xref: /linux/drivers/net/wireless/ath/ath10k/htt_rx.c (revision 06d07429858317ded2db7986113a9e0129cd599b)
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  * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
7  */
8 
9 #include "core.h"
10 #include "htc.h"
11 #include "htt.h"
12 #include "txrx.h"
13 #include "debug.h"
14 #include "trace.h"
15 #include "mac.h"
16 
17 #include <linux/log2.h>
18 #include <linux/bitfield.h>
19 
20 /* when under memory pressure rx ring refill may fail and needs a retry */
21 #define HTT_RX_RING_REFILL_RETRY_MS 50
22 
23 #define HTT_RX_RING_REFILL_RESCHED_MS 5
24 
25 /* shortcut to interpret a raw memory buffer as a rx descriptor */
26 #define HTT_RX_BUF_TO_RX_DESC(hw, buf) ath10k_htt_rx_desc_from_raw_buffer(hw, buf)
27 
28 static int ath10k_htt_rx_get_csum_state(struct ath10k_hw_params *hw, struct sk_buff *skb);
29 
30 static struct sk_buff *
ath10k_htt_rx_find_skb_paddr(struct ath10k * ar,u64 paddr)31 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u64 paddr)
32 {
33 	struct ath10k_skb_rxcb *rxcb;
34 
35 	hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
36 		if (rxcb->paddr == paddr)
37 			return ATH10K_RXCB_SKB(rxcb);
38 
39 	WARN_ON_ONCE(1);
40 	return NULL;
41 }
42 
ath10k_htt_rx_ring_free(struct ath10k_htt * htt)43 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
44 {
45 	struct sk_buff *skb;
46 	struct ath10k_skb_rxcb *rxcb;
47 	struct hlist_node *n;
48 	int i;
49 
50 	if (htt->rx_ring.in_ord_rx) {
51 		hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
52 			skb = ATH10K_RXCB_SKB(rxcb);
53 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
54 					 skb->len + skb_tailroom(skb),
55 					 DMA_FROM_DEVICE);
56 			hash_del(&rxcb->hlist);
57 			dev_kfree_skb_any(skb);
58 		}
59 	} else {
60 		for (i = 0; i < htt->rx_ring.size; i++) {
61 			skb = htt->rx_ring.netbufs_ring[i];
62 			if (!skb)
63 				continue;
64 
65 			rxcb = ATH10K_SKB_RXCB(skb);
66 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
67 					 skb->len + skb_tailroom(skb),
68 					 DMA_FROM_DEVICE);
69 			dev_kfree_skb_any(skb);
70 		}
71 	}
72 
73 	htt->rx_ring.fill_cnt = 0;
74 	hash_init(htt->rx_ring.skb_table);
75 	memset(htt->rx_ring.netbufs_ring, 0,
76 	       htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
77 }
78 
ath10k_htt_get_rx_ring_size_32(struct ath10k_htt * htt)79 static size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
80 {
81 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
82 }
83 
ath10k_htt_get_rx_ring_size_64(struct ath10k_htt * htt)84 static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
85 {
86 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
87 }
88 
ath10k_htt_config_paddrs_ring_32(struct ath10k_htt * htt,void * vaddr)89 static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
90 					     void *vaddr)
91 {
92 	htt->rx_ring.paddrs_ring_32 = vaddr;
93 }
94 
ath10k_htt_config_paddrs_ring_64(struct ath10k_htt * htt,void * vaddr)95 static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
96 					     void *vaddr)
97 {
98 	htt->rx_ring.paddrs_ring_64 = vaddr;
99 }
100 
ath10k_htt_set_paddrs_ring_32(struct ath10k_htt * htt,dma_addr_t paddr,int idx)101 static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
102 					  dma_addr_t paddr, int idx)
103 {
104 	htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
105 }
106 
ath10k_htt_set_paddrs_ring_64(struct ath10k_htt * htt,dma_addr_t paddr,int idx)107 static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
108 					  dma_addr_t paddr, int idx)
109 {
110 	htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
111 }
112 
ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt * htt,int idx)113 static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
114 {
115 	htt->rx_ring.paddrs_ring_32[idx] = 0;
116 }
117 
ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt * htt,int idx)118 static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
119 {
120 	htt->rx_ring.paddrs_ring_64[idx] = 0;
121 }
122 
ath10k_htt_get_vaddr_ring_32(struct ath10k_htt * htt)123 static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
124 {
125 	return (void *)htt->rx_ring.paddrs_ring_32;
126 }
127 
ath10k_htt_get_vaddr_ring_64(struct ath10k_htt * htt)128 static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
129 {
130 	return (void *)htt->rx_ring.paddrs_ring_64;
131 }
132 
__ath10k_htt_rx_ring_fill_n(struct ath10k_htt * htt,int num)133 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
134 {
135 	struct ath10k_hw_params *hw = &htt->ar->hw_params;
136 	struct htt_rx_desc *rx_desc;
137 	struct ath10k_skb_rxcb *rxcb;
138 	struct sk_buff *skb;
139 	dma_addr_t paddr;
140 	int ret = 0, idx;
141 
142 	/* The Full Rx Reorder firmware has no way of telling the host
143 	 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
144 	 * To keep things simple make sure ring is always half empty. This
145 	 * guarantees there'll be no replenishment overruns possible.
