may take up significant amount of CPU cycles and starve
210 	 * other tasks, e.g. TX on an ethernet device while acting as a bridge
211 	 * with ath10k wlan interface. This ended up with very poor performance
212 	 * once CPU the host system was overwhelmed with RX on ath10k.
213 	 *
214 	 * By limiting the number of refills the replenishing occurs
215 	 * progressively. This in turns makes use of the fact tasklets are
216 	 * processed in FIFO order. This means actual RX processing can starve
217 	 * out refilling. If there's not enough buffers on RX ring FW will not
218 	 * report RX until it is refilled with enough buffers. This
219 	 * automatically balances load wrt to CPU power.
220 	 *
221 	 * This probably comes at a cost of lower maximum throughput but
222 	 * improves the average and stability.
223 	 */
224 	spin_lock_bh(&htt->rx_ring.lock);
225 	num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
226 	num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
227 	num_deficit -= num_to_fill;
228 	ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
229 	if (ret == -ENOMEM) {
230 		/*
231 		 * Failed to fill it to the desired level -
232 		 * we'll start a timer and try again next time.
233 		 * As long as enough buffers are left in the ring for
234 		 * another A-MPDU rx, no special recovery is needed.
235 		 */
236 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
237 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
238 	} else if (num_deficit > 0) {
239 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
240 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
241 	}
242 	spin_unlock_bh(&htt->rx_ring.lock);
243 }
244 
245 static void ath10k_htt_rx_ring_refill_retry(struct timer_list *t)
246 {
247 	struct ath10k_htt *htt = from_timer(htt, t, rx_ring.refill_retry_timer);
248 
249 	ath10k_htt_rx_msdu_buff_replenish(htt);
250 }
251 
252 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
253 {
254 	struct ath10k_htt *htt = &ar->htt;
255 	int ret;
256 
257 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
258 		return 0;
259 
260 	spin_lock_bh(&htt->rx_ring.lock);
261 	ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
262 					      htt->rx_ring.fill_cnt));
263 
264 	if (ret)
265 		ath10k_htt_rx_ring_free(htt);
266 
267 	spin_unlock_bh(&htt->rx_ring.lock);
268 
269 	return ret;
270 }
271 
272 void ath10k_htt_rx_free(struct ath10k_htt *htt)
273 {
274 	if (htt->ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
275 		return;
276 
277 	del_timer_sync(&htt->rx_ring.refill_retry_timer);
278 
279 	skb_queue_purge(&htt->rx_msdus_q);
280 	skb_queue_purge(&htt->rx_in_ord_compl_q);
281 	skb_queue_purge(&htt->tx_fetch_ind_q);
282 
283 	spin_lock_bh(&htt->rx_ring.lock);
284 	ath10k_htt_rx_ring_free(htt);
285 	spin_unlock_bh(&htt->rx_ring.lock);
286 
287 	dma_free_coherent(htt->ar->dev,
288 			  ath10k_htt_get_rx_ring_size(htt),
289 			  ath10k_htt_get_vaddr_ring(htt),
290 			  htt->rx_ring.base_paddr);
291 
292 	dma_free_coherent(htt->ar->dev,
293 			  sizeof(*htt->rx_ring.alloc_idx.vaddr),
294 			  htt->rx_ring.alloc_idx.vaddr,
295 			  htt->rx_ring.alloc_idx.paddr);
296 
297 	kfree(htt->rx_ring.netbufs_ring);
298 }
299 
300 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
301 {
302 	struct ath10k *ar = htt->ar;
303 	int idx;
304 	struct sk_buff *msdu;
305 
306 	lockdep_assert_held(&htt->rx_ring.lock);
307 
308 	if (htt->rx_ring.fill_cnt == 0) {
309 		ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
310 		return NULL;
311 	}
312 
313 	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
314 	msdu = htt->rx_ring.netbufs_ring[idx];
315 	htt->rx_ring.netbufs_ring[idx] = NULL;
316 	ath10k_htt_reset_paddrs_ring(htt, idx);
317 
318 	idx++;
319 	idx &= htt->rx_ring.size_mask;
320 	htt->rx_ring.sw_rd_idx.msdu_payld = idx;
321 	htt->rx_ring.fill_cnt--;
322 
323 	dma_unmap_single(htt->ar->dev,
324 			 ATH10K_SKB_RXCB(msdu)->paddr,
325 			 msdu->len + skb_tailroom(msdu),
326 			 DMA_FROM_DEVICE);
327 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
328 			msdu->data, msdu->len + skb_tailroom(msdu));
329 
330 	return msdu;
331 }
332 
333 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
334 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
335 				   struct sk_buff_head *amsdu)
336 {
337 	struct ath10k *ar = htt->ar;
338 	int msdu_len, msdu_chaining = 0;
339 	struct sk_buff *msdu;
340 	struct htt_rx_desc *rx_desc;
341 
342 	lockdep_assert_held(&htt->rx_ring.lock);
343 
344 	for (;;) {
345 		int last_msdu, msdu_len_invalid, msdu_chained;
346 
347 		msdu = ath10k_htt_rx_netbuf_pop(htt);
348 		if (!msdu) {
349 			__skb_queue_purge(amsdu);
350 			return -ENOENT;
351 		}
352 
353 		__skb_queue_tail(amsdu, msdu);
354 
355 		rx_desc = (struct htt_rx_desc *)msdu->data;
356 
357 		/* FIXME: we must report msdu payload since this is what caller
358 		 * expects now
359 		 */
360 		skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
361 		skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
362 
363 		/*
364 		 * Sanity check - confirm the HW is finished filling in the
365 		 * rx data.
366 		 * If the HW and SW are working correctly, then it's guaranteed
367 		 * that the HW's MAC DMA is done before this point in the SW.
368 		 * To prevent the case that we handle a stale Rx descriptor,
369 		 * just assert for now until we have a way to recover.
370 		 */
371 		if (!(__le32_to_cpu(rx_desc->attention.flags)
372 				& RX_ATTENTION_FLAGS_MSDU_DONE)) {
373 			__skb_queue_purge(amsdu);
374 			return -EIO;
375 		}
376 
377 		msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
378 					& (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
379 					   RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
380 		msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
381 			      RX_MSDU_START_INFO0_MSDU_LENGTH);
382 		msdu_chained = rx_desc->frag_info.ring2_more_count;
383 
384 		if (msdu_len_invalid)
385 			msdu_len = 0;
386 
387 		skb_trim(msdu, 0);
388 		skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
389 		msdu_len -= msdu->len;
390 
391 		/* Note: Chained buffers do not contain rx descriptor */
392 		while (msdu_chained--) {
393 			msdu = ath10k_htt_rx_netbuf_pop(htt);
394 			if (!msdu) {
395 				__skb_queue_purge(amsdu);
396 				return -ENOENT;
397 			}
398 
399 			__skb_queue_tail(amsdu, msdu);
400 			skb_trim(msdu, 0);
401 			skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
402 			msdu_len -= msdu->len;
403 			msdu_chaining = 1;
404 		}
405 
406 		last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
407 				RX_MSDU_END_INFO0_LAST_MSDU;
408 
409 		trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
410 					 sizeof(*rx_desc) - sizeof(u32));
411 
412 		if (last_msdu)
413 			break;
414 	}
415 
416 	if (skb_queue_empty(amsdu))
417 		msdu_chaining = -1;
418 
419 	/*
420 	 * Don't refill the ring yet.
421 	 *
422 	 * First, the elements popped here are still in use - it is not
423 	 * safe to overwrite them until the matching call to
424 	 * mpdu_desc_list_next. Second, for efficiency it is preferable to
425 	 * refill the rx ring with 1 PPDU's worth of rx buffers (something
426 	 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
427 	 * (something like 3 buffers). Consequently, we'll rely on the txrx
428 	 * SW to tell us when it is done pulling all the PPDU's rx buffers
429 	 * out of the rx ring, and then refill it just once.
430 	 */
431 
432 	return msdu_chaining;
433 }
434 
435 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
436 					       u64 paddr)
437 {
438 	struct ath10k *ar = htt->ar;
439 	struct ath10k_skb_rxcb *rxcb;
440 	struct sk_buff *msdu;
441 
442 	lockdep_assert_held(&htt->rx_ring.lock);
443 
444 	msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
445 	if (!msdu)
446 		return NULL;
447 
448 	rxcb = ATH10K_SKB_RXCB(msdu);
449 	hash_del(&rxcb->hlist);
450 	htt->rx_ring.fill_cnt--;
451 
452 	dma_unmap_single(htt->ar->dev, rxcb->paddr,
453 			 msdu->len + skb_tailroom(msdu),
454 			 DMA_FROM_DEVICE);
455 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
456 			msdu->data, msdu->len + skb_tailroom(msdu));
457 
458 	return msdu;
459 }
460 
461 static inline void ath10k_htt_append_frag_list(struct sk_buff *skb_head,
462 					       struct sk_buff *frag_list,
463 					       unsigned int frag_len)
464 {
465 	skb_shinfo(skb_head)->frag_list = frag_list;
466 	skb_head->data_len = frag_len;
467 	skb_head->len += skb_head->data_len;
468 }
469 
470 static int ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt *htt,
471 					     struct sk_buff *msdu,
472 					     struct htt_rx_in_ord_msdu_desc **msdu_desc)
473 {
474 	struct ath10k *ar = htt->ar;
475 	u32 paddr;
476 	struct sk_buff *frag_buf;
477 	struct sk_buff *prev_frag_buf;
478 	u8 last_frag;
479 	struct htt_rx_in_ord_msdu_desc *ind_desc = *msdu_desc;
480 	struct htt_rx_desc *rxd;
481 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
482 
483 	rxd = (void *)msdu->data;
484 	trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
485 
486 	skb_put(msdu, sizeof(struct htt_rx_desc));
487 	skb_pull(msdu, sizeof(struct htt_rx_desc));
488 	skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
489 	amsdu_len -= msdu->len;
490 
491 	last_frag = ind_desc->reserved;
492 	if (last_frag) {
493 		if (amsdu_len) {
494 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
495 				    __le16_to_cpu(ind_desc->msdu_len),
496 				    amsdu_len);
497 		}
498 		return 0;
499 	}
500 
501 	ind_desc++;
502 	paddr = __le32_to_cpu(ind_desc->msdu_paddr);
503 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
504 	if (!frag_buf) {
505 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%x", paddr);
506 		return -ENOENT;
507 	}
508 
509 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
510 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
511 
512 	amsdu_len -= frag_buf->len;
513 	prev_frag_buf = frag_buf;
514 	last_frag = ind_desc->reserved;
515 	while (!last_frag) {
516 		ind_desc++;
517 		paddr = __le32_to_cpu(ind_desc->msdu_paddr);
518 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
519 		if (!frag_buf) {
520 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%x",
521 				    paddr);
522 			prev_frag_buf->next = NULL;
523 			return -ENOENT;
524 		}
525 
526 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
527 		last_frag = ind_desc->reserved;
528 		amsdu_len -= frag_buf->len;
529 
530 		prev_frag_buf->next = frag_buf;
531 		prev_frag_buf = frag_buf;
532 	}
533 
534 	if (amsdu_len) {
535 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
536 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
537 	}
538 
539 	*msdu_desc = ind_desc;
540 
541 	prev_frag_buf->next = NULL;
542 	return 0;
543 }
544 
545 static int
546 ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt *htt,
547 				  struct sk_buff *msdu,
548 				  struct htt_rx_in_ord_msdu_desc_ext **msdu_desc)
549 {
550 	struct ath10k *ar = htt->ar;
551 	u64 paddr;
552 	struct sk_buff *frag_buf;
553 	struct sk_buff *prev_frag_buf;
554 	u8 last_frag;
555 	struct htt_rx_in_ord_msdu_desc_ext *ind_desc = *msdu_desc;
556 	struct htt_rx_desc *rxd;
557 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
558 
559 	rxd = (void *)msdu->data;
560 	trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
561 
562 	skb_put(msdu, sizeof(struct htt_rx_desc));
563 	skb_pull(msdu, sizeof(struct htt_rx_desc));
564 	skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
565 	amsdu_len -= msdu->len;
566 
567 	last_frag = ind_desc->reserved;
568 	if (last_frag) {
569 		if (amsdu_len) {
570 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
571 				    __le16_to_cpu(ind_desc->msdu_len),
572 				    amsdu_len);
573 		}
574 		return 0;
575 	}
576 
577 	ind_desc++;
578 	paddr = __le64_to_cpu(ind_desc->msdu_paddr);
579 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
580 	if (!frag_buf) {
581 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%llx", paddr);
582 		return -ENOENT;
583 	}
584 
585 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
586 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
587 
588 	amsdu_len -= frag_buf->len;
589 	prev_frag_buf = frag_buf;
590 	last_frag = ind_desc->reserved;
591 	while (!last_frag) {
592 		ind_desc++;
593 		paddr = __le64_to_cpu(ind_desc->msdu_paddr);
594 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
595 		if (!frag_buf) {
596 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%llx",
597 				    paddr);
598 			prev_frag_buf->next = NULL;
599 			return -ENOENT;
600 		}
601 
602 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
603 		last_frag = ind_desc->reserved;
604 		amsdu_len -= frag_buf->len;
605 
606 		prev_frag_buf->next = frag_buf;
607 		prev_frag_buf = frag_buf;
608 	}
609 
610 	if (amsdu_len) {
611 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
612 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
613 	}
614 
615 	*msdu_desc = ind_desc;
616 
617 	prev_frag_buf->next = NULL;
618 	return 0;
619 }
620 
621 static int ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt *htt,
622 					  struct htt_rx_in_ord_ind *ev,
623 					  struct sk_buff_head *list)
624 {
625 	struct ath10k *ar = htt->ar;
626 	struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs32;
627 	struct htt_rx_desc *rxd;
628 	struct sk_buff *msdu;
629 	int msdu_count, ret;
630 	bool is_offload;
631 	u32 paddr;
632 
633 	lockdep_assert_held(&htt->rx_ring.lock);
634 
635 	msdu_count = __le16_to_cpu(ev->msdu_count);
636 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
637 
638 	while (msdu_count--) {
639 		paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
640 
641 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
642 		if (!msdu) {
643 			__skb_queue_purge(list);
644 			return -ENOENT;
645 		}
646 
647 		if (!is_offload && ar->monitor_arvif) {
648 			ret = ath10k_htt_rx_handle_amsdu_mon_32(htt, msdu,
649 								&msdu_desc);
650 			if (ret) {
651 				__skb_queue_purge(list);
652 				return ret;
653 			}
654 			__skb_queue_tail(list, msdu);
655 			msdu_desc++;
656 			continue;
657 		}
658 
659 		__skb_queue_tail(list, msdu);
660 
661 		if (!is_offload) {
662 			rxd = (void *)msdu->data;
663 
664 			trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
665 
666 			skb_put(msdu, sizeof(*rxd));
667 			skb_pull(msdu, sizeof(*rxd));
668 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
669 
670 			if (!(__le32_to_cpu(rxd->attention.flags) &
671 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
672 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
673 				return -EIO;
674 			}
675 		}
676 
677 		msdu_desc++;
678 	}
679 
680 	return 0;
681 }
682 
683 static int ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt *htt,
684 					  struct htt_rx_in_ord_ind *ev,
685 					  struct sk_buff_head *list)
686 {
687 	struct ath10k *ar = htt->ar;
688 	struct htt_rx_in_ord_msdu_desc_ext *msdu_desc = ev->msdu_descs64;
689 	struct htt_rx_desc *rxd;
690 	struct sk_buff *msdu;
691 	int msdu_count, ret;
692 	bool is_offload;
693 	u64 paddr;
694 
695 	lockdep_assert_held(&htt->rx_ring.lock);
696 
697 	msdu_count = __le16_to_cpu(ev->msdu_count);
698 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
699 
700 	while (msdu_count--) {
701 		paddr = __le64_to_cpu(msdu_desc->msdu_paddr);
702 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
703 		if (!msdu) {
704 			__skb_queue_purge(list);
705 			return -ENOENT;
706 		}
707 
708 		if (!is_offload && ar->monitor_arvif) {
709 			ret = ath10k_htt_rx_handle_amsdu_mon_64(htt, msdu,
710 								&msdu_desc);
711 			if (ret) {
712 				__skb_queue_purge(list);
713 				return ret;
714 			}
715 			__skb_queue_tail(list, msdu);
716 			msdu_desc++;
717 			continue;
718 		}
719 
720 		__skb_queue_tail(list, msdu);
721 
722 		if (!is_offload) {
723 			rxd = (void *)msdu->data;
724 
725 			trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
726 
727 			skb_put(msdu, sizeof(*rxd));
728 			skb_pull(msdu, sizeof(*rxd));
729 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
730 
731 			if (!(__le32_to_cpu(rxd->attention.flags) &
732 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
733 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
734 				return -EIO;
735 			}
736 		}
737 
738 		msdu_desc++;
739 	}
740 
741 	return 0;
742 }
743 
744 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
745 {
746 	struct ath10k *ar = htt->ar;
747 	dma_addr_t paddr;
748 	void *vaddr, *vaddr_ring;
749 	size_t size;
750 	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
751 
752 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
753 		return 0;
754 
755 	htt->rx_confused = false;
756 
757 	/* XXX: The fill level could be changed during runtime in response to
758 	 * the host processing latency. Is this really worth it?