146 	 */
147 	BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
148 
149 	idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
150 
151 	if (idx < 0 || idx >= htt->rx_ring.size) {
152 		ath10k_err(htt->ar, "rx ring index is not valid, firmware malfunctioning?\n");
153 		idx &= htt->rx_ring.size_mask;
154 		ret = -ENOMEM;
155 		goto fail;
156 	}
157 
158 	while (num > 0) {
159 		skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
160 		if (!skb) {
161 			ret = -ENOMEM;
162 			goto fail;
163 		}
164 
165 		if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
166 			skb_pull(skb,
167 				 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
168 				 skb->data);
169 
170 		/* Clear rx_desc attention word before posting to Rx ring */
171 		rx_desc = HTT_RX_BUF_TO_RX_DESC(hw, skb->data);
172 		ath10k_htt_rx_desc_get_attention(hw, rx_desc)->flags = __cpu_to_le32(0);
173 
174 		paddr = dma_map_single(htt->ar->dev, skb->data,
175 				       skb->len + skb_tailroom(skb),
176 				       DMA_FROM_DEVICE);
177 
178 		if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
179 			dev_kfree_skb_any(skb);
180 			ret = -ENOMEM;
181 			goto fail;
182 		}
183 
184 		rxcb = ATH10K_SKB_RXCB(skb);
185 		rxcb->paddr = paddr;
186 		htt->rx_ring.netbufs_ring[idx] = skb;
187 		ath10k_htt_set_paddrs_ring(htt, paddr, idx);
188 		htt->rx_ring.fill_cnt++;
189 
190 		if (htt->rx_ring.in_ord_rx) {
191 			hash_add(htt->rx_ring.skb_table,
192 				 &ATH10K_SKB_RXCB(skb)->hlist,
193 				 paddr);
194 		}
195 
196 		num--;
197 		idx++;
198 		idx &= htt->rx_ring.size_mask;
199 	}
200 
201 fail:
202 	/*
203 	 * Make sure the rx buffer is updated before available buffer
204 	 * index to avoid any potential rx ring corruption.
205 	 */
206 	mb();
207 	*htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
208 	return ret;
209 }
210 
ath10k_htt_rx_ring_fill_n(struct ath10k_htt * htt,int num)211 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
212 {
213 	lockdep_assert_held(&htt->rx_ring.lock);
214 	return __ath10k_htt_rx_ring_fill_n(htt, num);
215 }
216 
ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt * htt)217 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
218 {
219 	int ret, num_deficit, num_to_fill;
220 
221 	/* Refilling the whole RX ring buffer proves to be a bad idea. The
222 	 * reason is RX may take up significant amount of CPU cycles and starve
223 	 * other tasks, e.g. TX on an ethernet device while acting as a bridge
224 	 * with ath10k wlan interface. This ended up with very poor performance
225 	 * once CPU the host system was overwhelmed with RX on ath10k.
226 	 *
227 	 * By limiting the number of refills the replenishing occurs
228 	 * progressively. This in turns makes use of the fact tasklets are
229 	 * processed in FIFO order. This means actual RX processing can starve
230 	 * out refilling. If there's not enough buffers on RX ring FW will not
231 	 * report RX until it is refilled with enough buffers. This
232 	 * automatically balances load wrt to CPU power.
233 	 *
234 	 * This probably comes at a cost of lower maximum throughput but
235 	 * improves the average and stability.
236 	 */
237 	spin_lock_bh(&htt->rx_ring.lock);
238 	num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
239 	num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
240 	num_deficit -= num_to_fill;
241 	ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
242 	if (ret == -ENOMEM) {
243 		/*
244 		 * Failed to fill it to the desired level -
245 		 * we'll start a timer and try again next time.
246 		 * As long as enough buffers are left in the ring for
247 		 * another A-MPDU rx, no special recovery is needed.
248 		 */
249 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
250 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
251 	} else if (num_deficit > 0) {
252 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
253 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
254 	}
255 	spin_unlock_bh(&htt->rx_ring.lock);
256 }
257 
ath10k_htt_rx_ring_refill_retry(struct timer_list * t)258 static void ath10k_htt_rx_ring_refill_retry(struct timer_list *t)
259 {
260 	struct ath10k_htt *htt = from_timer(htt, t, rx_ring.refill_retry_timer);
261 
262 	ath10k_htt_rx_msdu_buff_replenish(htt);
263 }
264 
ath10k_htt_rx_ring_refill(struct ath10k * ar)265 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
266 {
267 	struct ath10k_htt *htt = &ar->htt;
268 	int ret;
269 
270 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
271 		return 0;
272 
273 	spin_lock_bh(&htt->rx_ring.lock);
274 	ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
275 					      htt->rx_ring.fill_cnt));
276 
277 	if (ret)
278 		ath10k_htt_rx_ring_free(htt);
279 
280 	spin_unlock_bh(&htt->rx_ring.lock);
281 
282 	return ret;
283 }
284 
ath10k_htt_rx_free(struct ath10k_htt * htt)285 void ath10k_htt_rx_free(struct ath10k_htt *htt)
286 {
287 	if (htt->ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
288 		return;
289 
290 	del_timer_sync(&htt->rx_ring.refill_retry_timer);
291 
292 	skb_queue_purge(&htt->rx_msdus_q);
293 	skb_queue_purge(&htt->rx_in_ord_compl_q);
294 	skb_queue_purge(&htt->tx_fetch_ind_q);
295 
296 	spin_lock_bh(&htt->rx_ring.lock);
297 	ath10k_htt_rx_ring_free(htt);
298 	spin_unlock_bh(&htt->rx_ring.lock);
299 
300 	dma_free_coherent(htt->ar->dev,
301 			  ath10k_htt_get_rx_ring_size(htt),
302 			  ath10k_htt_get_vaddr_ring(htt),
303 			  htt->rx_ring.base_paddr);
304 
305 	ath10k_htt_config_paddrs_ring(htt, NULL);
306 
307 	dma_free_coherent(htt->ar->dev,
308 			  sizeof(*htt->rx_ring.alloc_idx.vaddr),
309 			  htt->rx_ring.alloc_idx.vaddr,
310 			  htt->rx_ring.alloc_idx.paddr);
311 	htt->rx_ring.alloc_idx.vaddr = NULL;
312 
313 	kfree(htt->rx_ring.netbufs_ring);
314 	htt->rx_ring.netbufs_ring = NULL;
315 }
316 
ath10k_htt_rx_netbuf_pop(struct ath10k_htt * htt)317 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
318 {
319 	struct ath10k *ar = htt->ar;
320 	int idx;
321 	struct sk_buff *msdu;
322 
323 	lockdep_assert_held(&htt->rx_ring.lock);
324 
325 	if (htt->rx_ring.fill_cnt == 0) {
326 		ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
327 		return NULL;
328 	}
329 
330 	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
331 	msdu = htt->rx_ring.netbufs_ring[idx];
332 	htt->rx_ring.netbufs_ring[idx] = NULL;
333 	ath10k_htt_reset_paddrs_ring(htt, idx);
334 
335 	idx++;
336 	idx &= htt->rx_ring.size_mask;
337 	htt->rx_ring.sw_rd_idx.msdu_payld = idx;
338 	htt->rx_ring.fill_cnt--;
339 
340 	dma_unmap_single(htt->ar->dev,
341 			 ATH10K_SKB_RXCB(msdu)->paddr,
342 			 msdu->len + skb_tailroom(msdu),
343 			 DMA_FROM_DEVICE);
344 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
345 			msdu->data, msdu->len + skb_tailroom(msdu));
346 
347 	return msdu;
348 }
349 
350 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
ath10k_htt_rx_amsdu_pop(struct ath10k_htt * htt,struct sk_buff_head * amsdu)351 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
352 				   struct sk_buff_head *amsdu)
353 {
354 	struct ath10k *ar = htt->ar;
355 	struct ath10k_hw_params *hw = &ar->hw_params;
356 	int msdu_len, msdu_chaining = 0;
357 	struct sk_buff *msdu;
358 	struct htt_rx_desc *rx_desc;
359 	struct rx_attention *rx_desc_attention;
360 	struct rx_frag_info_common *rx_desc_frag_info_common;
361 	struct rx_msdu_start_common *rx_desc_msdu_start_common;
362 	struct rx_msdu_end_common *rx_desc_msdu_end_common;
363 
364 	lockdep_assert_held(&htt->rx_ring.lock);
365 
366 	for (;;) {
367 		int last_msdu, msdu_len_invalid, msdu_chained;
368 
369 		msdu = ath10k_htt_rx_netbuf_pop(htt);
370 		if (!msdu) {
371 			__skb_queue_purge(amsdu);
372 			return -ENOENT;
373 		}
374 
375 		__skb_queue_tail(amsdu, msdu);
376 
377 		rx_desc = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
378 		rx_desc_attention = ath10k_htt_rx_desc_get_attention(hw, rx_desc);
379 		rx_desc_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw,
380 									      rx_desc);
381 		rx_desc_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rx_desc);
382 		rx_desc_frag_info_common = ath10k_htt_rx_desc_get_frag_info(hw, rx_desc);
383 
384 		/* FIXME: we must report msdu payload since this is what caller
385 		 * expects now
386 		 */
387 		skb_put(msdu, hw->rx_desc_ops->rx_desc_msdu_payload_offset);
388 		skb_pull(msdu, hw->rx_desc_ops->rx_desc_msdu_payload_offset);
389 
390 		/*
391 		 * Sanity check - confirm the HW is finished filling in the
392 		 * rx data.
393 		 * If the HW and SW are working correctly, then it's guaranteed
394 		 * that the HW's MAC DMA is done before this point in the SW.