759 	 */
760 	htt->rx_ring.size = HTT_RX_RING_SIZE;
761 	htt->rx_ring.size_mask = htt->rx_ring.size - 1;
762 	htt->rx_ring.fill_level = ar->hw_params.rx_ring_fill_level;
763 
764 	if (!is_power_of_2(htt->rx_ring.size)) {
765 		ath10k_warn(ar, "htt rx ring size is not power of 2\n");
766 		return -EINVAL;
767 	}
768 
769 	htt->rx_ring.netbufs_ring =
770 		kcalloc(htt->rx_ring.size, sizeof(struct sk_buff *),
771 			GFP_KERNEL);
772 	if (!htt->rx_ring.netbufs_ring)
773 		goto err_netbuf;
774 
775 	size = ath10k_htt_get_rx_ring_size(htt);
776 
777 	vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
778 	if (!vaddr_ring)
779 		goto err_dma_ring;
780 
781 	ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
782 	htt->rx_ring.base_paddr = paddr;
783 
784 	vaddr = dma_alloc_coherent(htt->ar->dev,
785 				   sizeof(*htt->rx_ring.alloc_idx.vaddr),
786 				   &paddr, GFP_KERNEL);
787 	if (!vaddr)
788 		goto err_dma_idx;
789 
790 	htt->rx_ring.alloc_idx.vaddr = vaddr;
791 	htt->rx_ring.alloc_idx.paddr = paddr;
792 	htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
793 	*htt->rx_ring.alloc_idx.vaddr = 0;
794 
795 	/* Initialize the Rx refill retry timer */
796 	timer_setup(timer, ath10k_htt_rx_ring_refill_retry, 0);
797 
798 	spin_lock_init(&htt->rx_ring.lock);
799 
800 	htt->rx_ring.fill_cnt = 0;
801 	htt->rx_ring.sw_rd_idx.msdu_payld = 0;
802 	hash_init(htt->rx_ring.skb_table);
803 
804 	skb_queue_head_init(&htt->rx_msdus_q);
805 	skb_queue_head_init(&htt->rx_in_ord_compl_q);
806 	skb_queue_head_init(&htt->tx_fetch_ind_q);
807 	atomic_set(&htt->num_mpdus_ready, 0);
808 
809 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
810 		   htt->rx_ring.size, htt->rx_ring.fill_level);
811 	return 0;
812 
813 err_dma_idx:
814 	dma_free_coherent(htt->ar->dev,
815 			  ath10k_htt_get_rx_ring_size(htt),
816 			  vaddr_ring,
817 			  htt->rx_ring.base_paddr);
818 err_dma_ring:
819 	kfree(htt->rx_ring.netbufs_ring);
820 err_netbuf:
821 	return -ENOMEM;
822 }
823 
824 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
825 					  enum htt_rx_mpdu_encrypt_type type)
826 {
827 	switch (type) {
828 	case HTT_RX_MPDU_ENCRYPT_NONE:
829 		return 0;
830 	case HTT_RX_MPDU_ENCRYPT_WEP40:
831 	case HTT_RX_MPDU_ENCRYPT_WEP104:
832 		return IEEE80211_WEP_IV_LEN;
833 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
834 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
835 		return IEEE80211_TKIP_IV_LEN;
836 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
837 		return IEEE80211_CCMP_HDR_LEN;
838 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
839 		return IEEE80211_CCMP_256_HDR_LEN;
840 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
841 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
842 		return IEEE80211_GCMP_HDR_LEN;
843 	case HTT_RX_MPDU_ENCRYPT_WEP128:
844 	case HTT_RX_MPDU_ENCRYPT_WAPI:
845 		break;
846 	}
847 
848 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
849 	return 0;
850 }
851 
852 #define MICHAEL_MIC_LEN 8
853 
854 static int ath10k_htt_rx_crypto_mic_len(struct ath10k *ar,
855 					enum htt_rx_mpdu_encrypt_type type)
856 {
857 	switch (type) {
858 	case HTT_RX_MPDU_ENCRYPT_NONE:
859 	case HTT_RX_MPDU_ENCRYPT_WEP40:
860 	case HTT_RX_MPDU_ENCRYPT_WEP104:
861 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
862 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
863 		return 0;
864 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
865 		return IEEE80211_CCMP_MIC_LEN;
866 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
867 		return IEEE80211_CCMP_256_MIC_LEN;
868 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
869 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
870 		return IEEE80211_GCMP_MIC_LEN;
871 	case HTT_RX_MPDU_ENCRYPT_WEP128:
872 	case HTT_RX_MPDU_ENCRYPT_WAPI:
873 		break;
874 	}
875 
876 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
877 	return 0;
878 }
879 
880 static int ath10k_htt_rx_crypto_icv_len(struct ath10k *ar,
881 					enum htt_rx_mpdu_encrypt_type type)
882 {
883 	switch (type) {
884 	case HTT_RX_MPDU_ENCRYPT_NONE:
885 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
886 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
887 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
888 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
889 		return 0;
890 	case HTT_RX_MPDU_ENCRYPT_WEP40:
891 	case HTT_RX_MPDU_ENCRYPT_WEP104:
892 		return IEEE80211_WEP_ICV_LEN;
893 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
894 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
895 		return IEEE80211_TKIP_ICV_LEN;
896 	case HTT_RX_MPDU_ENCRYPT_WEP128:
897 	case HTT_RX_MPDU_ENCRYPT_WAPI:
898 		break;
899 	}
900 
901 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
902 	return 0;
903 }
904 
905 struct amsdu_subframe_hdr {
906 	u8 dst[ETH_ALEN];
907 	u8 src[ETH_ALEN];
908 	__be16 len;
909 } __packed;
910 
911 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
912 
913 static inline u8 ath10k_bw_to_mac80211_bw(u8 bw)
914 {
915 	u8 ret = 0;
916 
917 	switch (bw) {
918 	case 0:
919 		ret = RATE_INFO_BW_20;
920 		break;
921 	case 1:
922 		ret = RATE_INFO_BW_40;
923 		break;
924 	case 2:
925 		ret = RATE_INFO_BW_80;
926 		break;
927 	case 3:
928 		ret = RATE_INFO_BW_160;
929 		break;
930 	}
931 
932 	return ret;
933 }
934 
935 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
936 				  struct ieee80211_rx_status *status,
937 				  struct htt_rx_desc *rxd)
938 {
939 	struct ieee80211_supported_band *sband;
940 	u8 cck, rate, bw, sgi, mcs, nss;
941 	u8 preamble = 0;
942 	u8 group_id;
943 	u32 info1, info2, info3;
944 
945 	info1 = __le32_to_cpu(rxd->ppdu_start.info1);
946 	info2 = __le32_to_cpu(rxd->ppdu_start.info2);
947 	info3 = __le32_to_cpu(rxd->ppdu_start.info3);
948 
949 	preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
950 
951 	switch (preamble) {
952 	case HTT_RX_LEGACY:
953 		/* To get legacy rate index band is required. Since band can't
954 		 * be undefined check if freq is non-zero.
955 		 */
956 		if (!status->freq)
957 			return;
958 
959 		cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
960 		rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
961 		rate &= ~RX_PPDU_START_RATE_FLAG;
962 
963 		sband = &ar->mac.sbands[status->band];
964 		status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
965 		break;
966 	case HTT_RX_HT:
967 	case HTT_RX_HT_WITH_TXBF:
968 		/* HT-SIG - Table 20-11 in info2 and info3 */
969 		mcs = info2 & 0x1F;
970 		nss = mcs >> 3;
971 		bw = (info2 >> 7) & 1;
972 		sgi = (info3 >> 7) & 1;
973 
974 		status->rate_idx = mcs;
975 		status->encoding = RX_ENC_HT;
976 		if (sgi)
977 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
978 		if (bw)
979 			status->bw = RATE_INFO_BW_40;
980 		break;
981 	case HTT_RX_VHT:
982 	case HTT_RX_VHT_WITH_TXBF:
983 		/* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
984 		 * TODO check this
985 		 */
986 		bw = info2 & 3;
987 		sgi = info3 & 1;
988 		group_id = (info2 >> 4) & 0x3F;
989 
990 		if (GROUP_ID_IS_SU_MIMO(group_id)) {
991 			mcs = (info3 >> 4) & 0x0F;
992 			nss = ((info2 >> 10) & 0x07) + 1;
993 		} else {
994 			/* Hardware doesn't decode VHT-SIG-B into Rx descriptor
995 			 * so it's impossible to decode MCS. Also since
996 			 * firmware consumes Group Id Management frames host
997 			 * has no knowledge regarding group/user position
998 			 * mapping so it's impossible to pick the correct Nsts
999 			 * from VHT-SIG-A1.
1000 			 *
1001 			 * Bandwidth and SGI are valid so report the rateinfo
1002 			 * on best-effort basis.
1003 			 */
1004 			mcs = 0;
1005 			nss = 1;
1006 		}
1007 
1008 		if (mcs > 0x09) {
1009 			ath10k_warn(ar, "invalid MCS received %u\n", mcs);
1010 			ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
1011 				    __le32_to_cpu(rxd->attention.flags),
1012 				    __le32_to_cpu(rxd->mpdu_start.info0),
1013 				    __le32_to_cpu(rxd->mpdu_start.info1),
1014 				    __le32_to_cpu(rxd->msdu_start.common.info0),
1015 				    __le32_to_cpu(rxd->msdu_start.common.info1),
1016 				    rxd->ppdu_start.info0,
1017 				    __le32_to_cpu(rxd->ppdu_start.info1),
1018 				    __le32_to_cpu(rxd->ppdu_start.info2),
1019 				    __le32_to_cpu(rxd->ppdu_start.info3),
1020 				    __le32_to_cpu(rxd->ppdu_start.info4));
1021 
1022 			ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
1023 				    __le32_to_cpu(rxd->msdu_end.common.info0),
1024 				    __le32_to_cpu(rxd->mpdu_end.info0));
1025 
1026 			ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
1027 					"rx desc msdu payload: ",
1028 					rxd->msdu_payload, 50);
1029 		}
1030 
1031 		status->rate_idx = mcs;
1032 		status->nss = nss;
1033 
1034 		if (sgi)
1035 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1036 
1037 		status->bw = ath10k_bw_to_mac80211_bw(bw);
1038 		status->encoding = RX_ENC_VHT;
1039 		break;
1040 	default:
1041 		break;
1042 	}
1043 }
1044 
1045 static struct ieee80211_channel *
1046 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
1047 {
1048 	struct ath10k_peer *peer;
1049 	struct ath10k_vif *arvif;
1050 	struct cfg80211_chan_def def;
1051 	u16 peer_id;
1052 
1053 	lockdep_assert_held(&ar->data_lock);
1054 
1055 	if (!rxd)
1056 		return NULL;
1057 
1058 	if (rxd->attention.flags &
1059 	    __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
1060 		return NULL;
1061 
1062 	if (!(rxd->msdu_end.common.info0 &
1063 	      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
1064 		return NULL;
1065 
1066 	peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1067 		     RX_MPDU_START_INFO0_PEER_IDX);
1068 
1069 	peer = ath10k_peer_find_by_id(ar, peer_id);
1070 	if (!peer)
1071 		return NULL;
1072 
1073 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
1074 	if (WARN_ON_ONCE(!arvif))
1075 		return NULL;
1076 
1077 	if (ath10k_mac_vif_chan(arvif->vif, &def))
1078 		return NULL;
1079 
1080 	return def.chan;
1081 }
1082 
1083 static struct ieee80211_channel *
1084 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
1085 {
1086 	struct ath10k_vif *arvif;
1087 	struct cfg80211_chan_def def;
1088 
1089 	lockdep_assert_held(&ar->data_lock);
1090 
1091 	list_for_each_entry(arvif, &ar->arvifs, list) {
1092 		if (arvif->vdev_id == vdev_id &&
1093 		    ath10k_mac_vif_chan(arvif->vif, &def) == 0)
1094 			return def.chan;
1095 	}
1096 
1097 	return NULL;
1098 }
1099 
1100 static void
1101 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
1102 			      struct ieee80211_chanctx_conf *conf,
1103 			      void *data)
1104 {
1105 	struct cfg80211_chan_def *def = data;
1106 
1107 	*def = conf->def;
1108 }
1109 
1110 static struct ieee80211_channel *
1111 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
1112 {
1113 	struct cfg80211_chan_def def = {};
1114 
1115 	ieee80211_iter_chan_contexts_atomic(ar->hw,
1116 					    ath10k_htt_rx_h_any_chan_iter,
1117 					    &def);
1118 
1119 	return def.chan;
1120 }
1121 
1122 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
1123 				    struct ieee80211_rx_status *status,
1124 				    struct htt_rx_desc *rxd,
1125 				    u32 vdev_id)
1126 {
1127 	struct ieee80211_channel *ch;
1128 
1129 	spin_lock_bh(&ar->data_lock);
1130 	ch = ar->scan_channel;
1131 	if (!ch)
1132 		ch = ar->rx_channel;
1133 	if (!ch)
1134 		ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
1135 	if (!ch)
1136 		ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
1137 	if (!ch)
1138 		ch = ath10k_htt_rx_h_any_channel(ar);
1139 	if (!ch)
1140 		ch = ar->tgt_oper_chan;
1141 	spin_unlock_bh(&ar->data_lock);
1142 
1143 	if (!ch)
1144 		return false;
1145 
1146 	status->band = ch->band;
1147 	status->freq = ch->center_freq;
1148 
1149 	return true;
1150 }
1151 
1152 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
1153 				   struct ieee80211_rx_status *status,
1154 				   struct htt_rx_desc *rxd)
1155 {
1156 	int i;
1157 
1158 	for (i = 0; i < IEEE80211_MAX_CHAINS ; i++) {
1159 		status->chains &= ~BIT(i);
1160 
1161 		if (rxd->ppdu_start.rssi_chains[i].pri20_mhz != 0x80) {
1162 			status->chain_signal[i] = ATH10K_DEFAULT_NOISE_FLOOR +
1163 				rxd->ppdu_start.rssi_chains[i].pri20_mhz;
1164 
1165 			status->chains |= BIT(i);
1166 		}
1167 	}
1168 
1169 	/* FIXME: Get real NF */
1170 	status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
1171 			 rxd->ppdu_start.rssi_comb;
1172 	status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
1173 }
1174 
1175 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
1176 				    struct ieee80211_rx_status *status,
1177 				    struct htt_rx_desc *rxd)
1178 {
1179 	/* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
1180 	 * means all prior MSDUs in a PPDU are reported to mac80211 without the
1181 	 * TSF. Is it worth holding frames until end of PPDU is known?
1182 	 *
1183 	 * FIXME: Can we get/compute 64bit TSF?
1184 	 */
1185 	status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
1186 	status->flag |= RX_FLAG_MACTIME_END;
1187 }
1188 
1189 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
1190 				 struct sk_buff_head *amsdu,
1191 				 struct ieee80211_rx_status *status,
1192 				 u32 vdev_id)
1193 {
1194 	struct sk_buff *first;
1195 	struct htt_rx_desc *rxd;
1196 	bool is_first_ppdu;
1197 	bool is_last_ppdu;
1198 
1199 	if (skb_queue_empty(amsdu))
1200 		return;
1201 
1202 	first = skb_peek(amsdu);
1203 	rxd = (void *)first->data - sizeof(*rxd);
1204 
1205 	is_first_ppdu = !!(rxd->attention.flags &
1206 			   __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
1207 	is_last_ppdu = !!(rxd->attention.flags &
1208 			  __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
1209 
1210 	if (is_first_ppdu) {
1211 		/* New PPDU starts so clear out the old per-PPDU status. */
1212 		status->freq = 0;
1213 		status->rate_idx = 0;
1214 		status->nss = 0;
1215 		status->encoding = RX_ENC_LEGACY;
1216 		status->bw = RATE_INFO_BW_20;
1217 
1218 		status->flag &= ~RX_FLAG_MACTIME_END;
1219 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1220 
1221 		status->flag &= ~(RX_FLAG_AMPDU_IS_LAST);
1222 		status->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
1223 		status->ampdu_reference = ar->ampdu_reference;
1224 
1225 		ath10k_htt_rx_h_signal(ar, status, rxd);
1226 		ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
1227 		ath10k_htt_rx_h_rates(ar, status, rxd);
1228 	}
1229 
1230 	if (is_last_ppdu) {
1231 		ath10k_htt_rx_h_mactime(ar, status, rxd);
1232 
1233 		/* set ampdu last segment flag */
1234 		status->flag |= RX_FLAG_AMPDU_IS_LAST;
1235 		ar->ampdu_reference++;
1236 	}
1237 }
1238 
1239 static const char * const tid_to_ac[] = {
1240 	"BE",
1241 	"BK",
1242 	"BK",
1243 	"BE",
1244 	"VI",
1245 	"VI",
1246 	"VO",
1247 	"VO",
1248 };
1249 
1250 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
1251 {
1252 	u8 *qc;
1253 	int tid;
1254 
1255 	if (!ieee80211_is_data_qos(hdr->frame_control))
1256 		return "";
1257 
1258 	qc = ieee80211_get_qos_ctl(hdr);
1259 	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1260 	if (tid < 8)
1261 		snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
1262 	else
1263 		snprintf(out, size, "tid %d", tid);
1264 
1265 	return out;
1266 }
1267 
1268 static void ath10k_htt_rx_h_queue_msdu(struct ath10k *ar,
1269 				       struct ieee80211_rx_status *rx_status,
1270 				       struct sk_buff *skb)
1271 {
1272 	struct ieee80211_rx_status *status;
1273 
1274 	status = IEEE80211_SKB_RXCB(skb);
1275 	*status = *rx_status;
1276 
1277 	skb_queue_tail(&ar->htt.rx_msdus_q, skb);
1278 }
1279 
1280 static void ath10k_process_rx(struct ath10k *ar, struct sk_buff *skb)
1281 {
1282 	struct ieee80211_rx_status *status;
1283 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1284 	char tid[32];
1285 
1286 	status = IEEE80211_SKB_RXCB(skb);
1287 
1288 	if (!(ar->filter_flags & FIF_FCSFAIL) &&
1289 	    status->flag & RX_FLAG_FAILED_FCS_CRC) {
1290 		ar->stats.rx_crc_err_drop++;
1291 		dev_kfree_skb_any(skb);
1292 		return;
1293 	}
1294 
1295 	ath10k_dbg(ar, ATH10K_DBG_DATA,
1296 		   "rx skb %pK len %u peer %pM %s %s sn %u %s%s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i mic-err %i amsdu-more %i\n",
1297 		   skb,
1298 		   skb->len,
1299 		   ieee80211_get_SA(hdr),
1300 		   ath10k_get_tid(hdr, tid, sizeof(tid)),
1301 		   is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
1302 							"mcast" : "ucast",
1303 		   (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
1304 		   (status->encoding == RX_ENC_LEGACY) ? "legacy" : "",
1305 		   (status->encoding == RX_ENC_HT) ? "ht" : "",
1306 		   (status->encoding == RX_ENC_VHT) ? "vht" : "",
1307 		   (status->bw == RATE_INFO_BW_40) ? "40" : "",
1308 		   (status->bw == RATE_INFO_BW_80) ? "80" : "",
1309 		   (status->bw == RATE_INFO_BW_160) ? "160" : "",
1310 		   status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "",
1311 		   status->rate_idx,
1312 		   status->nss,
1313 		   status->freq,
1314 		   status->band, status->flag,
1315 		   !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1316 		   !!(status->flag & RX_FLAG_MMIC_ERROR),
1317 		   !!(status->flag & RX_FLAG_AMSDU_MORE));
1318 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1319 			skb->data, skb->len);
1320 	trace_ath10k_rx_hdr(ar, skb->data, skb->len);
1321 	trace_ath10k_rx_payload(ar, skb->data, skb->len);
1322 
1323 	ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
1324 }
1325 
1326 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
1327 				      struct ieee80211_hdr *hdr)
1328 {
1329 	int len = ieee80211_hdrlen(hdr->frame_control);
1330 
1331 	if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
1332 		      ar->running_fw->fw_file.fw_features))
1333 		len = round_up(len, 4);
1334 
1335 	return len;
1336 }
1337 
1338 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
1339 					struct sk_buff *msdu,
1340 					struct ieee80211_rx_status *status,
1341 					enum htt_rx_mpdu_encrypt_type enctype,
1342 					bool is_decrypted,
1343 					const u8 first_hdr[64])
1344 {
1345 	struct ieee80211_hdr *hdr;
1346 	struct htt_rx_desc *rxd;
1347 	size_t hdr_len;
1348 	size_t crypto_len;
1349 	bool is_first;
1350 	bool is_last;
1351 	bool msdu_limit_err;
1352 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1353 	u8 *qos;
1354 
1355 	rxd = (void *)msdu->data - sizeof(*rxd);
1356 	is_first = !!(rxd->msdu_end.common.info0 &
1357 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1358 	is_last = !!(rxd->msdu_end.common.info0 &
1359 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1360 
1361 	/* Delivered decapped frame:
1362 	 * [802.11 header]
1363 	 * [crypto param] <-- can be trimmed if !fcs_err &&
1364 	 *                    !decrypt_err && !peer_idx_invalid
1365 	 * [amsdu header] <-- only if A-MSDU
1366 	 * [rfc1042/llc]
1367 	 * [payload]
1368 	 * [FCS] <-- at end, needs to be trimmed
1369 	 */
1370 
1371 	/* Some hardwares(QCA99x0 variants) limit number of msdus in a-msdu when
1372 	 * deaggregate, so that unwanted MSDU-deaggregation is avoided for
1373 	 * error packets. If limit exceeds, hw sends all remaining MSDUs as
1374 	 * a single last MSDU with this msdu limit error set.