395 		 * To prevent the case that we handle a stale Rx descriptor,
396 		 * just assert for now until we have a way to recover.
397 		 */
398 		if (!(__le32_to_cpu(rx_desc_attention->flags)
399 				& RX_ATTENTION_FLAGS_MSDU_DONE)) {
400 			__skb_queue_purge(amsdu);
401 			return -EIO;
402 		}
403 
404 		msdu_len_invalid = !!(__le32_to_cpu(rx_desc_attention->flags)
405 					& (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
406 					   RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
407 		msdu_len = MS(__le32_to_cpu(rx_desc_msdu_start_common->info0),
408 			      RX_MSDU_START_INFO0_MSDU_LENGTH);
409 		msdu_chained = rx_desc_frag_info_common->ring2_more_count;
410 
411 		if (msdu_len_invalid)
412 			msdu_len = 0;
413 
414 		skb_trim(msdu, 0);
415 		skb_put(msdu, min(msdu_len, ath10k_htt_rx_msdu_size(hw)));
416 		msdu_len -= msdu->len;
417 
418 		/* Note: Chained buffers do not contain rx descriptor */
419 		while (msdu_chained--) {
420 			msdu = ath10k_htt_rx_netbuf_pop(htt);
421 			if (!msdu) {
422 				__skb_queue_purge(amsdu);
423 				return -ENOENT;
424 			}
425 
426 			__skb_queue_tail(amsdu, msdu);
427 			skb_trim(msdu, 0);
428 			skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
429 			msdu_len -= msdu->len;
430 			msdu_chaining = 1;
431 		}
432 
433 		last_msdu = __le32_to_cpu(rx_desc_msdu_end_common->info0) &
434 				RX_MSDU_END_INFO0_LAST_MSDU;
435 
436 		/* FIXME: why are we skipping the first part of the rx_desc? */
437 		trace_ath10k_htt_rx_desc(ar, (void *)rx_desc + sizeof(u32),
438 					 hw->rx_desc_ops->rx_desc_size - sizeof(u32));
439 
440 		if (last_msdu)
441 			break;
442 	}
443 
444 	if (skb_queue_empty(amsdu))
445 		msdu_chaining = -1;
446 
447 	/*
448 	 * Don't refill the ring yet.
449 	 *
450 	 * First, the elements popped here are still in use - it is not
451 	 * safe to overwrite them until the matching call to
452 	 * mpdu_desc_list_next. Second, for efficiency it is preferable to
453 	 * refill the rx ring with 1 PPDU's worth of rx buffers (something
454 	 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
455 	 * (something like 3 buffers). Consequently, we'll rely on the txrx
456 	 * SW to tell us when it is done pulling all the PPDU's rx buffers
457 	 * out of the rx ring, and then refill it just once.
458 	 */
459 
460 	return msdu_chaining;
461 }
462 
ath10k_htt_rx_pop_paddr(struct ath10k_htt * htt,u64 paddr)463 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
464 					       u64 paddr)
465 {
466 	struct ath10k *ar = htt->ar;
467 	struct ath10k_skb_rxcb *rxcb;
468 	struct sk_buff *msdu;
469 
470 	lockdep_assert_held(&htt->rx_ring.lock);
471 
472 	msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
473 	if (!msdu)
474 		return NULL;
475 
476 	rxcb = ATH10K_SKB_RXCB(msdu);
477 	hash_del(&rxcb->hlist);
478 	htt->rx_ring.fill_cnt--;
479 
480 	dma_unmap_single(htt->ar->dev, rxcb->paddr,
481 			 msdu->len + skb_tailroom(msdu),
482 			 DMA_FROM_DEVICE);
483 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
484 			msdu->data, msdu->len + skb_tailroom(msdu));
485 
486 	return msdu;
487 }
488 
ath10k_htt_append_frag_list(struct sk_buff * skb_head,struct sk_buff * frag_list,unsigned int frag_len)489 static inline void ath10k_htt_append_frag_list(struct sk_buff *skb_head,
490 					       struct sk_buff *frag_list,
491 					       unsigned int frag_len)
492 {
493 	skb_shinfo(skb_head)->frag_list = frag_list;
494 	skb_head->data_len = frag_len;
495 	skb_head->len += skb_head->data_len;
496 }
497 
ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt * htt,struct sk_buff * msdu,struct htt_rx_in_ord_msdu_desc ** msdu_desc)498 static int ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt *htt,
499 					     struct sk_buff *msdu,
500 					     struct htt_rx_in_ord_msdu_desc **msdu_desc)
501 {
502 	struct ath10k *ar = htt->ar;
503 	struct ath10k_hw_params *hw = &ar->hw_params;
504 	u32 paddr;
505 	struct sk_buff *frag_buf;
506 	struct sk_buff *prev_frag_buf;
507 	u8 last_frag;
508 	struct htt_rx_in_ord_msdu_desc *ind_desc = *msdu_desc;
509 	struct htt_rx_desc *rxd;
510 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
511 
512 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
513 	trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
514 
515 	skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
516 	skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
517 	skb_put(msdu, min(amsdu_len, ath10k_htt_rx_msdu_size(hw)));
518 	amsdu_len -= msdu->len;
519 
520 	last_frag = ind_desc->reserved;
521 	if (last_frag) {
522 		if (amsdu_len) {
523 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
524 				    __le16_to_cpu(ind_desc->msdu_len),
525 				    amsdu_len);
526 		}
527 		return 0;
528 	}
529 
530 	ind_desc++;
531 	paddr = __le32_to_cpu(ind_desc->msdu_paddr);
532 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
533 	if (!frag_buf) {
534 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%x", paddr);
535 		return -ENOENT;
536 	}
537 
538 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
539 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
540 
541 	amsdu_len -= frag_buf->len;
542 	prev_frag_buf = frag_buf;
543 	last_frag = ind_desc->reserved;
544 	while (!last_frag) {
545 		ind_desc++;
546 		paddr = __le32_to_cpu(ind_desc->msdu_paddr);
547 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
548 		if (!frag_buf) {
549 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%x",
550 				    paddr);
551 			prev_frag_buf->next = NULL;
552 			return -ENOENT;
553 		}
554 
555 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
556 		last_frag = ind_desc->reserved;
557 		amsdu_len -= frag_buf->len;
558 
559 		prev_frag_buf->next = frag_buf;
560 		prev_frag_buf = frag_buf;
561 	}
562 
563 	if (amsdu_len) {
564 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
565 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
566 	}
567 
568 	*msdu_desc = ind_desc;
569 
570 	prev_frag_buf->next = NULL;
571 	return 0;
572 }
573 
574 static int
ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt * htt,struct sk_buff * msdu,struct htt_rx_in_ord_msdu_desc_ext ** msdu_desc)575 ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt *htt,
576 				  struct sk_buff *msdu,
577 				  struct htt_rx_in_ord_msdu_desc_ext **msdu_desc)
578 {
579 	struct ath10k *ar = htt->ar;
580 	struct ath10k_hw_params *hw = &ar->hw_params;
581 	u64 paddr;
582 	struct sk_buff *frag_buf;
583 	struct sk_buff *prev_frag_buf;
584 	u8 last_frag;
585 	struct htt_rx_in_ord_msdu_desc_ext *ind_desc = *msdu_desc;
586 	struct htt_rx_desc *rxd;
587 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
588 
589 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
590 	trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
591 
592 	skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
593 	skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
594 	skb_put(msdu, min(amsdu_len, ath10k_htt_rx_msdu_size(hw)));
595 	amsdu_len -= msdu->len;
596 
597 	last_frag = ind_desc->reserved;
598 	if (last_frag) {
599 		if (amsdu_len) {
600 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
601 				    __le16_to_cpu(ind_desc->msdu_len),
602 				    amsdu_len);
603 		}
604 		return 0;
605 	}
606 
607 	ind_desc++;
608 	paddr = __le64_to_cpu(ind_desc->msdu_paddr);
609 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
610 	if (!frag_buf) {
611 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%llx", paddr);
612 		return -ENOENT;
613 	}
614 
615 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
616 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
617 
618 	amsdu_len -= frag_buf->len;
619 	prev_frag_buf = frag_buf;
620 	last_frag = ind_desc->reserved;
621 	while (!last_frag) {
622 		ind_desc++;
623 		paddr = __le64_to_cpu(ind_desc->msdu_paddr);
624 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
625 		if (!frag_buf) {
626 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%llx",
627 				    paddr);
628 			prev_frag_buf->next = NULL;
629 			return -ENOENT;
630 		}
631 
632 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
633 		last_frag = ind_desc->reserved;
634 		amsdu_len -= frag_buf->len;
635 
636 		prev_frag_buf->next = frag_buf;
637 		prev_frag_buf = frag_buf;
638 	}
639 
640 	if (amsdu_len) {
641 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
642 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
643 	}
644 
645 	*msdu_desc = ind_desc;
646 
647 	prev_frag_buf->next = NULL;
648 	return 0;
649 }
650 
ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt * htt,struct htt_rx_in_ord_ind * ev,struct sk_buff_head * list)651 static int ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt *htt,
652 					  struct htt_rx_in_ord_ind *ev,
653 					  struct sk_buff_head *list)
654 {
655 	struct ath10k *ar = htt->ar;
656 	struct ath10k_hw_params *hw = &ar->hw_params;
657 	struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs32;
658 	struct htt_rx_desc *rxd;
659 	struct rx_attention *rxd_attention;
660 	struct sk_buff *msdu;
661 	int msdu_count, ret;
662 	bool is_offload;
663 	u32 paddr;
664 
665 	lockdep_assert_held(&htt->rx_ring.lock);
666 