1375 	 */
1376 	msdu_limit_err = ath10k_rx_desc_msdu_limit_error(&ar->hw_params, rxd);
1377 
1378 	/* If MSDU limit error happens, then don't warn on, the partial raw MSDU
1379 	 * without first MSDU is expected in that case, and handled later here.
1380 	 */
1381 	/* This probably shouldn't happen but warn just in case */
1382 	if (WARN_ON_ONCE(!is_first && !msdu_limit_err))
1383 		return;
1384 
1385 	/* This probably shouldn't happen but warn just in case */
1386 	if (WARN_ON_ONCE(!(is_first && is_last) && !msdu_limit_err))
1387 		return;
1388 
1389 	skb_trim(msdu, msdu->len - FCS_LEN);
1390 
1391 	/* Push original 80211 header */
1392 	if (unlikely(msdu_limit_err)) {
1393 		hdr = (struct ieee80211_hdr *)first_hdr;
1394 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1395 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1396 
1397 		if (ieee80211_is_data_qos(hdr->frame_control)) {
1398 			qos = ieee80211_get_qos_ctl(hdr);
1399 			qos[0] |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1400 		}
1401 
1402 		if (crypto_len)
1403 			memcpy(skb_push(msdu, crypto_len),
1404 			       (void *)hdr + round_up(hdr_len, bytes_aligned),
1405 			       crypto_len);
1406 
1407 		memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1408 	}
1409 
1410 	/* In most cases this will be true for sniffed frames. It makes sense
1411 	 * to deliver them as-is without stripping the crypto param. This is
1412 	 * necessary for software based decryption.
1413 	 *
1414 	 * If there's no error then the frame is decrypted. At least that is
1415 	 * the case for frames that come in via fragmented rx indication.
1416 	 */
1417 	if (!is_decrypted)
1418 		return;
1419 
1420 	/* The payload is decrypted so strip crypto params. Start from tail
1421 	 * since hdr is used to compute some stuff.
1422 	 */
1423 
1424 	hdr = (void *)msdu->data;
1425 
1426 	/* Tail */
1427 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1428 		skb_trim(msdu, msdu->len -
1429 			 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1430 
1431 		skb_trim(msdu, msdu->len -
1432 			 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1433 	} else {
1434 		/* MIC */
1435 		if (status->flag & RX_FLAG_MIC_STRIPPED)
1436 			skb_trim(msdu, msdu->len -
1437 				 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1438 
1439 		/* ICV */
1440 		if (status->flag & RX_FLAG_ICV_STRIPPED)
1441 			skb_trim(msdu, msdu->len -
1442 				 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1443 	}
1444 
1445 	/* MMIC */
1446 	if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1447 	    !ieee80211_has_morefrags(hdr->frame_control) &&
1448 	    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1449 		skb_trim(msdu, msdu->len - MICHAEL_MIC_LEN);
1450 
1451 	/* Head */
1452 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1453 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1454 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1455 
1456 		memmove((void *)msdu->data + crypto_len,
1457 			(void *)msdu->data, hdr_len);
1458 		skb_pull(msdu, crypto_len);
1459 	}
1460 }
1461 
1462 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1463 					  struct sk_buff *msdu,
1464 					  struct ieee80211_rx_status *status,
1465 					  const u8 first_hdr[64],
1466 					  enum htt_rx_mpdu_encrypt_type enctype)
1467 {
1468 	struct ieee80211_hdr *hdr;
1469 	struct htt_rx_desc *rxd;
1470 	size_t hdr_len;
1471 	u8 da[ETH_ALEN];
1472 	u8 sa[ETH_ALEN];
1473 	int l3_pad_bytes;
1474 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1475 
1476 	/* Delivered decapped frame:
1477 	 * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1478 	 * [rfc1042/llc]
1479 	 *
1480 	 * Note: The nwifi header doesn't have QoS Control and is
1481 	 * (always?) a 3addr frame.
1482 	 *
1483 	 * Note2: There's no A-MSDU subframe header. Even if it's part
1484 	 * of an A-MSDU.
1485 	 */
1486 
1487 	/* pull decapped header and copy SA & DA */
1488 	rxd = (void *)msdu->data - sizeof(*rxd);
1489 
1490 	l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1491 	skb_put(msdu, l3_pad_bytes);
1492 
1493 	hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes);
1494 
1495 	hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1496 	ether_addr_copy(da, ieee80211_get_DA(hdr));
1497 	ether_addr_copy(sa, ieee80211_get_SA(hdr));
1498 	skb_pull(msdu, hdr_len);
1499 
1500 	/* push original 802.11 header */
1501 	hdr = (struct ieee80211_hdr *)first_hdr;
1502 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1503 
1504 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1505 		memcpy(skb_push(msdu,
1506 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1507 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1508 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1509 	}
1510 
1511 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1512 
1513 	/* original 802.11 header has a different DA and in
1514 	 * case of 4addr it may also have different SA
1515 	 */
1516 	hdr = (struct ieee80211_hdr *)msdu->data;
1517 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1518 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1519 }
1520 
1521 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1522 					  struct sk_buff *msdu,
1523 					  enum htt_rx_mpdu_encrypt_type enctype)
1524 {
1525 	struct ieee80211_hdr *hdr;
1526 	struct htt_rx_desc *rxd;
1527 	size_t hdr_len, crypto_len;
1528 	void *rfc1042;
1529 	bool is_first, is_last, is_amsdu;
1530 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1531 
1532 	rxd = (void *)msdu->data - sizeof(*rxd);
1533 	hdr = (void *)rxd->rx_hdr_status;
1534 
1535 	is_first = !!(rxd->msdu_end.common.info0 &
1536 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1537 	is_last = !!(rxd->msdu_end.common.info0 &
1538 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1539 	is_amsdu = !(is_first && is_last);
1540 
1541 	rfc1042 = hdr;
1542 
1543 	if (is_first) {
1544 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1545 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1546 
1547 		rfc1042 += round_up(hdr_len, bytes_aligned) +
1548 			   round_up(crypto_len, bytes_aligned);
1549 	}
1550 
1551 	if (is_amsdu)
1552 		rfc1042 += sizeof(struct amsdu_subframe_hdr);
1553 
1554 	return rfc1042;
1555 }
1556 
1557 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1558 					struct sk_buff *msdu,
1559 					struct ieee80211_rx_status *status,
1560 					const u8 first_hdr[64],
1561 					enum htt_rx_mpdu_encrypt_type enctype)
1562 {
1563 	struct ieee80211_hdr *hdr;
1564 	struct ethhdr *eth;
1565 	size_t hdr_len;
1566 	void *rfc1042;
1567 	u8 da[ETH_ALEN];
1568 	u8 sa[ETH_ALEN];
1569 	int l3_pad_bytes;
1570 	struct htt_rx_desc *rxd;
1571 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1572 
1573 	/* Delivered decapped frame:
1574 	 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1575 	 * [payload]
1576 	 */
1577 
1578 	rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1579 	if (WARN_ON_ONCE(!rfc1042))
1580 		return;
1581 
1582 	rxd = (void *)msdu->data - sizeof(*rxd);
1583 	l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1584 	skb_put(msdu, l3_pad_bytes);
1585 	skb_pull(msdu, l3_pad_bytes);
1586 
1587 	/* pull decapped header and copy SA & DA */
1588 	eth = (struct ethhdr *)msdu->data;
1589 	ether_addr_copy(da, eth->h_dest);
1590 	ether_addr_copy(sa, eth->h_source);
1591 	skb_pull(msdu, sizeof(struct ethhdr));
1592 
1593 	/* push rfc1042/llc/snap */
1594 	memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1595 	       sizeof(struct rfc1042_hdr));
1596 
1597 	/* push original 802.11 header */
1598 	hdr = (struct ieee80211_hdr *)first_hdr;
1599 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1600 
1601 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1602 		memcpy(skb_push(msdu,
1603 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1604 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1605 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1606 	}
1607 
1608 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1609 
1610 	/* original 802.11 header has a different DA and in
1611 	 * case of 4addr it may also have different SA
1612 	 */
1613 	hdr = (struct ieee80211_hdr *)msdu->data;
1614 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1615 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1616 }
1617 
1618 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1619 					 struct sk_buff *msdu,
1620 					 struct ieee80211_rx_status *status,
1621 					 const u8 first_hdr[64],
1622 					 enum htt_rx_mpdu_encrypt_type enctype)
1623 {
1624 	struct ieee80211_hdr *hdr;
1625 	size_t hdr_len;
1626 	int l3_pad_bytes;
1627 	struct htt_rx_desc *rxd;
1628 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1629 
1630 	/* Delivered decapped frame:
1631 	 * [amsdu header] <-- replaced with 802.11 hdr
1632 	 * [rfc1042/llc]
1633 	 * [payload]
1634 	 */
1635 
1636 	rxd = (void *)msdu->data - sizeof(*rxd);
1637 	l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1638 
1639 	skb_put(msdu, l3_pad_bytes);
1640 	skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes);
1641 
1642 	hdr = (struct ieee80211_hdr *)first_hdr;
1643 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1644 
1645 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1646 		memcpy(skb_push(msdu,
1647 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1648 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1649 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1650 	}
1651 
1652 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1653 }
1654 
1655 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1656 				    struct sk_buff *msdu,
1657 				    struct ieee80211_rx_status *status,
1658 				    u8 first_hdr[64],
1659 				    enum htt_rx_mpdu_encrypt_type enctype,
1660 				    bool is_decrypted)
1661 {
1662 	struct htt_rx_desc *rxd;
1663 	enum rx_msdu_decap_format decap;
1664 
1665 	/* First msdu's decapped header:
1666 	 * [802.11 header] <-- padded to 4 bytes long
1667 	 * [crypto param] <-- padded to 4 bytes long
1668 	 * [amsdu header] <-- only if A-MSDU
1669 	 * [rfc1042/llc]
1670 	 *
1671 	 * Other (2nd, 3rd, ..) msdu's decapped header:
1672 	 * [amsdu header] <-- only if A-MSDU
1673 	 * [rfc1042/llc]
1674 	 */
1675 
1676 	rxd = (void *)msdu->data - sizeof(*rxd);
1677 	decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1678 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
1679 
1680 	switch (decap) {
1681 	case RX_MSDU_DECAP_RAW:
1682 		ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1683 					    is_decrypted, first_hdr);
1684 		break;
1685 	case RX_MSDU_DECAP_NATIVE_WIFI:
1686 		ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
1687 					      enctype);
1688 		break;
1689 	case RX_MSDU_DECAP_ETHERNET2_DIX:
1690 		ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1691 		break;
1692 	case RX_MSDU_DECAP_8023_SNAP_LLC:
1693 		ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr,
1694 					     enctype);
1695 		break;
1696 	}
1697 }
1698 
1699 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1700 {
1701 	struct htt_rx_desc *rxd;
1702 	u32 flags, info;
1703 	bool is_ip4, is_ip6;
1704 	bool is_tcp, is_udp;
1705 	bool ip_csum_ok, tcpudp_csum_ok;
1706 
1707 	rxd = (void *)skb->data - sizeof(*rxd);
1708 	flags = __le32_to_cpu(rxd->attention.flags);
1709 	info = __le32_to_cpu(rxd->msdu_start.common.info1);
1710 
1711 	is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1712 	is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1713 	is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1714 	is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1715 	ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1716 	tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1717 
1718 	if (!is_ip4 && !is_ip6)
1719 		return CHECKSUM_NONE;
1720 	if (!is_tcp && !is_udp)
1721 		return CHECKSUM_NONE;
1722 	if (!ip_csum_ok)
1723 		return CHECKSUM_NONE;
1724 	if (!tcpudp_csum_ok)
1725 		return CHECKSUM_NONE;
1726 
1727 	return CHECKSUM_UNNECESSARY;
1728 }
1729 
1730 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
1731 {
1732 	msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
1733 }
1734 
1735 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1736 				 struct sk_buff_head *amsdu,
1737 				 struct ieee80211_rx_status *status,
1738 				 bool fill_crypt_header,
1739 				 u8 *rx_hdr,
1740 				 enum ath10k_pkt_rx_err *err)
1741 {
1742 	struct sk_buff *first;
1743 	struct sk_buff *last;
1744 	struct sk_buff *msdu;
1745 	struct htt_rx_desc *rxd;
1746 	struct ieee80211_hdr *hdr;
1747 	enum htt_rx_mpdu_encrypt_type enctype;
1748 	u8 first_hdr[64];
1749 	u8 *qos;
1750 	bool has_fcs_err;
1751 	bool has_crypto_err;
1752 	bool has_tkip_err;
1753 	bool has_peer_idx_invalid;
1754 	bool is_decrypted;
1755 	bool is_mgmt;
1756 	u32 attention;
1757 
1758 	if (skb_queue_empty(amsdu))
1759 		return;
1760 
1761 	first = skb_peek(amsdu);
1762 	rxd = (void *)first->data - sizeof(*rxd);
1763 
1764 	is_mgmt = !!(rxd->attention.flags &
1765 		     __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1766 
1767 	enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1768 		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1769 
1770 	/* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1771 	 * decapped header. It'll be used for undecapping of each MSDU.
1772 	 */
1773 	hdr = (void *)rxd->rx_hdr_status;
1774 	memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1775 
1776 	if (rx_hdr)
1777 		memcpy(rx_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1778 
1779 	/* Each A-MSDU subframe will use the original header as the base and be
1780 	 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1781 	 */
1782 	hdr = (void *)first_hdr;
1783 
1784 	if (ieee80211_is_data_qos(hdr->frame_control)) {
1785 		qos = ieee80211_get_qos_ctl(hdr);
1786 		qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1787 	}
1788 
1789 	/* Some attention flags are valid only in the last MSDU. */
1790 	last = skb_peek_tail(amsdu);
1791 	rxd = (void *)last->data - sizeof(*rxd);
1792 	attention = __le32_to_cpu(rxd->attention.flags);
1793 
1794 	has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1795 	has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1796 	has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1797 	has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1798 
1799 	/* Note: If hardware captures an encrypted frame that it can't decrypt,
1800 	 * e.g. due to fcs error, missing peer or invalid key data it will
1801 	 * report the frame as raw.
1802 	 */
1803 	is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
1804 			!has_fcs_err &&
1805 			!has_crypto_err &&
1806 			!has_peer_idx_invalid);
1807 
1808 	/* Clear per-MPDU flags while leaving per-PPDU flags intact. */
1809 	status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
1810 			  RX_FLAG_MMIC_ERROR |
1811 			  RX_FLAG_DECRYPTED |
1812 			  RX_FLAG_IV_STRIPPED |
1813 			  RX_FLAG_ONLY_MONITOR |
1814 			  RX_FLAG_MMIC_STRIPPED);
1815 
1816 	if (has_fcs_err)
1817 		status->flag |= RX_FLAG_FAILED_FCS_CRC;
1818 
1819 	if (has_tkip_err)
1820 		status->flag |= RX_FLAG_MMIC_ERROR;
1821 
1822 	if (err) {
1823 		if (has_fcs_err)
1824 			*err = ATH10K_PKT_RX_ERR_FCS;
1825 		else if (has_tkip_err)
1826 			*err = ATH10K_PKT_RX_ERR_TKIP;
1827 		else if (has_crypto_err)
1828 			*err = ATH10K_PKT_RX_ERR_CRYPT;
1829 		else if (has_peer_idx_invalid)
1830 			*err = ATH10K_PKT_RX_ERR_PEER_IDX_INVAL;
1831 	}
1832 
1833 	/* Firmware reports all necessary management frames via WMI already.
1834 	 * They are not reported to monitor interfaces at all so pass the ones
1835 	 * coming via HTT to monitor interfaces instead. This simplifies
1836 	 * matters a lot.
1837 	 */
1838 	if (is_mgmt)
1839 		status->flag |= RX_FLAG_ONLY_MONITOR;
1840 
1841 	if (is_decrypted) {
1842 		status->flag |= RX_FLAG_DECRYPTED;
1843 
1844 		if (likely(!is_mgmt))
1845 			status->flag |= RX_FLAG_MMIC_STRIPPED;
1846 
1847 		if (fill_crypt_header)
1848 			status->flag |= RX_FLAG_MIC_STRIPPED |
1849 					RX_FLAG_ICV_STRIPPED;
1850 		else
1851 			status->flag |= RX_FLAG_IV_STRIPPED;
1852 	}
1853 
1854 	skb_queue_walk(amsdu, msdu) {
1855 		ath10k_htt_rx_h_csum_offload(msdu);
1856 		ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
1857 					is_decrypted);
1858 
1859 		/* Undecapping involves copying the original 802.11 header back
1860 		 * to sk_buff. If frame is protected and hardware has decrypted
1861 		 * it then remove the protected bit.
1862 		 */
1863 		if (!is_decrypted)
1864 			continue;
1865 		if (is_mgmt)
1866 			continue;
1867 
1868 		if (fill_crypt_header)
1869 			continue;
1870 
1871 		hdr = (void *)msdu->data;
1872 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1873 	}
1874 }
1875 
1876 static void ath10k_htt_rx_h_enqueue(struct ath10k *ar,
1877 				    struct sk_buff_head *amsdu,
1878 				    struct ieee80211_rx_status *status)
1879 {
1880 	struct sk_buff *msdu;
1881 	struct sk_buff *first_subframe;
1882 
1883 	first_subframe = skb_peek(amsdu);
1884 
1885 	while ((msdu = __skb_dequeue(amsdu))) {
1886 		/* Setup per-MSDU flags */
1887 		if (skb_queue_empty(amsdu))
1888 			status->flag &= ~RX_FLAG_AMSDU_MORE;
1889 		else
1890 			status->flag |= RX_FLAG_AMSDU_MORE;
1891 
1892 		if (msdu == first_subframe) {
1893 			first_subframe = NULL;
1894 			status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
1895 		} else {
1896 			status->flag |= RX_FLAG_ALLOW_SAME_PN;
1897 		}
1898 
1899 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
1900 	}
1901 }
1902 
1903 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu,
1904 			       unsigned long *unchain_cnt)
1905 {
1906 	struct sk_buff *skb, *first;
1907 	int space;
1908 	int total_len = 0;
1909 	int amsdu_len = skb_queue_len(amsdu);
1910 
1911 	/* TODO:  Might could optimize this by using
1912 	 * skb_try_coalesce or similar method to
1913 	 * decrease copying, or maybe get mac80211 to
1914 	 * provide a way to just receive a list of
1915 	 * skb?
1916 	 */
1917 
1918 	first = __skb_dequeue(amsdu);
1919 
1920 	/* Allocate total length all at once. */
1921 	skb_queue_walk(amsdu, skb)
1922 		total_len += skb->len;
1923 
1924 	space = total_len - skb_tailroom(first);
1925 	if ((space > 0) &&
1926 	    (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
1927 		/* TODO:  bump some rx-oom error stat */
1928 		/* put it back together so we can free the
1929 		 * whole list at once.
1930 		 */
1931 		__skb_queue_head(amsdu, first);
1932 		return -1;
1933 	}
1934 
1935 	/* Walk list again, copying contents into
1936 	 * msdu_head
1937 	 */
1938 	while ((skb = __skb_dequeue(amsdu))) {
1939 		skb_copy_from_linear_data(skb, skb_put(first, skb->len),
1940 					  skb->len);
1941 		dev_kfree_skb_any(skb);
1942 	}
1943 
1944 	__skb_queue_head(amsdu, first);
1945 
1946 	*unchain_cnt += amsdu_len - 1;
1947 
1948 	return 0;
1949 }
1950 
1951 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
1952 				    struct sk_buff_head *amsdu,
1953 				    unsigned long *drop_cnt,
1954 				    unsigned long *unchain_cnt)
1955 {
1956 	struct sk_buff *first;
1957 	struct htt_rx_desc *rxd;
1958 	enum rx_msdu_decap_format decap;
1959 
1960 	first = skb_peek(amsdu);
1961 	rxd = (void *)first->data - sizeof(*rxd);
1962 	decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1963 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
1964 
1965 	/* FIXME: Current unchaining logic can only handle simple case of raw
1966 	 * msdu chaining. If decapping is other than raw the chaining may be
1967 	 * more complex and this isn't handled by the current code. Don't even
1968 	 * try re-constructing such frames - it'll be pretty much garbage.
1969 	 */
1970 	if (decap != RX_MSDU_DECAP_RAW ||
1971 	    skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
1972 		*drop_cnt += skb_queue_len(amsdu);
1973 		__skb_queue_purge(amsdu);
1974 		return;
1975 	}
1976 
1977 	ath10k_unchain_msdu(amsdu, unchain_cnt);
1978 }
1979 
1980 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
1981 					struct sk_buff_head *amsdu,
1982 					struct ieee80211_rx_status *rx_status)
1983 {
1984 	/* FIXME: It might be a good idea to do some fuzzy-testing to drop
1985 	 * invalid/dangerous frames.
1986 	 */
1987 
1988 	if (!rx_status->freq) {
1989 		ath10k_dbg(ar, ATH10K_DBG_HTT, "no channel configured; ignoring frame(s)!\n");
1990 		return false;
1991 	}
1992 
1993 	if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
1994 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1995 		return false;
1996 	}
1997 
1998 	return true;
1999 }
2000 
2001 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
2002 				   struct sk_buff_head *amsdu,
2003 				   struct ieee80211_rx_status *rx_status,
2004 				   unsigned long *drop_cnt)
2005 {
2006 	if (skb_queue_empty(amsdu))
2007 		return;
2008 
2009 	if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
2010 		return;
2011 
2012 	if (drop_cnt)
2013 		*drop_cnt += skb_queue_len(amsdu);
2014 
2015 	__skb_queue_purge(amsdu);
2016 }
2017 
2018 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
2019 {
2020 	struct ath10k *ar = htt->ar;
2021 	struct ieee80211_rx_status *rx_status = &htt->rx_status;
2022 	struct sk_buff_head amsdu;
2023 	int ret;
2024 	unsigned long drop_cnt = 0;
2025 	unsigned long unchain_cnt = 0;
2026 	unsigned long drop_cnt_filter = 0;
2027 	unsigned long msdus_to_queue, num_msdus;
2028 	enum ath10k_pkt_rx_err err = ATH10K_PKT_RX_ERR_MAX;
2029 	u8 first_hdr[RX_HTT_HDR_STATUS_LEN];
2030 
2031 	__skb_queue_head_init(&amsdu);
2032 
2033 	spin_lock_bh(&htt->rx_ring.lock);
2034 	if (htt->rx_confused) {
2035 		spin_unlock_bh(&htt->rx_ring.lock);
2036 		return -EIO;
2037 	}
2038 	ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
2039 	spin_unlock_bh(&htt->rx_ring.lock);
2040 
2041 	if (ret < 0) {
2042 		ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
2043 		__skb_queue_purge(&amsdu);
2044 		/* FIXME: It's probably a good idea to reboot the
2045 		 * device instead of leaving it inoperable.
2046 		 */
2047 		htt->rx_confused = true;
2048 		return ret;
2049 	}
2050 
2051 	num_msdus = skb_queue_len(&amsdu);
2052 
2053 	ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
2054 
2055 	/* only for ret = 1 indicates chained msdus */
2056 	if (ret > 0)
2057 		ath10k_htt_rx_h_unchain(ar, &amsdu, &drop_cnt, &unchain_cnt);
2058 
2059 	ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
2060 	ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err);
2061 	msdus_to_queue = skb_queue_len(&amsdu);
2062 	ath10k_htt_rx_h_enqueue(ar, &amsdu, rx_status);
2063 
2064 	ath10k_sta_update_rx_tid_stats(ar, first_hdr, num_msdus, err,
2065 				       unchain_cnt, drop_cnt, drop_cnt_filter,
2066 				       msdus_to_queue);
2067 
2068 	return 0;
2069 }
2070 
2071 static void ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc *rx_desc,
2072 					  union htt_rx_pn_t *pn,
2073 					  int pn_len_bits)
2074 {
2075 	switch (pn_len_bits) {
2076 	case 48:
2077 		pn->pn48 = __le32_to_cpu(rx_desc->pn_31_0) +
2078 			   ((u64)(__le32_to_cpu(rx_desc->u0.pn_63_32) & 0xFFFF) << 32);
2079 		break;
2080 	case 24:
2081 		pn->pn24 = __le32_to_cpu(rx_desc->pn_31_0);
2082 		break;
2083 	}
2084 }
2085 
2086 static bool ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t *new_pn,
2087 				   union htt_rx_pn_t *old_pn)
2088 {
2089 	return ((new_pn->pn48 & 0xffffffffffffULL) <=
2090 		(old_pn->pn48 & 0xffffffffffffULL));
2091 }
2092 
2093 static bool ath10k_htt_rx_pn_check_replay_hl(struct ath10k *ar,
2094 					     struct ath10k_peer *peer,
2095 					     struct htt_rx_indication_hl *rx)
2096 {
2097 	bool last_pn_valid, pn_invalid = false;
2098 	enum htt_txrx_sec_cast_type sec_index;
2099 	enum htt_security_types sec_type;
2100 	union htt_rx_pn_t new_pn = {0};
2101 	struct htt_hl_rx_desc *rx_desc;
2102 	union htt_rx_pn_t *last_pn;
2103 	u32 rx_desc_info, tid;
2104 	int num_mpdu_ranges;
2105 
2106 	lockdep_assert_held(&ar->data_lock);
2107 
2108 	if (!peer)
2109 		return false;
2110 
2111 	if (!(rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU))
2112 		return false;
2113 
2114 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2115 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2116 
2117 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2118 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2119 
2120 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED))
2121 		return false;
2122 
2123 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2124 	last_pn_valid = peer->tids_last_pn_valid[tid];
2125 	last_pn = &peer->tids_last_pn[tid];
2126 
2127 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2128 		sec_index = HTT_TXRX_SEC_MCAST;
2129 	else
2130 		sec_index = HTT_TXRX_SEC_UCAST;
2131 
2132 	sec_type = peer->rx_pn[sec_index].sec_type;
2133 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2134 
2135 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2136 	    sec_type != HTT_SECURITY_TKIP &&
2137 	    sec_type != HTT_SECURITY_TKIP_NOMIC)
2138 		return false;
2139 
2140 	if (last_pn_valid)
2141 		pn_invalid = ath10k_htt_rx_pn_cmp48(&new_pn, last_pn);
2142 	else
2143 		peer->tids_last_pn_valid[tid] = true;
2144 
2145 	if (!pn_invalid)
2146 		last_pn->pn48 = new_pn.pn48;
2147 
2148 	return pn_invalid;
2149 }
2150 
2151 static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
2152 					 struct htt_rx_indication_hl *rx,
2153 					 struct sk_buff *skb,
2154 					 enum htt_rx_pn_check_type check_pn_type,
2155 					 enum htt_rx_tkip_demic_type tkip_mic_type)
2156 {
2157 	struct ath10k *ar = htt->ar;
2158 	struct ath10k_peer *peer;
2159 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2160 	struct fw_rx_desc_hl *fw_desc;
2161 	enum htt_txrx_sec_cast_type sec_index;
2162 	enum htt_security_types sec_type;
2163 	union htt_rx_pn_t new_pn = {0};
2164 	struct htt_hl_rx_desc *rx_desc;
2165 	struct ieee80211_hdr *hdr;
2166 	struct ieee80211_rx_status *rx_status;
2167 	u16 peer_id;
2168 	u8 rx_desc_len;
2169 	int num_mpdu_ranges;
2170 	size_t tot_hdr_len;
2171 	struct ieee80211_channel *ch;
2172 	bool pn_invalid, qos, first_msdu;
2173 	u32 tid, rx_desc_info;
2174 
2175 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2176 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2177 
2178 	spin_lock_bh(&ar->data_lock);
2179 	peer = ath10k_peer_find_by_id(ar, peer_id);
2180 	spin_unlock_bh(&ar->data_lock);
2181 	if (!peer && peer_id != HTT_INVALID_PEERID)
2182 		ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
2183 
2184 	if (!peer)
2185 		return true;
2186 
2187 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2188 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2189 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges_hl(rx);
2190 	fw_desc = &rx->fw_desc;
2191 	rx_desc_len = fw_desc->len;
2192 
2193 	/* I have not yet seen any case where num_mpdu_ranges > 1.
2194 	 * qcacld does not seem handle that case either, so we introduce the
2195 	 * same limitiation here as well.
2196 	 */
2197 	if (num_mpdu_ranges > 1)
2198 		ath10k_warn(ar,
2199 			    "Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
2200 			    num_mpdu_ranges);
2201 
2202 	if (mpdu_ranges->mpdu_range_status !=
2203 	    HTT_RX_IND_MPDU_STATUS_OK &&
2204 	    mpdu_ranges->mpdu_range_status !=
2205 	    HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) {
2206 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt mpdu_range_status %d\n",
2207 			   mpdu_ranges->mpdu_range_status);
2208 		goto err;
2209 	}
2210 
2211 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2212 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2213 
2214 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2215 		sec_index = HTT_TXRX_SEC_MCAST;
2216 	else
2217 		sec_index = HTT_TXRX_SEC_UCAST;
2218 
2219 	sec_type = peer->rx_pn[sec_index].sec_type;
2220 	first_msdu = rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU;
2221 
2222 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2223 
2224 	if (check_pn_type == HTT_RX_PN_CHECK && tid >= IEEE80211_NUM_TIDS) {
2225 		spin_lock_bh(&ar->data_lock);
2226 		pn_invalid = ath10k_htt_rx_pn_check_replay_hl(ar, peer, rx);
2227 		spin_unlock_bh(&ar->data_lock);
2228 
2229 		if (pn_invalid)
2230 			goto err;
2231 	}
2232 
2233 	/* Strip off all headers before the MAC header before delivery to
2234 	 * mac80211
2235 	 */
2236 	tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
2237 		      sizeof(rx->ppdu) + sizeof(rx->prefix) +
2238 		      sizeof(rx->fw_desc) +
2239 		      sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
2240 
2241 	skb_pull(skb, tot_hdr_len);
2242 
2243 	hdr = (struct ieee80211_hdr *)skb->data;
2244 	qos = ieee80211_is_data_qos(hdr->frame_control);
2245 
2246 	rx_status = IEEE80211_SKB_RXCB(skb);
2247 	memset(rx_status, 0, sizeof(*rx_status));
2248 
2249 	if (rx->ppdu.combined_rssi == 0) {
2250 		/* SDIO firmware does not provide signal */
2251 		rx_status->signal = 0;
2252 		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2253 	} else {
2254 		rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
2255 			rx->ppdu.combined_rssi;
2256 		rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
2257 	}
2258 
2259 	spin_lock_bh(&ar->data_lock);
2260 	ch = ar->scan_channel;
2261 	if (!ch)
2262 		ch = ar->rx_channel;
2263 	if (!ch)
2264 		ch = ath10k_htt_rx_h_any_channel(ar);
2265 	if (!ch)
2266 		ch = ar->tgt_oper_chan;
2267 	spin_unlock_bh(&ar->data_lock);
2268 
2269 	if (ch) {
2270 		rx_status->band = ch->band;
2271 		rx_status->freq = ch->center_freq;
2272 	}
2273 	if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
2274 		rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
2275 	else
2276 		rx_status->flag |= RX_FLAG_AMSDU_MORE;
2277 
2278 	/* Not entirely sure about this, but all frames from the chipset has
2279 	 * the protected flag set even though they have already been decrypted.
2280 	 * Unmasking this flag is necessary in order for mac80211 not to drop
2281 	 * the frame.
2282 	 * TODO: Verify this is always the case or find out a way to check
2283 	 * if there has been hw decryption.