667 	msdu_count = __le16_to_cpu(ev->msdu_count);
668 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
669 
670 	while (msdu_count--) {
671 		paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
672 
673 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
674 		if (!msdu) {
675 			__skb_queue_purge(list);
676 			return -ENOENT;
677 		}
678 
679 		if (!is_offload && ar->monitor_arvif) {
680 			ret = ath10k_htt_rx_handle_amsdu_mon_32(htt, msdu,
681 								&msdu_desc);
682 			if (ret) {
683 				__skb_queue_purge(list);
684 				return ret;
685 			}
686 			__skb_queue_tail(list, msdu);
687 			msdu_desc++;
688 			continue;
689 		}
690 
691 		__skb_queue_tail(list, msdu);
692 
693 		if (!is_offload) {
694 			rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
695 			rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
696 
697 			trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
698 
699 			skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
700 			skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
701 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
702 
703 			if (!(__le32_to_cpu(rxd_attention->flags) &
704 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
705 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
706 				return -EIO;
707 			}
708 		}
709 
710 		msdu_desc++;
711 	}
712 
713 	return 0;
714 }
715 
ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt * htt,struct htt_rx_in_ord_ind * ev,struct sk_buff_head * list)716 static int ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt *htt,
717 					  struct htt_rx_in_ord_ind *ev,
718 					  struct sk_buff_head *list)
719 {
720 	struct ath10k *ar = htt->ar;
721 	struct ath10k_hw_params *hw = &ar->hw_params;
722 	struct htt_rx_in_ord_msdu_desc_ext *msdu_desc = ev->msdu_descs64;
723 	struct htt_rx_desc *rxd;
724 	struct rx_attention *rxd_attention;
725 	struct sk_buff *msdu;
726 	int msdu_count, ret;
727 	bool is_offload;
728 	u64 paddr;
729 
730 	lockdep_assert_held(&htt->rx_ring.lock);
731 
732 	msdu_count = __le16_to_cpu(ev->msdu_count);
733 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
734 
735 	while (msdu_count--) {
736 		paddr = __le64_to_cpu(msdu_desc->msdu_paddr);
737 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
738 		if (!msdu) {
739 			__skb_queue_purge(list);
740 			return -ENOENT;
741 		}
742 
743 		if (!is_offload && ar->monitor_arvif) {
744 			ret = ath10k_htt_rx_handle_amsdu_mon_64(htt, msdu,
745 								&msdu_desc);
746 			if (ret) {
747 				__skb_queue_purge(list);
748 				return ret;
749 			}
750 			__skb_queue_tail(list, msdu);
751 			msdu_desc++;
752 			continue;
753 		}
754 
755 		__skb_queue_tail(list, msdu);
756 
757 		if (!is_offload) {
758 			rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
759 			rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
760 
761 			trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
762 
763 			skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
764 			skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
765 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
766 
767 			if (!(__le32_to_cpu(rxd_attention->flags) &
768 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
769 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
770 				return -EIO;
771 			}
772 		}
773 
774 		msdu_desc++;
775 	}
776 
777 	return 0;
778 }
779 
ath10k_htt_rx_alloc(struct ath10k_htt * htt)780 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
781 {
782 	struct ath10k *ar = htt->ar;
783 	dma_addr_t paddr;
784 	void *vaddr, *vaddr_ring;
785 	size_t size;
786 	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
787 
788 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
789 		return 0;
790 
791 	htt->rx_confused = false;
792 
793 	/* XXX: The fill level could be changed during runtime in response to
794 	 * the host processing latency. Is this really worth it?
795 	 */
796 	htt->rx_ring.size = HTT_RX_RING_SIZE;
797 	htt->rx_ring.size_mask = htt->rx_ring.size - 1;
798 	htt->rx_ring.fill_level = ar->hw_params.rx_ring_fill_level;
799 
800 	if (!is_power_of_2(htt->rx_ring.size)) {
801 		ath10k_warn(ar, "htt rx ring size is not power of 2\n");
802 		return -EINVAL;
803 	}
804 
805 	htt->rx_ring.netbufs_ring =
806 		kcalloc(htt->rx_ring.size, sizeof(struct sk_buff *),
807 			GFP_KERNEL);
808 	if (!htt->rx_ring.netbufs_ring)
809 		goto err_netbuf;
810 
811 	size = ath10k_htt_get_rx_ring_size(htt);
812 
813 	vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
814 	if (!vaddr_ring)
815 		goto err_dma_ring;
816 
817 	ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