2284 	 */
2285 	if (ieee80211_has_protected(hdr->frame_control)) {
2286 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2287 		rx_status->flag |= RX_FLAG_DECRYPTED |
2288 				   RX_FLAG_IV_STRIPPED |
2289 				   RX_FLAG_MMIC_STRIPPED;
2290 
2291 		if (tid < IEEE80211_NUM_TIDS &&
2292 		    first_msdu &&
2293 		    check_pn_type == HTT_RX_PN_CHECK &&
2294 		   (sec_type == HTT_SECURITY_AES_CCMP ||
2295 		    sec_type == HTT_SECURITY_TKIP ||
2296 		    sec_type == HTT_SECURITY_TKIP_NOMIC)) {
2297 			u8 offset, *ivp, i;
2298 			s8 keyidx = 0;
2299 			__le64 pn48 = cpu_to_le64(new_pn.pn48);
2300 
2301 			hdr = (struct ieee80211_hdr *)skb->data;
2302 			offset = ieee80211_hdrlen(hdr->frame_control);
2303 			hdr->frame_control |= __cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2304 			rx_status->flag &= ~RX_FLAG_IV_STRIPPED;
2305 
2306 			memmove(skb->data - IEEE80211_CCMP_HDR_LEN,
2307 				skb->data, offset);
2308 			skb_push(skb, IEEE80211_CCMP_HDR_LEN);
2309 			ivp = skb->data + offset;
2310 			memset(skb->data + offset, 0, IEEE80211_CCMP_HDR_LEN);
2311 			/* Ext IV */
2312 			ivp[IEEE80211_WEP_IV_LEN - 1] |= ATH10K_IEEE80211_EXTIV;
2313 
2314 			for (i = 0; i < ARRAY_SIZE(peer->keys); i++) {
2315 				if (peer->keys[i] &&
2316 				    peer->keys[i]->flags & IEEE80211_KEY_FLAG_PAIRWISE)
2317 					keyidx = peer->keys[i]->keyidx;
2318 			}
2319 
2320 			/* Key ID */
2321 			ivp[IEEE80211_WEP_IV_LEN - 1] |= keyidx << 6;
2322 
2323 			if (sec_type == HTT_SECURITY_AES_CCMP) {
2324 				rx_status->flag |= RX_FLAG_MIC_STRIPPED;
2325 				/* pn 0, pn 1 */
2326 				memcpy(skb->data + offset, &pn48, 2);
2327 				/* pn 1, pn 3 , pn 34 , pn 5 */
2328 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2329 			} else {
2330 				rx_status->flag |= RX_FLAG_ICV_STRIPPED;
2331 				/* TSC 0 */
2332 				memcpy(skb->data + offset + 2, &pn48, 1);
2333 				/* TSC 1 */
2334 				memcpy(skb->data + offset, ((u8 *)&pn48) + 1, 1);
2335 				/* TSC 2 , TSC 3 , TSC 4 , TSC 5*/
2336 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2337 			}
2338 		}
2339 	}
2340 
2341 	if (tkip_mic_type == HTT_RX_TKIP_MIC)
2342 		rx_status->flag &= ~RX_FLAG_IV_STRIPPED &
2343 				   ~RX_FLAG_MMIC_STRIPPED;
2344 
2345 	if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
2346 		rx_status->flag |= RX_FLAG_MMIC_ERROR;
2347 
2348 	if (!qos && tid < IEEE80211_NUM_TIDS) {
2349 		u8 offset;
2350 		__le16 qos_ctrl = 0;
2351 
2352 		hdr = (struct ieee80211_hdr *)skb->data;
2353 		offset = ieee80211_hdrlen(hdr->frame_control);
2354 
2355 		hdr->frame_control |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2356 		memmove(skb->data - IEEE80211_QOS_CTL_LEN, skb->data, offset);
2357 		skb_push(skb, IEEE80211_QOS_CTL_LEN);
2358 		qos_ctrl = cpu_to_le16(tid);
2359 		memcpy(skb->data + offset, &qos_ctrl, IEEE80211_QOS_CTL_LEN);
2360 	}
2361 
2362 	if (ar->napi.dev)
2363 		ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
2364 	else
2365 		ieee80211_rx_ni(ar->hw, skb);
2366 
2367 	/* We have delivered the skb to the upper layers (mac80211) so we
2368 	 * must not free it.
2369 	 */
2370 	return false;
2371 err:
2372 	/* Tell the caller that it must free the skb since we have not
2373 	 * consumed it
2374 	 */
2375 	return true;
2376 }
2377 
2378 static int ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff *skb,
2379 					       u16 head_len,
2380 					       u16 hdr_len)
2381 {
2382 	u8 *ivp, *orig_hdr;
2383 
2384 	orig_hdr = skb->data;
2385 	ivp = orig_hdr + hdr_len + head_len;
2386 
2387 	/* the ExtIV bit is always set to 1 for TKIP */
2388 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2389 		return -EINVAL;
2390 
2391 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2392 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2393 	skb_trim(skb, skb->len - ATH10K_IEEE80211_TKIP_MICLEN);
2394 	return 0;
2395 }
2396 
2397 static int ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff *skb,
2398 						 u16 head_len,
2399 						 u16 hdr_len)
2400 {
2401 	u8 *ivp, *orig_hdr;
2402 
2403 	orig_hdr = skb->data;
2404 	ivp = orig_hdr + hdr_len + head_len;
2405 
2406 	/* the ExtIV bit is always set to 1 for TKIP */
2407 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2408 		return -EINVAL;
2409 
2410 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2411 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2412 	skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
2413 	return 0;
2414 }
2415 
2416 static int ath10k_htt_rx_frag_ccmp_decap(struct sk_buff *skb,
2417 					 u16 head_len,
2418 					 u16 hdr_len)
2419 {
2420 	u8 *ivp, *orig_hdr;
2421 
2422 	orig_hdr = skb->data;
2423 	ivp = orig_hdr + hdr_len + head_len;
2424 
2425 	/* the ExtIV bit is always set to 1 for CCMP */
2426 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2427 		return -EINVAL;
2428 
2429 	skb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN);
2430 	memmove(orig_hdr + IEEE80211_CCMP_HDR_LEN, orig_hdr, head_len + hdr_len);
2431 	skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
2432 	return 0;
2433 }
2434 
2435 static int ath10k_htt_rx_frag_wep_decap(struct sk_buff *skb,
2436 					u16 head_len,
2437 					u16 hdr_len)
2438 {
2439 	u8 *orig_hdr;
2440 
2441 	orig_hdr = skb->data;
2442 
2443 	memmove(orig_hdr + IEEE80211_WEP_IV_LEN,
2444 		orig_hdr, head_len + hdr_len);
2445 	skb_pull(skb, IEEE80211_WEP_IV_LEN);
2446 	skb_trim(skb, skb->len - IEEE80211_WEP_ICV_LEN);
2447 	return 0;
2448 }
2449 
2450 static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
2451 					      struct htt_rx_fragment_indication *rx,
2452 					      struct sk_buff *skb)
2453 {
2454 	struct ath10k *ar = htt->ar;
2455 	enum htt_rx_tkip_demic_type tkip_mic = HTT_RX_NON_TKIP_MIC;
2456 	enum htt_txrx_sec_cast_type sec_index;
2457 	struct htt_rx_indication_hl *rx_hl;
2458 	enum htt_security_types sec_type;
2459 	u32 tid, frag, seq, rx_desc_info;
2460 	union htt_rx_pn_t new_pn = {0};
2461 	struct htt_hl_rx_desc *rx_desc;
2462 	u16 peer_id, sc, hdr_space;
2463 	union htt_rx_pn_t *last_pn;
2464 	struct ieee80211_hdr *hdr;
2465 	int ret, num_mpdu_ranges;
2466 	struct ath10k_peer *peer;
2467 	struct htt_resp *resp;
2468 	size_t tot_hdr_len;
2469 
2470 	resp = (struct htt_resp *)(skb->data + HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2471 	skb_pull(skb, HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2472 	skb_trim(skb, skb->len - FCS_LEN);
2473 
2474 	peer_id = __le16_to_cpu(rx->peer_id);
2475 	rx_hl = (struct htt_rx_indication_hl *)(&resp->rx_ind_hl);
2476 
2477 	spin_lock_bh(&ar->data_lock);
2478 	peer = ath10k_peer_find_by_id(ar, peer_id);
2479 	if (!peer) {
2480 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer: %u\n", peer_id);
2481 		goto err;
2482 	}
2483 
2484 	num_mpdu_ranges = MS(__le32_to_cpu(rx_hl->hdr.info1),
2485 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2486 
2487 	tot_hdr_len = sizeof(struct htt_resp_hdr) +
2488 		      sizeof(rx_hl->hdr) +
2489 		      sizeof(rx_hl->ppdu) +
2490 		      sizeof(rx_hl->prefix) +
2491 		      sizeof(rx_hl->fw_desc) +
2492 		      sizeof(struct htt_rx_indication_mpdu_range) * num_mpdu_ranges;
2493 
2494 	tid =  MS(rx_hl->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2495 	rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
2496 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2497 
2498 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
2499 		spin_unlock_bh(&ar->data_lock);
2500 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2501 						    HTT_RX_NON_PN_CHECK,
2502 						    HTT_RX_NON_TKIP_MIC);
2503 	}
2504 
2505 	hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
2506 
2507 	if (ieee80211_has_retry(hdr->frame_control))
2508 		goto err;
2509 
2510 	hdr_space = ieee80211_hdrlen(hdr->frame_control);
2511 	sc = __le16_to_cpu(hdr->seq_ctrl);
2512 	seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2513 	frag = sc & IEEE80211_SCTL_FRAG;
2514 
2515 	sec_index = MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST) ?
2516 		    HTT_TXRX_SEC_MCAST : HTT_TXRX_SEC_UCAST;
2517 	sec_type = peer->rx_pn[sec_index].sec_type;
2518 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2519 
2520 	switch (sec_type) {
2521 	case HTT_SECURITY_TKIP:
2522 		tkip_mic = HTT_RX_TKIP_MIC;
2523 		ret = ath10k_htt_rx_frag_tkip_decap_withmic(skb,
2524 							    tot_hdr_len +
2525 							    rx_hl->fw_desc.len,
2526 							    hdr_space);
2527 		if (ret)
2528 			goto err;
2529 		break;
2530 	case HTT_SECURITY_TKIP_NOMIC:
2531 		ret = ath10k_htt_rx_frag_tkip_decap_nomic(skb,
2532 							  tot_hdr_len +
2533 							  rx_hl->fw_desc.len,
2534 							  hdr_space);
2535 		if (ret)
2536 			goto err;
2537 		break;
2538 	case HTT_SECURITY_AES_CCMP:
2539 		ret = ath10k_htt_rx_frag_ccmp_decap(skb,
2540 						    tot_hdr_len + rx_hl->fw_desc.len,
2541 						    hdr_space);
2542 		if (ret)
2543 			goto err;
2544 		break;
2545 	case HTT_SECURITY_WEP128:
2546 	case HTT_SECURITY_WEP104:
2547 	case HTT_SECURITY_WEP40:
2548 		ret = ath10k_htt_rx_frag_wep_decap(skb,
2549 						   tot_hdr_len + rx_hl->fw_desc.len,
2550 						   hdr_space);
2551 		if (ret)
2552 			goto err;
2553 		break;
2554 	default:
2555 		break;
2556 	}
2557 
2558 	resp = (struct htt_resp *)(skb->data);
2559 
2560 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2561 	    sec_type != HTT_SECURITY_TKIP &&
2562 	    sec_type != HTT_SECURITY_TKIP_NOMIC) {
2563 		spin_unlock_bh(&ar->data_lock);
2564 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2565 						    HTT_RX_NON_PN_CHECK,
2566 						    HTT_RX_NON_TKIP_MIC);
2567 	}
2568 
2569 	last_pn = &peer->frag_tids_last_pn[tid];
2570 
2571 	if (frag == 0) {
2572 		if (ath10k_htt_rx_pn_check_replay_hl(ar, peer, &resp->rx_ind_hl))
2573 			goto err;
2574 
2575 		last_pn->pn48 = new_pn.pn48;
2576 		peer->frag_tids_seq[tid] = seq;
2577 	} else if (sec_type == HTT_SECURITY_AES_CCMP) {
2578 		if (seq != peer->frag_tids_seq[tid])
2579 			goto err;
2580 
2581 		if (new_pn.pn48 != last_pn->pn48 + 1)
2582 			goto err;
2583 
2584 		last_pn->pn48 = new_pn.pn48;
2585 		last_pn = &peer->tids_last_pn[tid];
2586 		last_pn->pn48 = new_pn.pn48;
2587 	}
2588 
2589 	spin_unlock_bh(&ar->data_lock);
2590 
2591 	return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2592 					    HTT_RX_NON_PN_CHECK, tkip_mic);
2593 
2594 err:
2595 	spin_unlock_bh(&ar->data_lock);
2596 
2597 	/* Tell the caller that it must free the skb since we have not
2598 	 * consumed it
2599 	 */
2600 	return true;
2601 }
2602 
2603 static void ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt *htt,
2604 					 struct htt_rx_indication *rx)
2605 {
2606 	struct ath10k *ar = htt->ar;
2607 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2608 	int num_mpdu_ranges;
2609 	int i, mpdu_count = 0;
2610 	u16 peer_id;
2611 	u8 tid;
2612 
2613 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2614 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2615 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2616 	tid =  MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2617 
2618 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
2619 
2620 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
2621 			rx, struct_size(rx, mpdu_ranges, num_mpdu_ranges));
2622 
2623 	for (i = 0; i < num_mpdu_ranges; i++)
2624 		mpdu_count += mpdu_ranges[i].mpdu_count;
2625 
2626 	atomic_add(mpdu_count, &htt->num_mpdus_ready);
2627 
2628 	ath10k_sta_update_rx_tid_stats_ampdu(ar, peer_id, tid, mpdu_ranges,
2629 					     num_mpdu_ranges);
2630 }
2631 
2632 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
2633 				       struct sk_buff *skb)
2634 {
2635 	struct ath10k_htt *htt = &ar->htt;
2636 	struct htt_resp *resp = (struct htt_resp *)skb->data;
2637 	struct htt_tx_done tx_done = {};
2638 	int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
2639 	__le16 msdu_id, *msdus;
2640 	bool rssi_enabled = false;
2641 	u8 msdu_count = 0, num_airtime_records, tid;
2642 	int i, htt_pad = 0;
2643 	struct htt_data_tx_compl_ppdu_dur *ppdu_info;
2644 	struct ath10k_peer *peer;
2645 	u16 ppdu_info_offset = 0, peer_id;
2646 	u32 tx_duration;
2647 
2648 	switch (status) {
2649 	case HTT_DATA_TX_STATUS_NO_ACK:
2650 		tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2651 		break;
2652 	case HTT_DATA_TX_STATUS_OK:
2653 		tx_done.status = HTT_TX_COMPL_STATE_ACK;
2654 		break;
2655 	case HTT_DATA_TX_STATUS_DISCARD:
2656 	case HTT_DATA_TX_STATUS_POSTPONE:
2657 	case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
2658 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2659 		break;
2660 	default:
2661 		ath10k_warn(ar, "unhandled tx completion status %d\n", status);
2662 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2663 		break;
2664 	}
2665 
2666 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
2667 		   resp->data_tx_completion.num_msdus);
2668 
2669 	msdu_count = resp->data_tx_completion.num_msdus;
2670 	msdus = resp->data_tx_completion.msdus;
2671 	rssi_enabled = ath10k_is_rssi_enable(&ar->hw_params, resp);
2672 
2673 	if (rssi_enabled)
2674 		htt_pad = ath10k_tx_data_rssi_get_pad_bytes(&ar->hw_params,
2675 							    resp);
2676 
2677 	for (i = 0; i < msdu_count; i++) {
2678 		msdu_id = msdus[i];
2679 		tx_done.msdu_id = __le16_to_cpu(msdu_id);
2680 
2681 		if (rssi_enabled) {
2682 			/* Total no of MSDUs should be even,
2683 			 * if odd MSDUs are sent firmware fills
2684 			 * last msdu id with 0xffff
2685 			 */
2686 			if (msdu_count & 0x01) {
2687 				msdu_id = msdus[msdu_count +  i + 1 + htt_pad];
2688 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2689 			} else {
2690 				msdu_id = msdus[msdu_count +  i + htt_pad];
2691 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2692 			}
2693 		}
2694 
2695 		/* kfifo_put: In practice firmware shouldn't fire off per-CE
2696 		 * interrupt and main interrupt (MSI/-X range case) for the same
2697 		 * HTC service so it should be safe to use kfifo_put w/o lock.
2698 		 *
2699 		 * From kfifo_put() documentation:
2700 		 *  Note that with only one concurrent reader and one concurrent
2701 		 *  writer, you don't need extra locking to use these macro.
2702 		 */
2703 		if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
2704 			ath10k_txrx_tx_unref(htt, &tx_done);
2705 		} else if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
2706 			ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
2707 				    tx_done.msdu_id, tx_done.status);
2708 			ath10k_txrx_tx_unref(htt, &tx_done);
2709 		}
2710 	}
2711 
2712 	if (!(resp->data_tx_completion.flags2 & HTT_TX_CMPL_FLAG_PPDU_DURATION_PRESENT))
2713 		return;
2714 
2715 	ppdu_info_offset = (msdu_count & 0x01) ? msdu_count + 1 : msdu_count;
2716 
2717 	if (rssi_enabled)
2718 		ppdu_info_offset += ppdu_info_offset;
2719 
2720 	if (resp->data_tx_completion.flags2 &
2721 	    (HTT_TX_CMPL_FLAG_PPID_PRESENT | HTT_TX_CMPL_FLAG_PA_PRESENT))
2722 		ppdu_info_offset += 2;
2723 
2724 	ppdu_info = (struct htt_data_tx_compl_ppdu_dur *)&msdus[ppdu_info_offset];
2725 	num_airtime_records = FIELD_GET(HTT_TX_COMPL_PPDU_DUR_INFO0_NUM_ENTRIES_MASK,
2726 					__le32_to_cpu(ppdu_info->info0));
2727 
2728 	for (i = 0; i < num_airtime_records; i++) {
2729 		struct htt_data_tx_ppdu_dur *ppdu_dur;
2730 		u32 info0;
2731 
2732 		ppdu_dur = &ppdu_info->ppdu_dur[i];
2733 		info0 = __le32_to_cpu(ppdu_dur->info0);
2734 
2735 		peer_id = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_PEER_ID_MASK,
2736 				    info0);
2737 		rcu_read_lock();
2738 		spin_lock_bh(&ar->data_lock);
2739 
2740 		peer = ath10k_peer_find_by_id(ar, peer_id);
2741 		if (!peer || !peer->sta) {
2742 			spin_unlock_bh(&ar->data_lock);
2743 			rcu_read_unlock();
2744 			continue;
2745 		}
2746 
2747 		tid = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_TID_MASK, info0) &
2748 						IEEE80211_QOS_CTL_TID_MASK;
2749 		tx_duration = __le32_to_cpu(ppdu_dur->tx_duration);
2750 
2751 		ieee80211_sta_register_airtime(peer->sta, tid, tx_duration, 0);
2752 
2753 		spin_unlock_bh(&ar->data_lock);
2754 		rcu_read_unlock();
2755 	}
2756 }
2757 
2758 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
2759 {
2760 	struct htt_rx_addba *ev = &resp->rx_addba;
2761 	struct ath10k_peer *peer;
2762 	struct ath10k_vif *arvif;
2763 	u16 info0, tid, peer_id;
2764 
2765 	info0 = __le16_to_cpu(ev->info0);
2766 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
2767 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
2768 
2769 	ath10k_dbg(ar, ATH10K_DBG_HTT,
2770 		   "htt rx addba tid %hu peer_id %hu size %hhu\n",
2771 		   tid, peer_id, ev->window_size);
2772 
2773 	spin_lock_bh(&ar->data_lock);
2774 	peer = ath10k_peer_find_by_id(ar, peer_id);
2775 	if (!peer) {
2776 		ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
2777 			    peer_id);
2778 		spin_unlock_bh(&ar->data_lock);
2779 		return;
2780 	}
2781 
2782 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
2783 	if (!arvif) {
2784 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
2785 			    peer->vdev_id);
2786 		spin_unlock_bh(&ar->data_lock);
2787 		return;
2788 	}
2789 
2790 	ath10k_dbg(ar, ATH10K_DBG_HTT,
2791 		   "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
2792 		   peer->addr, tid, ev->window_size);
2793 
2794 	ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
2795 	spin_unlock_bh(&ar->data_lock);
2796 }
2797 
2798 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
2799 {
2800 	struct htt_rx_delba *ev = &resp->rx_delba;
2801 	struct ath10k_peer *peer;
2802 	struct ath10k_vif *arvif;
2803 	u16 info0, tid, peer_id;
2804 
2805 	info0 = __le16_to_cpu(ev->info0);
2806 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
2807 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
2808 
2809 	ath10k_dbg(ar, ATH10K_DBG_HTT,
2810 		   "htt rx delba tid %hu peer_id %hu\n",
2811 		   tid, peer_id);
2812 
2813 	spin_lock_bh(&ar->data_lock);
2814 	peer = ath10k_peer_find_by_id(ar, peer_id);
2815 	if (!peer) {
2816 		ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
2817 			    peer_id);
2818 		spin_unlock_bh(&ar->data_lock);
2819 		return;
2820 	}
2821 
2822 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
2823 	if (!arvif) {
2824 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
2825 			    peer->vdev_id);
2826 		spin_unlock_bh(&ar->data_lock);
2827 		return;
2828 	}
2829 
2830 	ath10k_dbg(ar, ATH10K_DBG_HTT,
2831 		   "htt rx stop rx ba session sta %pM tid %hu\n",
2832 		   peer->addr, tid);
2833 
2834 	ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
2835 	spin_unlock_bh(&ar->data_lock);
2836 }
2837 
2838 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
2839 				       struct sk_buff_head *amsdu)
2840 {
2841 	struct sk_buff *msdu;
2842 	struct htt_rx_desc *rxd;
2843 
2844 	if (skb_queue_empty(list))
2845 		return -ENOBUFS;
2846 
2847 	if (WARN_ON(!skb_queue_empty(amsdu)))
2848 		return -EINVAL;
2849 
2850 	while ((msdu = __skb_dequeue(list))) {
2851 		__skb_queue_tail(amsdu, msdu);
2852 
2853 		rxd = (void *)msdu->data - sizeof(*rxd);
2854 		if (rxd->msdu_end.common.info0 &
2855 		    __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
2856 			break;
2857 	}
2858 
2859 	msdu = skb_peek_tail(amsdu);
2860 	rxd = (void *)msdu->data - sizeof(*rxd);
2861 	if (!(rxd->msdu_end.common.info0 &
2862 	      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
2863 		skb_queue_splice_init(amsdu, list);
2864 		return -EAGAIN;
2865 	}
2866 
2867 	return 0;
2868 }
2869 
2870 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
2871 					    struct sk_buff *skb)
2872 {
2873 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2874 
2875 	if (!ieee80211_has_protected(hdr->frame_control))
2876 		return;
2877 
2878 	/* Offloaded frames are already decrypted but firmware insists they are
2879 	 * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
2880 	 * will drop the frame.
2881 	 */
2882 
2883 	hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2884 	status->flag |= RX_FLAG_DECRYPTED |
2885 			RX_FLAG_IV_STRIPPED |
2886 			RX_FLAG_MMIC_STRIPPED;
2887 }
2888 
2889 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
2890 				       struct sk_buff_head *list)
2891 {
2892 	struct ath10k_htt *htt = &ar->htt;
2893 	struct ieee80211_rx_status *status = &htt->rx_status;
2894 	struct htt_rx_offload_msdu *rx;
2895 	struct sk_buff *msdu;
2896 	size_t offset;
2897 
2898 	while ((msdu = __skb_dequeue(list))) {
2899 		/* Offloaded frames don't have Rx descriptor. Instead they have
2900 		 * a short meta information header.
2901 		 */
2902 
2903 		rx = (void *)msdu->data;
2904 
2905 		skb_put(msdu, sizeof(*rx));
2906 		skb_pull(msdu, sizeof(*rx));
2907 
2908 		if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
2909 			ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
2910 			dev_kfree_skb_any(msdu);
2911 			continue;
2912 		}
2913 
2914 		skb_put(msdu, __le16_to_cpu(rx->msdu_len));
2915 
2916 		/* Offloaded rx header length isn't multiple of 2 nor 4 so the
2917 		 * actual payload is unaligned. Align the frame.  Otherwise
2918 		 * mac80211 complains.  This shouldn't reduce performance much
2919 		 * because these offloaded frames are rare.
2920 		 */
2921 		offset = 4 - ((unsigned long)msdu->data & 3);
2922 		skb_put(msdu, offset);
2923 		memmove(msdu->data + offset, msdu->data, msdu->len);
2924 		skb_pull(msdu, offset);
2925 
2926 		/* FIXME: The frame is NWifi. Re-construct QoS Control
2927 		 * if possible later.
2928 		 */
2929 
2930 		memset(status, 0, sizeof(*status));
2931 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2932 
2933 		ath10k_htt_rx_h_rx_offload_prot(status, msdu);
2934 		ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
2935 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
2936 	}
2937 }
2938 
2939 static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
2940 {
2941 	struct ath10k_htt *htt = &ar->htt;
2942 	struct htt_resp *resp = (void *)skb->data;
2943 	struct ieee80211_rx_status *status = &htt->rx_status;
2944 	struct sk_buff_head list;
2945 	struct sk_buff_head amsdu;
2946 	u16 peer_id;
2947 	u16 msdu_count;
2948 	u8 vdev_id;
2949 	u8 tid;
2950 	bool offload;
2951 	bool frag;
2952 	int ret;
2953 
2954 	lockdep_assert_held(&htt->rx_ring.lock);
2955 
2956 	if (htt->rx_confused)
2957 		return -EIO;
2958 
2959 	skb_pull(skb, sizeof(resp->hdr));
2960 	skb_pull(skb, sizeof(resp->rx_in_ord_ind));
2961 
2962 	peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
2963 	msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
2964 	vdev_id = resp->rx_in_ord_ind.vdev_id;
2965 	tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
2966 	offload = !!(resp->rx_in_ord_ind.info &
2967 			HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
2968 	frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
2969 
2970 	ath10k_dbg(ar, ATH10K_DBG_HTT,
2971 		   "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
2972 		   vdev_id, peer_id, tid, offload, frag, msdu_count);
2973 
2974 	if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs32)) {
2975 		ath10k_warn(ar, "dropping invalid in order rx indication\n");
2976 		return -EINVAL;
2977 	}
2978 
2979 	/* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
2980 	 * extracted and processed.
2981 	 */
2982 	__skb_queue_head_init(&list);
2983 	if (ar->hw_params.target_64bit)
2984 		ret = ath10k_htt_rx_pop_paddr64_list(htt, &resp->rx_in_ord_ind,
2985 						     &list);
2986 	else
2987 		ret = ath10k_htt_rx_pop_paddr32_list(htt, &resp->rx_in_ord_ind,
2988 						     &list);
2989 
2990 	if (ret < 0) {
2991 		ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
2992 		htt->rx_confused = true;
2993 		return -EIO;
2994 	}
2995 
2996 	/* Offloaded frames are very different and need to be handled
2997 	 * separately.
2998 	 */
2999 	if (offload)
3000 		ath10k_htt_rx_h_rx_offload(ar, &list);
3001 
3002 	while (!skb_queue_empty(&list)) {
3003 		__skb_queue_head_init(&amsdu);
3004 		ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
3005 		switch (ret) {
3006 		case 0:
3007 			/* Note: The in-order indication may report interleaved
3008 			 * frames from different PPDUs meaning reported rx rate
3009 			 * to mac80211 isn't accurate/reliable. It's still
3010 			 * better to report something than nothing though. This
3011 			 * should still give an idea about rx rate to the user.
3012 			 */
3013 			ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
3014 			ath10k_htt_rx_h_filter(ar, &amsdu, status, NULL);
3015 			ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false, NULL,
3016 					     NULL);
3017 			ath10k_htt_rx_h_enqueue(ar, &amsdu, status);
3018 			break;
3019 		case -EAGAIN:
3020 			/* fall through */
3021 		default:
3022 			/* Should not happen. */
3023 			ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
3024 			htt->rx_confused = true;
3025 			__skb_queue_purge(&list);
3026 			return -EIO;
3027 		}
3028 	}
3029 	return ret;
3030 }
3031 
3032 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
3033 						   const __le32 *resp_ids,
3034 						   int num_resp_ids)
3035 {
3036 	int i;
3037 	u32 resp_id;
3038 
3039 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
3040 		   num_resp_ids);
3041 
3042 	for (i = 0; i < num_resp_ids; i++) {
3043 		resp_id = le32_to_cpu(resp_ids[i]);
3044 
3045 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
3046 			   resp_id);
3047 
3048 		/* TODO: free resp_id */
3049 	}
3050 }
3051 
3052 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
3053 {
3054 	struct ieee80211_hw *hw = ar->hw;
3055 	struct ieee80211_txq *txq;
3056 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3057 	struct htt_tx_fetch_record *record;
3058 	size_t len;
3059 	size_t max_num_bytes;
3060 	size_t max_num_msdus;
3061 	size_t num_bytes;
3062 	size_t num_msdus;
3063 	const __le32 *resp_ids;
3064 	u16 num_records;
3065 	u16 num_resp_ids;
3066 	u16 peer_id;
3067 	u8 tid;
3068 	int ret;
3069 	int i;
3070 	bool may_tx;
3071 
3072 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
3073 
3074 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
3075 	if (unlikely(skb->len < len)) {
3076 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
3077 		return;
3078 	}
3079 
3080 	num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
3081 	num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
3082 
3083 	len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
3084 	len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
3085 
3086 	if (unlikely(skb->len < len)) {
3087 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
3088 		return;
3089 	}
3090 
3091 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %hu num resps %hu seq %hu\n",
3092 		   num_records, num_resp_ids,
3093 		   le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
3094 
3095 	if (!ar->htt.tx_q_state.enabled) {
3096 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
3097 		return;
3098 	}
3099 
3100 	if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
3101 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
3102 		return;
3103 	}
3104 
3105 	rcu_read_lock();
3106 
3107 	for (i = 0; i < num_records; i++) {
3108 		record = &resp->tx_fetch_ind.records[i];
3109 		peer_id = MS(le16_to_cpu(record->info),
3110 			     HTT_TX_FETCH_RECORD_INFO_PEER_ID);
3111 		tid = MS(le16_to_cpu(record->info),
3112 			 HTT_TX_FETCH_RECORD_INFO_TID);
3113 		max_num_msdus = le16_to_cpu(record->num_msdus);
3114 		max_num_bytes = le32_to_cpu(record->num_bytes);
3115 
3116 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %hu tid %hhu msdus %zu bytes %zu\n",
3117 			   i, peer_id, tid, max_num_msdus, max_num_bytes);
3118 
3119 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3120 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3121 			ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
3122 				    peer_id, tid);
3123 			continue;
3124 		}
3125 
3126 		spin_lock_bh(&ar->data_lock);
3127 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3128 		spin_unlock_bh(&ar->data_lock);
3129 
3130 		/* It is okay to release the lock and use txq because RCU read
3131 		 * lock is held.
3132 		 */
3133 
3134 		if (unlikely(!txq)) {
3135 			ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
3136 				    peer_id, tid);
3137 			continue;
3138 		}
3139 
3140 		num_msdus = 0;
3141 		num_bytes = 0;
3142 
3143 		ieee80211_txq_schedule_start(hw, txq->ac);
3144 		may_tx = ieee80211_txq_may_transmit(hw, txq);
3145 		while (num_msdus < max_num_msdus &&
3146 		       num_bytes < max_num_bytes) {
3147 			if (!may_tx)
3148 				break;
3149 
3150 			ret = ath10k_mac_tx_push_txq(hw, txq);
3151 			if (ret < 0)
3152 				break;
3153 
3154 			num_msdus++;
3155 			num_bytes += ret;
3156 		}
3157 		ieee80211_return_txq(hw, txq, false);
3158 		ieee80211_txq_schedule_end(hw, txq->ac);
3159 
3160 		record->num_msdus = cpu_to_le16(num_msdus);
3161 		record->num_bytes = cpu_to_le32(num_bytes);
3162 
3163 		ath10k_htt_tx_txq_recalc(hw, txq);
3164 	}
3165 
3166 	rcu_read_unlock();
3167 
3168 	resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
3169 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
3170 
3171 	ret = ath10k_htt_tx_fetch_resp(ar,
3172 				       resp->tx_fetch_ind.token,
3173 				       resp->tx_fetch_ind.fetch_seq_num,
3174 				       resp->tx_fetch_ind.records,
3175 				       num_records);
3176 	if (unlikely(ret)) {
3177 		ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
3178 			    le32_to_cpu(resp->tx_fetch_ind.token), ret);
3179 		/* FIXME: request fw restart */
3180 	}
3181 
3182 	ath10k_htt_tx_txq_sync(ar);
3183 }
3184 
3185 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
3186 					   struct sk_buff *skb)
3187 {
3188 	const struct htt_resp *resp = (void *)skb->data;
3189 	size_t len;
3190 	int num_resp_ids;
3191 
3192 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
3193 
3194 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
3195 	if (unlikely(skb->len < len)) {
3196 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
3197 		return;
3198 	}
3199 
3200 	num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
3201 	len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
3202 
3203 	if (unlikely(skb->len < len)) {
3204 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
3205 		return;
3206 	}
3207 
3208 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
3209 					       resp->tx_fetch_confirm.resp_ids,
3210 					       num_resp_ids);
3211 }
3212 
3213 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
3214 					     struct sk_buff *skb)
3215 {
3216 	const struct htt_resp *resp = (void *)skb->data;
3217 	const struct htt_tx_mode_switch_record *record;
3218 	struct ieee80211_txq *txq;
3219 	struct ath10k_txq *artxq;
3220 	size_t len;
3221 	size_t num_records;
3222 	enum htt_tx_mode_switch_mode mode;
3223 	bool enable;
3224 	u16 info0;
3225 	u16 info1;
3226 	u16 threshold;
3227 	u16 peer_id;
3228 	u8 tid;
3229 	int i;
3230 
3231 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
3232 
3233 	len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
3234 	if (unlikely(skb->len < len)) {
3235 		ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
3236 		return;
3237 	}
3238 
3239 	info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
3240 	info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
3241 
3242 	enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
3243 	num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3244 	mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
3245 	threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3246 
3247 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3248 		   "htt rx tx mode switch ind info0 0x%04hx info1 0x%04hx enable %d num records %zd mode %d threshold %hu\n",
3249 		   info0, info1, enable, num_records, mode, threshold);
3250 
3251 	len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
3252 
3253 	if (unlikely(skb->len < len)) {
3254 		ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
3255 		return;
3256 	}
3257 
3258 	switch (mode) {
3259 	case HTT_TX_MODE_SWITCH_PUSH:
3260 	case HTT_TX_MODE_SWITCH_PUSH_PULL:
3261 		break;
3262 	default:
3263 		ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
3264 			    mode);
3265 		return;
3266 	}
3267 
3268 	if (!enable)
3269 		return;
3270 
3271 	ar->htt.tx_q_state.enabled = enable;
3272 	ar->htt.tx_q_state.mode = mode;
3273 	ar->htt.tx_q_state.num_push_allowed = threshold;
3274 
3275 	rcu_read_lock();
3276 
3277 	for (i = 0; i < num_records; i++) {
3278 		record = &resp->tx_mode_switch_ind.records[i];
3279 		info0 = le16_to_cpu(record->info0);
3280 		peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
3281 		tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
3282 
3283 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3284 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3285 			ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
3286 				    peer_id, tid);
3287 			continue;
3288 		}
3289 
3290 		spin_lock_bh(&ar->data_lock);
3291 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3292 		spin_unlock_bh(&ar->data_lock);
3293 
3294 		/* It is okay to release the lock and use txq because RCU read
3295 		 * lock is held.