818 	htt->rx_ring.base_paddr = paddr;
819 
820 	vaddr = dma_alloc_coherent(htt->ar->dev,
821 				   sizeof(*htt->rx_ring.alloc_idx.vaddr),
822 				   &paddr, GFP_KERNEL);
823 	if (!vaddr)
824 		goto err_dma_idx;
825 
826 	htt->rx_ring.alloc_idx.vaddr = vaddr;
827 	htt->rx_ring.alloc_idx.paddr = paddr;
828 	htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
829 	*htt->rx_ring.alloc_idx.vaddr = 0;
830 
831 	/* Initialize the Rx refill retry timer */
832 	timer_setup(timer, ath10k_htt_rx_ring_refill_retry, 0);
833 
834 	spin_lock_init(&htt->rx_ring.lock);
835 
836 	htt->rx_ring.fill_cnt = 0;
837 	htt->rx_ring.sw_rd_idx.msdu_payld = 0;
838 	hash_init(htt->rx_ring.skb_table);
839 
840 	skb_queue_head_init(&htt->rx_msdus_q);
841 	skb_queue_head_init(&htt->rx_in_ord_compl_q);
842 	skb_queue_head_init(&htt->tx_fetch_ind_q);
843 	atomic_set(&htt->num_mpdus_ready, 0);
844 
845 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
846 		   htt->rx_ring.size, htt->rx_ring.fill_level);
847 	return 0;
848 
849 err_dma_idx:
850 	dma_free_coherent(htt->ar->dev,
851 			  ath10k_htt_get_rx_ring_size(htt),
852 			  vaddr_ring,
853 			  htt->rx_ring.base_paddr);
854 	ath10k_htt_config_paddrs_ring(htt, NULL);
855 err_dma_ring:
856 	kfree(htt->rx_ring.netbufs_ring);
857 	htt->rx_ring.netbufs_ring = NULL;
858 err_netbuf:
859 	return -ENOMEM;
860 }
861 
ath10k_htt_rx_crypto_param_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)862 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
863 					  enum htt_rx_mpdu_encrypt_type type)
864 {
865 	switch (type) {
866 	case HTT_RX_MPDU_ENCRYPT_NONE:
867 		return 0;
868 	case HTT_RX_MPDU_ENCRYPT_WEP40:
869 	case HTT_RX_MPDU_ENCRYPT_WEP104:
870 		return IEEE80211_WEP_IV_LEN;
871 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
872 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
873 		return IEEE80211_TKIP_IV_LEN;
874 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
875 		return IEEE80211_CCMP_HDR_LEN;
876 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
877 		return IEEE80211_CCMP_256_HDR_LEN;
878 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
879 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
880 		return IEEE80211_GCMP_HDR_LEN;
881 	case HTT_RX_MPDU_ENCRYPT_WEP128:
882 	case HTT_RX_MPDU_ENCRYPT_WAPI:
883 		break;
884 	}
885 
886 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
887 	return 0;
888 }
889 
890 #define MICHAEL_MIC_LEN 8
891 
ath10k_htt_rx_crypto_mic_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)892 static int ath10k_htt_rx_crypto_mic_len(struct ath10k *ar,
893 					enum htt_rx_mpdu_encrypt_type type)
894 {
895 	switch (type) {
896 	case HTT_RX_MPDU_ENCRYPT_NONE:
897 	case HTT_RX_MPDU_ENCRYPT_WEP40:
898 	case HTT_RX_MPDU_ENCRYPT_WEP104:
899 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
900 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
901 		return 0;
902 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
903 		return IEEE80211_CCMP_MIC_LEN;
904 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
905 		return IEEE80211_CCMP_256_MIC_LEN;
906 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
907 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
908 		return IEEE80211_GCMP_MIC_LEN;
909 	case HTT_RX_MPDU_ENCRYPT_WEP128:
910 	case HTT_RX_MPDU_ENCRYPT_WAPI:
911 		break;
912 	}
913 
914 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
915 	return 0;
916 }
917 
ath10k_htt_rx_crypto_icv_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)918 static int ath10k_htt_rx_crypto_icv_len(struct ath10k *ar,
919 					enum htt_rx_mpdu_encrypt_type type)
920 {
921 	switch (type) {
922 	case HTT_RX_MPDU_ENCRYPT_NONE:
923 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
924 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
925 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
926 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
927 		return 0;
928 	case HTT_RX_MPDU_ENCRYPT_WEP40:
929 	case HTT_RX_MPDU_ENCRYPT_WEP104:
930 		return IEEE80211_WEP_ICV_LEN;
931 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
932 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
933 		return IEEE80211_TKIP_ICV_LEN;
934 	case HTT_RX_MPDU_ENCRYPT_WEP128:
935 	case HTT_RX_MPDU_ENCRYPT_WAPI:
936 		break;
937 	}
938 
939 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
940 	return 0;
941 }
942 
943 struct amsdu_subframe_hdr {
944 	u8 dst[ETH_ALEN];
945 	u8 src[ETH_ALEN];
946 	__be16 len;
947 } __packed;
948 
949 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
950 