3296 		 */
3297 
3298 		if (unlikely(!txq)) {
3299 			ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
3300 				    peer_id, tid);
3301 			continue;
3302 		}
3303 
3304 		spin_lock_bh(&ar->htt.tx_lock);
3305 		artxq = (void *)txq->drv_priv;
3306 		artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
3307 		spin_unlock_bh(&ar->htt.tx_lock);
3308 	}
3309 
3310 	rcu_read_unlock();
3311 
3312 	ath10k_mac_tx_push_pending(ar);
3313 }
3314 
3315 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3316 {
3317 	bool release;
3318 
3319 	release = ath10k_htt_t2h_msg_handler(ar, skb);
3320 
3321 	/* Free the indication buffer */
3322 	if (release)
3323 		dev_kfree_skb_any(skb);
3324 }
3325 
3326 static inline s8 ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate)
3327 {
3328 	static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12,
3329 					  18, 24, 36, 48, 54};
3330 	int i;
3331 
3332 	for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) {
3333 		if (rate == legacy_rates[i])
3334 			return i;
3335 	}
3336 
3337 	ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", rate);
3338 	return -EINVAL;
3339 }
3340 
3341 static void
3342 ath10k_accumulate_per_peer_tx_stats(struct ath10k *ar,
3343 				    struct ath10k_sta *arsta,
3344 				    struct ath10k_per_peer_tx_stats *pstats,
3345 				    s8 legacy_rate_idx)
3346 {
3347 	struct rate_info *txrate = &arsta->txrate;
3348 	struct ath10k_htt_tx_stats *tx_stats;
3349 	int idx, ht_idx, gi, mcs, bw, nss;
3350 	unsigned long flags;
3351 
3352 	if (!arsta->tx_stats)
3353 		return;
3354 
3355 	tx_stats = arsta->tx_stats;
3356 	flags = txrate->flags;
3357 	gi = test_bit(ATH10K_RATE_INFO_FLAGS_SGI_BIT, &flags);
3358 	mcs = ATH10K_HW_MCS_RATE(pstats->ratecode);
3359 	bw = txrate->bw;
3360 	nss = txrate->nss;
3361 	ht_idx = mcs + (nss - 1) * 8;
3362 	idx = mcs * 8 + 8 * 10 * (nss - 1);
3363 	idx += bw * 2 + gi;
3364 
3365 #define STATS_OP_FMT(name) tx_stats->stats[ATH10K_STATS_TYPE_##name]
3366 
3367 	if (txrate->flags & RATE_INFO_FLAGS_VHT_MCS) {
3368 		STATS_OP_FMT(SUCC).vht[0][mcs] += pstats->succ_bytes;
3369 		STATS_OP_FMT(SUCC).vht[1][mcs] += pstats->succ_pkts;
3370 		STATS_OP_FMT(FAIL).vht[0][mcs] += pstats->failed_bytes;
3371 		STATS_OP_FMT(FAIL).vht[1][mcs] += pstats->failed_pkts;
3372 		STATS_OP_FMT(RETRY).vht[0][mcs] += pstats->retry_bytes;
3373 		STATS_OP_FMT(RETRY).vht[1][mcs] += pstats->retry_pkts;
3374 	} else if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3375 		STATS_OP_FMT(SUCC).ht[0][ht_idx] += pstats->succ_bytes;
3376 		STATS_OP_FMT(SUCC).ht[1][ht_idx] += pstats->succ_pkts;
3377 		STATS_OP_FMT(FAIL).ht[0][ht_idx] += pstats->failed_bytes;
3378 		STATS_OP_FMT(FAIL).ht[1][ht_idx] += pstats->failed_pkts;
3379 		STATS_OP_FMT(RETRY).ht[0][ht_idx] += pstats->retry_bytes;
3380 		STATS_OP_FMT(RETRY).ht[1][ht_idx] += pstats->retry_pkts;
3381 	} else {
3382 		mcs = legacy_rate_idx;
3383 
3384 		STATS_OP_FMT(SUCC).legacy[0][mcs] += pstats->succ_bytes;
3385 		STATS_OP_FMT(SUCC).legacy[1][mcs] += pstats->succ_pkts;
3386 		STATS_OP_FMT(FAIL).legacy[0][mcs] += pstats->failed_bytes;
3387 		STATS_OP_FMT(FAIL).legacy[1][mcs] += pstats->failed_pkts;
3388 		STATS_OP_FMT(RETRY).legacy[0][mcs] += pstats->retry_bytes;
3389 		STATS_OP_FMT(RETRY).legacy[1][mcs] += pstats->retry_pkts;
3390 	}
3391 
3392 	if (ATH10K_HW_AMPDU(pstats->flags)) {
3393 		tx_stats->ba_fails += ATH10K_HW_BA_FAIL(pstats->flags);
3394 
3395 		if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3396 			STATS_OP_FMT(AMPDU).ht[0][ht_idx] +=
3397 				pstats->succ_bytes + pstats->retry_bytes;
3398 			STATS_OP_FMT(AMPDU).ht[1][ht_idx] +=
3399 				pstats->succ_pkts + pstats->retry_pkts;
3400 		} else {
3401 			STATS_OP_FMT(AMPDU).vht[0][mcs] +=
3402 				pstats->succ_bytes + pstats->retry_bytes;
3403 			STATS_OP_FMT(AMPDU).vht[1][mcs] +=
3404 				pstats->succ_pkts + pstats->retry_pkts;
3405 		}
3406 		STATS_OP_FMT(AMPDU).bw[0][bw] +=
3407 			pstats->succ_bytes + pstats->retry_bytes;
3408 		STATS_OP_FMT(AMPDU).nss[0][nss - 1] +=
3409 			pstats->succ_bytes + pstats->retry_bytes;
3410 		STATS_OP_FMT(AMPDU).gi[0][gi] +=
3411 			pstats->succ_bytes + pstats->retry_bytes;
3412 		STATS_OP_FMT(AMPDU).rate_table[0][idx] +=
3413 			pstats->succ_bytes + pstats->retry_bytes;
3414 		STATS_OP_FMT(AMPDU).bw[1][bw] +=
3415 			pstats->succ_pkts + pstats->retry_pkts;
3416 		STATS_OP_FMT(AMPDU).nss[1][nss - 1] +=
3417 			pstats->succ_pkts + pstats->retry_pkts;
3418 		STATS_OP_FMT(AMPDU).gi[1][gi] +=
3419 			pstats->succ_pkts + pstats->retry_pkts;
3420 		STATS_OP_FMT(AMPDU).rate_table[1][idx] +=
3421 			pstats->succ_pkts + pstats->retry_pkts;
3422 	} else {
3423 		tx_stats->ack_fails +=
3424 				ATH10K_HW_BA_FAIL(pstats->flags);
3425 	}
3426 
3427 	STATS_OP_FMT(SUCC).bw[0][bw] += pstats->succ_bytes;
3428 	STATS_OP_FMT(SUCC).nss[0][nss - 1] += pstats->succ_bytes;
3429 	STATS_OP_FMT(SUCC).gi[0][gi] += pstats->succ_bytes;
3430 
3431 	STATS_OP_FMT(SUCC).bw[1][bw] += pstats->succ_pkts;
3432 	STATS_OP_FMT(SUCC).nss[1][nss - 1] += pstats->succ_pkts;
3433 	STATS_OP_FMT(SUCC).gi[1][gi] += pstats->succ_pkts;
3434 
3435 	STATS_OP_FMT(FAIL).bw[0][bw] += pstats->failed_bytes;
3436 	STATS_OP_FMT(FAIL).nss[0][nss - 1] += pstats->failed_bytes;
3437 	STATS_OP_FMT(FAIL).gi[0][gi] += pstats->failed_bytes;
3438 
3439 	STATS_OP_FMT(FAIL).bw[1][bw] += pstats->failed_pkts;
3440 	STATS_OP_FMT(FAIL).nss[1][nss - 1] += pstats->failed_pkts;
3441 	STATS_OP_FMT(FAIL).gi[1][gi] += pstats->failed_pkts;
3442 
3443 	STATS_OP_FMT(RETRY).bw[0][bw] += pstats->retry_bytes;
3444 	STATS_OP_FMT(RETRY).nss[0][nss - 1] += pstats->retry_bytes;
3445 	STATS_OP_FMT(RETRY).gi[0][gi] += pstats->retry_bytes;
3446 
3447 	STATS_OP_FMT(RETRY).bw[1][bw] += pstats->retry_pkts;
3448 	STATS_OP_FMT(RETRY).nss[1][nss - 1] += pstats->retry_pkts;
3449 	STATS_OP_FMT(RETRY).gi[1][gi] += pstats->retry_pkts;
3450 
3451 	if (txrate->flags >= RATE_INFO_FLAGS_MCS) {
3452 		STATS_OP_FMT(SUCC).rate_table[0][idx] += pstats->succ_bytes;
3453 		STATS_OP_FMT(SUCC).rate_table[1][idx] += pstats->succ_pkts;
3454 		STATS_OP_FMT(FAIL).rate_table[0][idx] += pstats->failed_bytes;
3455 		STATS_OP_FMT(FAIL).rate_table[1][idx] += pstats->failed_pkts;
3456 		STATS_OP_FMT(RETRY).rate_table[0][idx] += pstats->retry_bytes;
3457 		STATS_OP_FMT(RETRY).rate_table[1][idx] += pstats->retry_pkts;
3458 	}
3459 
3460 	tx_stats->tx_duration += pstats->duration;
3461 }
3462 
3463 static void
3464 ath10k_update_per_peer_tx_stats(struct ath10k *ar,
3465 				struct ieee80211_sta *sta,
3466 				struct ath10k_per_peer_tx_stats *peer_stats)
3467 {
3468 	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
3469 	struct ieee80211_chanctx_conf *conf = NULL;
3470 	u8 rate = 0, sgi;
3471 	s8 rate_idx = 0;
3472 	bool skip_auto_rate;
3473 	struct rate_info txrate;
3474 
3475 	lockdep_assert_held(&ar->data_lock);
3476 
3477 	txrate.flags = ATH10K_HW_PREAMBLE(peer_stats->ratecode);
3478 	txrate.bw = ATH10K_HW_BW(peer_stats->flags);
3479 	txrate.nss = ATH10K_HW_NSS(peer_stats->ratecode);
3480 	txrate.mcs = ATH10K_HW_MCS_RATE(peer_stats->ratecode);
3481 	sgi = ATH10K_HW_GI(peer_stats->flags);
3482 	skip_auto_rate = ATH10K_FW_SKIPPED_RATE_CTRL(peer_stats->flags);
3483 
3484 	/* Firmware's rate control skips broadcast/management frames,
3485 	 * if host has configure fixed rates and in some other special cases.
3486 	 */
3487 	if (skip_auto_rate)
3488 		return;
3489 
3490 	if (txrate.flags == WMI_RATE_PREAMBLE_VHT && txrate.mcs > 9) {
3491 		ath10k_warn(ar, "Invalid VHT mcs %hhd peer stats",  txrate.mcs);
3492 		return;
3493 	}
3494 
3495 	if (txrate.flags == WMI_RATE_PREAMBLE_HT &&
3496 	    (txrate.mcs > 7 || txrate.nss < 1)) {
3497 		ath10k_warn(ar, "Invalid HT mcs %hhd nss %hhd peer stats",
3498 			    txrate.mcs, txrate.nss);
3499 		return;
3500 	}
3501 
3502 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
3503 	memset(&arsta->tx_info.status, 0, sizeof(arsta->tx_info.status));
3504 	if (txrate.flags == WMI_RATE_PREAMBLE_CCK ||
3505 	    txrate.flags == WMI_RATE_PREAMBLE_OFDM) {
3506 		rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode);
3507 		/* This is hacky, FW sends CCK rate 5.5Mbps as 6 */
3508 		if (rate == 6 && txrate.flags == WMI_RATE_PREAMBLE_CCK)
3509 			rate = 5;
3510 		rate_idx = ath10k_get_legacy_rate_idx(ar, rate);
3511 		if (rate_idx < 0)
3512 			return;
3513 		arsta->txrate.legacy = rate;
3514 	} else if (txrate.flags == WMI_RATE_PREAMBLE_HT) {
3515 		arsta->txrate.flags = RATE_INFO_FLAGS_MCS;
3516 		arsta->txrate.mcs = txrate.mcs + 8 * (txrate.nss - 1);
3517 	} else {
3518 		arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS;
3519 		arsta->txrate.mcs = txrate.mcs;
3520 	}
3521 
3522 	switch (txrate.flags) {
3523 	case WMI_RATE_PREAMBLE_OFDM:
3524 		if (arsta->arvif && arsta->arvif->vif)
3525 			conf = rcu_dereference(arsta->arvif->vif->chanctx_conf);
3526 		if (conf && conf->def.chan->band == NL80211_BAND_5GHZ)
3527 			arsta->tx_info.status.rates[0].idx = rate_idx - 4;
3528 		break;
3529 	case WMI_RATE_PREAMBLE_CCK:
3530 		arsta->tx_info.status.rates[0].idx = rate_idx;
3531 		if (sgi)
3532 			arsta->tx_info.status.rates[0].flags |=
3533 				(IEEE80211_TX_RC_USE_SHORT_PREAMBLE |
3534 				 IEEE80211_TX_RC_SHORT_GI);
3535 		break;
3536 	case WMI_RATE_PREAMBLE_HT:
3537 		arsta->tx_info.status.rates[0].idx =
3538 				txrate.mcs + ((txrate.nss - 1) * 8);
3539 		if (sgi)
3540 			arsta->tx_info.status.rates[0].flags |=
3541 					IEEE80211_TX_RC_SHORT_GI;
3542 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_MCS;
3543 		break;
3544 	case WMI_RATE_PREAMBLE_VHT:
3545 		ieee80211_rate_set_vht(&arsta->tx_info.status.rates[0],
3546 				       txrate.mcs, txrate.nss);
3547 		if (sgi)
3548 			arsta->tx_info.status.rates[0].flags |=
3549 						IEEE80211_TX_RC_SHORT_GI;
3550 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_VHT_MCS;
3551 		break;
3552 	}
3553 
3554 	arsta->txrate.nss = txrate.nss;
3555 	arsta->txrate.bw = ath10k_bw_to_mac80211_bw(txrate.bw);
3556 	arsta->last_tx_bitrate = cfg80211_calculate_bitrate(&arsta->txrate);
3557 	if (sgi)
3558 		arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
3559 
3560 	switch (arsta->txrate.bw) {
3561 	case RATE_INFO_BW_40:
3562 		arsta->tx_info.status.rates[0].flags |=
3563 				IEEE80211_TX_RC_40_MHZ_WIDTH;
3564 		break;
3565 	case RATE_INFO_BW_80:
3566 		arsta->tx_info.status.rates[0].flags |=
3567 				IEEE80211_TX_RC_80_MHZ_WIDTH;
3568 		break;
3569 	}
3570 
3571 	if (peer_stats->succ_pkts) {
3572 		arsta->tx_info.flags = IEEE80211_TX_STAT_ACK;
3573 		arsta->tx_info.status.rates[0].count = 1;
3574 		ieee80211_tx_rate_update(ar->hw, sta, &arsta->tx_info);
3575 	}
3576 
3577 	if (ar->htt.disable_tx_comp) {
3578 		arsta->tx_retries += peer_stats->retry_pkts;
3579 		arsta->tx_failed += peer_stats->failed_pkts;
3580 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx retries %d tx failed %d\n",
3581 			   arsta->tx_retries, arsta->tx_failed);
3582 	}
3583 
3584 	if (ath10k_debug_is_extd_tx_stats_enabled(ar))
3585 		ath10k_accumulate_per_peer_tx_stats(ar, arsta, peer_stats,
3586 						    rate_idx);
3587 }
3588 
3589 static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
3590 					struct sk_buff *skb)
3591 {
3592 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3593 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3594 	struct htt_per_peer_tx_stats_ind *tx_stats;
3595 	struct ieee80211_sta *sta;
3596 	struct ath10k_peer *peer;
3597 	int peer_id, i;
3598 	u8 ppdu_len, num_ppdu;
3599 
3600 	num_ppdu = resp->peer_tx_stats.num_ppdu;
3601 	ppdu_len = resp->peer_tx_stats.ppdu_len * sizeof(__le32);
3602 
3603 	if (skb->len < sizeof(struct htt_resp_hdr) + num_ppdu * ppdu_len) {
3604 		ath10k_warn(ar, "Invalid peer stats buf length %d\n", skb->len);
3605 		return;
3606 	}
3607 
3608 	tx_stats = (struct htt_per_peer_tx_stats_ind *)
3609 			(resp->peer_tx_stats.payload);
3610 	peer_id = __le16_to_cpu(tx_stats->peer_id);
3611 
3612 	rcu_read_lock();
3613 	spin_lock_bh(&ar->data_lock);
3614 	peer = ath10k_peer_find_by_id(ar, peer_id);
3615 	if (!peer || !peer->sta) {
3616 		ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n",
3617 			    peer_id);
3618 		goto out;
3619 	}
3620 
3621 	sta = peer->sta;
3622 	for (i = 0; i < num_ppdu; i++) {
3623 		tx_stats = (struct htt_per_peer_tx_stats_ind *)
3624 			   (resp->peer_tx_stats.payload + i * ppdu_len);
3625 
3626 		p_tx_stats->succ_bytes = __le32_to_cpu(tx_stats->succ_bytes);
3627 		p_tx_stats->retry_bytes = __le32_to_cpu(tx_stats->retry_bytes);
3628 		p_tx_stats->failed_bytes =
3629 				__le32_to_cpu(tx_stats->failed_bytes);
3630 		p_tx_stats->ratecode = tx_stats->ratecode;
3631 		p_tx_stats->flags = tx_stats->flags;
3632 		p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts);
3633 		p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts);
3634 		p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts);
3635 		p_tx_stats->duration = __le16_to_cpu(tx_stats->tx_duration);
3636 
3637 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3638 	}
3639 
3640 out:
3641 	spin_unlock_bh(&ar->data_lock);
3642 	rcu_read_unlock();
3643 }
3644 
3645 static void ath10k_fetch_10_2_tx_stats(struct ath10k *ar, u8 *data)
3646 {
3647 	struct ath10k_pktlog_hdr *hdr = (struct ath10k_pktlog_hdr *)data;
3648 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3649 	struct ath10k_10_2_peer_tx_stats *tx_stats;
3650 	struct ieee80211_sta *sta;
3651 	struct ath10k_peer *peer;
3652 	u16 log_type = __le16_to_cpu(hdr->log_type);
3653 	u32 peer_id = 0, i;
3654 
3655 	if (log_type != ATH_PKTLOG_TYPE_TX_STAT)
3656 		return;
3657 
3658 	tx_stats = (struct ath10k_10_2_peer_tx_stats *)((hdr->payload) +
3659 		    ATH10K_10_2_TX_STATS_OFFSET);
3660 
3661 	if (!tx_stats->tx_ppdu_cnt)
3662 		return;
3663 
3664 	peer_id = tx_stats->peer_id;
3665 
3666 	rcu_read_lock();
3667 	spin_lock_bh(&ar->data_lock);
3668 	peer = ath10k_peer_find_by_id(ar, peer_id);
3669 	if (!peer || !peer->sta) {
3670 		ath10k_warn(ar, "Invalid peer id %d in peer stats buffer\n",
3671 			    peer_id);
3672 		goto out;
3673 	}
3674 
3675 	sta = peer->sta;
3676 	for (i = 0; i < tx_stats->tx_ppdu_cnt; i++) {
3677 		p_tx_stats->succ_bytes =
3678 			__le16_to_cpu(tx_stats->success_bytes[i]);
3679 		p_tx_stats->retry_bytes =
3680 			__le16_to_cpu(tx_stats->retry_bytes[i]);
3681 		p_tx_stats->failed_bytes =
3682 			__le16_to_cpu(tx_stats->failed_bytes[i]);
3683 		p_tx_stats->ratecode = tx_stats->ratecode[i];
3684 		p_tx_stats->flags = tx_stats->flags[i];
3685 		p_tx_stats->succ_pkts = tx_stats->success_pkts[i];
3686 		p_tx_stats->retry_pkts = tx_stats->retry_pkts[i];
3687 		p_tx_stats->failed_pkts = tx_stats->failed_pkts[i];
3688 
3689 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3690 	}
3691 	spin_unlock_bh(&ar->data_lock);
3692 	rcu_read_unlock();
3693 
3694 	return;
3695 
3696 out:
3697 	spin_unlock_bh(&ar->data_lock);
3698 	rcu_read_unlock();
3699 }
3700 
3701 static int ath10k_htt_rx_pn_len(enum htt_security_types sec_type)
3702 {
3703 	switch (sec_type) {
3704 	case HTT_SECURITY_TKIP:
3705 	case HTT_SECURITY_TKIP_NOMIC:
3706 	case HTT_SECURITY_AES_CCMP:
3707 		return 48;
3708 	default:
3709 		return 0;
3710 	}
3711 }
3712 
3713 static void ath10k_htt_rx_sec_ind_handler(struct ath10k *ar,
3714 					  struct htt_security_indication *ev)
3715 {
3716 	enum htt_txrx_sec_cast_type sec_index;
3717 	enum htt_security_types sec_type;
3718 	struct ath10k_peer *peer;
3719 
3720 	spin_lock_bh(&ar->data_lock);
3721 
3722 	peer = ath10k_peer_find_by_id(ar, __le16_to_cpu(ev->peer_id));
3723 	if (!peer) {
3724 		ath10k_warn(ar, "failed to find peer id %d for security indication",
3725 			    __le16_to_cpu(ev->peer_id));
3726 		goto out;
3727 	}
3728 
3729 	sec_type = MS(ev->flags, HTT_SECURITY_TYPE);
3730 
3731 	if (ev->flags & HTT_SECURITY_IS_UNICAST)
3732 		sec_index = HTT_TXRX_SEC_UCAST;
3733 	else
3734 		sec_index = HTT_TXRX_SEC_MCAST;
3735 
3736 	peer->rx_pn[sec_index].sec_type = sec_type;
3737 	peer->rx_pn[sec_index].pn_len = ath10k_htt_rx_pn_len(sec_type);
3738 
3739 	memset(peer->tids_last_pn_valid, 0, sizeof(peer->tids_last_pn_valid));
3740 	memset(peer->tids_last_pn, 0, sizeof(peer->tids_last_pn));
3741 
3742 out:
3743 	spin_unlock_bh(&ar->data_lock);
3744 }
3745 
3746 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3747 {
3748 	struct ath10k_htt *htt = &ar->htt;
3749 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3750 	enum htt_t2h_msg_type type;
3751 
3752 	/* confirm alignment */
3753 	if (!IS_ALIGNED((unsigned long)skb->data, 4))
3754 		ath10k_warn(ar, "unaligned htt message, expect trouble\n");
3755 
3756 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
3757 		   resp->hdr.msg_type);
3758 
3759 	if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
3760 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
3761 			   resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
3762 		return true;
3763 	}
3764 	type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
3765 
3766 	switch (type) {
3767 	case HTT_T2H_MSG_TYPE_VERSION_CONF: {
3768 		htt->target_version_major = resp->ver_resp.major;
3769 		htt->target_version_minor = resp->ver_resp.minor;
3770 		complete(&htt->target_version_received);
3771 		break;
3772 	}
3773 	case HTT_T2H_MSG_TYPE_RX_IND:
3774 		if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
3775 			ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind);
3776 		} else {
3777 			skb_queue_tail(&htt->rx_indication_head, skb);
3778 			return false;
3779 		}
3780 		break;
3781 	case HTT_T2H_MSG_TYPE_PEER_MAP: {
3782 		struct htt_peer_map_event ev = {
3783 			.vdev_id = resp->peer_map.vdev_id,
3784 			.peer_id = __le16_to_cpu(resp->peer_map.peer_id),
3785 		};
3786 		memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
3787 		ath10k_peer_map_event(htt, &ev);
3788 		break;
3789 	}
3790 	case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
3791 		struct htt_peer_unmap_event ev = {
3792 			.peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
3793 		};
3794 		ath10k_peer_unmap_event(htt, &ev);
3795 		break;
3796 	}
3797 	case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
3798 		struct htt_tx_done tx_done = {};
3799 		struct ath10k_htt *htt = &ar->htt;
3800 		struct ath10k_htc *htc = &ar->htc;
3801 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
3802 		int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
3803 		int info = __le32_to_cpu(resp->mgmt_tx_completion.info);
3804 
3805 		tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
3806 
3807 		switch (status) {
3808 		case HTT_MGMT_TX_STATUS_OK:
3809 			tx_done.status = HTT_TX_COMPL_STATE_ACK;
3810 			if (test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS,
3811 				     ar->wmi.svc_map) &&
3812 			    (resp->mgmt_tx_completion.flags &
3813 			     HTT_MGMT_TX_CMPL_FLAG_ACK_RSSI)) {
3814 				tx_done.ack_rssi =
3815 				FIELD_GET(HTT_MGMT_TX_CMPL_INFO_ACK_RSSI_MASK,
3816 					  info);
3817 			}
3818 			break;
3819 		case HTT_MGMT_TX_STATUS_RETRY:
3820 			tx_done.status = HTT_TX_COMPL_STATE_NOACK;
3821 			break;
3822 		case HTT_MGMT_TX_STATUS_DROP:
3823 			tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
3824 			break;
3825 		}
3826 
3827 		if (htt->disable_tx_comp) {
3828 			spin_lock_bh(&htc->tx_lock);
3829 			ep->tx_credits++;
3830 			spin_unlock_bh(&htc->tx_lock);
3831 		}
3832 
3833 		status = ath10k_txrx_tx_unref(htt, &tx_done);
3834 		if (!status) {
3835 			spin_lock_bh(&htt->tx_lock);
3836 			ath10k_htt_tx_mgmt_dec_pending(htt);
3837 			spin_unlock_bh(&htt->tx_lock);
3838 		}
3839 		break;
3840 	}
3841 	case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
3842 		ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
3843 		break;
3844 	case HTT_T2H_MSG_TYPE_SEC_IND: {
3845 		struct ath10k *ar = htt->ar;
3846 		struct htt_security_indication *ev = &resp->security_indication;
3847 
3848 		ath10k_htt_rx_sec_ind_handler(ar, ev);
3849 		ath10k_dbg(ar, ATH10K_DBG_HTT,
3850 			   "sec ind peer_id %d unicast %d type %d\n",
3851 			  __le16_to_cpu(ev->peer_id),
3852 			  !!(ev->flags & HTT_SECURITY_IS_UNICAST),
3853 			  MS(ev->flags, HTT_SECURITY_TYPE));
3854 		complete(&ar->install_key_done);
3855 		break;
3856 	}
3857 	case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
3858 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
3859 				skb->data, skb->len);
3860 		atomic_inc(&htt->num_mpdus_ready);
3861 
3862 		return ath10k_htt_rx_proc_rx_frag_ind(htt,
3863 						      &resp->rx_frag_ind,
3864 						      skb);
3865 		break;
3866 	}
3867 	case HTT_T2H_MSG_TYPE_TEST:
3868 		break;
3869 	case HTT_T2H_MSG_TYPE_STATS_CONF:
3870 		trace_ath10k_htt_stats(ar, skb->data, skb->len);
3871 		break;
3872 	case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
3873 		/* Firmware can return tx frames if it's unable to fully
3874 		 * process them and suspects host may be able to fix it. ath10k
3875 		 * sends all tx frames as already inspected so this shouldn't
3876 		 * happen unless fw has a bug.
3877 		 */
3878 		ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
3879 		break;
3880 	case HTT_T2H_MSG_TYPE_RX_ADDBA:
3881 		ath10k_htt_rx_addba(ar, resp);
3882 		break;
3883 	case HTT_T2H_MSG_TYPE_RX_DELBA:
3884 		ath10k_htt_rx_delba(ar, resp);
3885 		break;
3886 	case HTT_T2H_MSG_TYPE_PKTLOG: {
3887 		trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
3888 					skb->len -
3889 					offsetof(struct htt_resp,
3890 						 pktlog_msg.payload));
3891 
3892 		if (ath10k_peer_stats_enabled(ar))
3893 			ath10k_fetch_10_2_tx_stats(ar,
3894 						   resp->pktlog_msg.payload);
3895 		break;
3896 	}
3897 	case HTT_T2H_MSG_TYPE_RX_FLUSH: {
3898 		/* Ignore this event because mac80211 takes care of Rx
3899 		 * aggregation reordering.
3900 		 */
3901 		break;
3902 	}
3903 	case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
3904 		skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
3905 		return false;
3906 	}
3907 	case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND: {
3908 		struct ath10k_htt *htt = &ar->htt;
3909 		struct ath10k_htc *htc = &ar->htc;
3910 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
3911 		u32 msg_word = __le32_to_cpu(*(__le32 *)resp);
3912 		int htt_credit_delta;
3913 
3914 		htt_credit_delta = HTT_TX_CREDIT_DELTA_ABS_GET(msg_word);
3915 		if (HTT_TX_CREDIT_SIGN_BIT_GET(msg_word))
3916 			htt_credit_delta = -htt_credit_delta;
3917 
3918 		ath10k_dbg(ar, ATH10K_DBG_HTT,
3919 			   "htt credit update delta %d\n",
3920 			   htt_credit_delta);
3921 
3922 		if (htt->disable_tx_comp) {
3923 			spin_lock_bh(&htc->tx_lock);
3924 			ep->tx_credits += htt_credit_delta;
3925 			spin_unlock_bh(&htc->tx_lock);
3926 			ath10k_dbg(ar, ATH10K_DBG_HTT,
3927 				   "htt credit total %d\n",
3928 				   ep->tx_credits);
3929 			ep->ep_ops.ep_tx_credits(htc->ar);
3930 		}
3931 		break;
3932 	}
3933 	case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
3934 		u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
3935 		u32 freq = __le32_to_cpu(resp->chan_change.freq);
3936 
3937 		ar->tgt_oper_chan = ieee80211_get_channel(ar->hw->wiphy, freq);
3938 		ath10k_dbg(ar, ATH10K_DBG_HTT,
3939 			   "htt chan change freq %u phymode %s\n",
3940 			   freq, ath10k_wmi_phymode_str(phymode));
3941 		break;
3942 	}
3943 	case HTT_T2H_MSG_TYPE_AGGR_CONF:
3944 		break;
3945 	case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
3946 		struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
3947 
3948 		if (!tx_fetch_ind) {
3949 			ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
3950 			break;
3951 		}
3952 		skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
3953 		break;
3954 	}
3955 	case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
3956 		ath10k_htt_rx_tx_fetch_confirm(ar, skb);
3957 		break;
3958 	case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
3959 		ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
3960 		break;
3961 	case HTT_T2H_MSG_TYPE_PEER_STATS:
3962 		ath10k_htt_fetch_peer_stats(ar, skb);
3963 		break;
3964 	case HTT_T2H_MSG_TYPE_EN_STATS:
3965 	default:
3966 		ath10k_warn(ar, "htt event (%d) not handled\n",
3967 			    resp->hdr.msg_type);
3968 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
3969 				skb->data, skb->len);
3970 		break;
3971 	}
3972 	return true;
3973 }
3974 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
3975 
3976 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
3977 					     struct sk_buff *skb)
3978 {
3979 	trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
3980 	dev_kfree_skb_any(skb);
3981 }
3982 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
3983 
3984 static int ath10k_htt_rx_deliver_msdu(struct ath10k *ar, int quota, int budget)
3985 {
3986 	struct sk_buff *skb;
3987 
3988 	while (quota < budget) {
3989 		if (skb_queue_empty(&ar->htt.rx_msdus_q))
3990 			break;
3991 
3992 		skb = skb_dequeue(&ar->htt.rx_msdus_q);
3993 		if (!skb)
3994 			break;
3995 		ath10k_process_rx(ar, skb);
3996 		quota++;
3997 	}
3998 
3999 	return quota;
4000 }
4001 
4002 int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget)
4003 {
4004 	struct htt_resp *resp;
4005 	struct ath10k_htt *htt = &ar->htt;
4006 	struct sk_buff *skb;
4007 	bool release;
4008 	int quota;
4009 
4010 	for (quota = 0; quota < budget; quota++) {
4011 		skb = skb_dequeue(&htt->rx_indication_head);
4012 		if (!skb)
4013 			break;
4014 
4015 		resp = (struct htt_resp *)skb->data;
4016 
4017 		release = ath10k_htt_rx_proc_rx_ind_hl(htt,
4018 						       &resp->rx_ind_hl,
4019 						       skb,
4020 						       HTT_RX_PN_CHECK,
4021 						       HTT_RX_NON_TKIP_MIC);
4022 
4023 		if (release)
4024 			dev_kfree_skb_any(skb);
4025 
4026 		ath10k_dbg(ar, ATH10K_DBG_HTT, "rx indication poll pending count:%d\n",
4027 			   skb_queue_len(&htt->rx_indication_head));
4028 	}
4029 	return quota;
4030 }
4031 EXPORT_SYMBOL(ath10k_htt_rx_hl_indication);
4032 
4033 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
4034 {
4035 	struct ath10k_htt *htt = &ar->htt;
4036 	struct htt_tx_done tx_done = {};
4037 	struct sk_buff_head tx_ind_q;
4038 	struct sk_buff *skb;
4039 	unsigned long flags;
4040 	int quota = 0, done, ret;
4041 	bool resched_napi = false;
4042 
4043 	__skb_queue_head_init(&tx_ind_q);
4044 
4045 	/* Process pending frames before dequeuing more data
4046 	 * from hardware.
4047 	 */
4048 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4049 	if (quota == budget) {
4050 		resched_napi = true;
4051 		goto exit;
4052 	}
4053 
4054 	while ((skb = skb_dequeue(&htt->rx_in_ord_compl_q))) {
4055 		spin_lock_bh(&htt->rx_ring.lock);
4056 		ret = ath10k_htt_rx_in_ord_ind(ar, skb);
4057 		spin_unlock_bh(&htt->rx_ring.lock);
4058 
4059 		dev_kfree_skb_any(skb);
4060 		if (ret == -EIO) {
4061 			resched_napi = true;
4062 			goto exit;
4063 		}
4064 	}
4065 
4066 	while (atomic_read(&htt->num_mpdus_ready)) {
4067 		ret = ath10k_htt_rx_handle_amsdu(htt);
4068 		if (ret == -EIO) {
4069 			resched_napi = true;
4070 			goto exit;
4071 		}
4072 		atomic_dec(&htt->num_mpdus_ready);
4073 	}
4074 
4075 	/* Deliver received data after processing data from hardware */
4076 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4077 
4078 	/* From NAPI documentation:
4079 	 *  The napi poll() function may also process TX completions, in which
4080 	 *  case if it processes the entire TX ring then it should count that
4081 	 *  work as the rest of the budget.
4082 	 */
4083 	if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo))
4084 		quota = budget;
4085 
4086 	/* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
4087 	 * From kfifo_get() documentation:
4088 	 *  Note that with only one concurrent reader and one concurrent writer,
4089 	 *  you don't need extra locking to use these macro.
4090 	 */
4091 	while (kfifo_get(&htt->txdone_fifo, &tx_done))
4092 		ath10k_txrx_tx_unref(htt, &tx_done);
4093 
4094 	ath10k_mac_tx_push_pending(ar);
4095 
4096 	spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
4097 	skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
4098 	spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
4099 
4100 	while ((skb = __skb_dequeue(&tx_ind_q))) {
4101 		ath10k_htt_rx_tx_fetch_ind(ar, skb);
4102 		dev_kfree_skb_any(skb);
4103 	}
4104 
4105 exit:
4106 	ath10k_htt_rx_msdu_buff_replenish(htt);
4107 	/* In case of rx failure or more data to read, report budget
4108 	 * to reschedule NAPI poll
4109 	 */
4110 	done = resched_napi ? budget : quota;
4111 
4112 	return done;
4113 }
4114 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);
4115 
4116 static const struct ath10k_htt_rx_ops htt_rx_ops_32 = {
4117 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_32,
4118 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_32,
4119 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_32,
4120 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_32,
4121 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_32,
4122 };
4123 
4124 static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
4125 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_64,
4126 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_64,
4127 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_64,
4128 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_64,
4129 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
4130 };
4131 
4132 static const struct ath10k_htt_rx_ops htt_rx_ops_hl = {
4133 	.htt_rx_proc_rx_frag_ind = ath10k_htt_rx_proc_rx_frag_ind_hl,
4134 };
4135 
4136 void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
4137 {
4138 	struct ath10k *ar = htt->ar;
4139 
4140 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
4141 		htt->rx_ops = &htt_rx_ops_hl;
4142 	else if (ar->hw_params.target_64bit)
4143 		htt->rx_ops = &htt_rx_ops_64;
4144 	else
4145 		htt->rx_ops = &htt_rx_ops_32;
4146 }
4147