ath10k_bw_to_mac80211_bw(u8 bw)951 static inline u8 ath10k_bw_to_mac80211_bw(u8 bw)
952 {
953 	u8 ret = 0;
954 
955 	switch (bw) {
956 	case 0:
957 		ret = RATE_INFO_BW_20;
958 		break;
959 	case 1:
960 		ret = RATE_INFO_BW_40;
961 		break;
962 	case 2:
963 		ret = RATE_INFO_BW_80;
964 		break;
965 	case 3:
966 		ret = RATE_INFO_BW_160;
967 		break;
968 	}
969 
970 	return ret;
971 }
972 
ath10k_htt_rx_h_rates(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)973 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
974 				  struct ieee80211_rx_status *status,
975 				  struct htt_rx_desc *rxd)
976 {
977 	struct ath10k_hw_params *hw = &ar->hw_params;
978 	struct rx_attention *rxd_attention;
979 	struct rx_mpdu_start *rxd_mpdu_start;
980 	struct rx_mpdu_end *rxd_mpdu_end;
981 	struct rx_msdu_start_common *rxd_msdu_start_common;
982 	struct rx_msdu_end_common *rxd_msdu_end_common;
983 	struct rx_ppdu_start *rxd_ppdu_start;
984 	struct ieee80211_supported_band *sband;
985 	u8 cck, rate, bw, sgi, mcs, nss;
986 	u8 *rxd_msdu_payload;
987 	u8 preamble = 0;
988 	u8 group_id;
989 	u32 info1, info2, info3;
990 	u32 stbc, nsts_su;
991 
992 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
993 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
994 	rxd_mpdu_end = ath10k_htt_rx_desc_get_mpdu_end(hw, rxd);
995 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
996 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
997 	rxd_ppdu_start = ath10k_htt_rx_desc_get_ppdu_start(hw, rxd);
998 	rxd_msdu_payload = ath10k_htt_rx_desc_get_msdu_payload(hw, rxd);
999 
1000 	info1 = __le32_to_cpu(rxd_ppdu_start->info1);
1001 	info2 = __le32_to_cpu(rxd_ppdu_start->info2);
1002 	info3 = __le32_to_cpu(rxd_ppdu_start->info3);
1003 
1004 	preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
1005 
1006 	switch (preamble) {
1007 	case HTT_RX_LEGACY:
1008 		/* To get legacy rate index band is required. Since band can't
1009 		 * be undefined check if freq is non-zero.
1010 		 */
1011 		if (!status->freq)
1012 			return;
1013 
1014 		cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
1015 		rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
1016 		rate &= ~RX_PPDU_START_RATE_FLAG;
1017 
1018 		sband = &ar->mac.sbands[status->band];
1019 		status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
1020 		break;
1021 	case HTT_RX_HT:
1022 	case HTT_RX_HT_WITH_TXBF:
1023 		/* HT-SIG - Table 20-11 in info2 and info3 */
1024 		mcs = info2 & 0x1F;
1025 		nss = mcs >> 3;
1026 		bw = (info2 >> 7) & 1;
1027 		sgi = (info3 >> 7) & 1;
1028 
1029 		status->rate_idx = mcs;
1030 		status->encoding = RX_ENC_HT;
1031 		if (sgi)
1032 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1033 		if (bw)
1034 			status->bw = RATE_INFO_BW_40;
1035 		break;
1036 	case HTT_RX_VHT:
1037 	case HTT_RX_VHT_WITH_TXBF:
1038 		/* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
1039 		 * TODO check this
1040 		 */
1041 		bw = info2 & 3;
1042 		sgi = info3 & 1;
1043 		stbc = (info2 >> 3) & 1;
1044 		group_id = (info2 >> 4) & 0x3F;
1045 
1046 		if (GROUP_ID_IS_SU_MIMO(group_id)) {
1047 			mcs = (info3 >> 4) & 0x0F;
1048 			nsts_su = ((info2 >> 10) & 0x07);
1049 			if (stbc)
1050 				nss = (nsts_su >> 2) + 1;
1051 			else
1052 				nss = (nsts_su + 1);
1053 		} else {
1054 			/* Hardware doesn't decode VHT-SIG-B into Rx descriptor
1055 			 * so it's impossible to decode MCS. Also since
1056 			 * firmware consumes Group Id Management frames host
1057 			 * has no knowledge regarding group/user position
1058 			 * mapping so it's impossible to pick the correct Nsts
1059 			 * from VHT-SIG-A1.
1060 			 *
1061 			 * Bandwidth and SGI are valid so report the rateinfo
1062 			 * on best-effort basis.
1063 			 */
1064 			mcs = 0;
1065 			nss = 1;
1066 		}
1067 
1068 		if (mcs > 0x09) {
1069 			ath10k_warn(ar, "invalid MCS received %u\n", mcs);
1070 			ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
1071 				    __le32_to_cpu(rxd_attention->flags),
1072 				    __le32_to_cpu(rxd_mpdu_start->info0),
1073 				    __le32_to_cpu(rxd_mpdu_start->info1),
1074 				    __le32_to_cpu(rxd_msdu_start_common->info0),
1075 				    __le32_to_cpu(rxd_msdu_start_common->info1),
1076 				    rxd_ppdu_start->info0,
1077 				    __le32_to_cpu(rxd_ppdu_start->info1),
1078 				    __le32_to_cpu(rxd_ppdu_start->info2),
1079 				    __le32_to_cpu(rxd_ppdu_start->info3),
1080 				    __le32_to_cpu(rxd_ppdu_start->info4));
1081 
1082 			ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
1083 				    __le32_to_cpu(rxd_msdu_end_common->info0),
1084 				    __le32_to_cpu(rxd_mpdu_end->info0));
1085 
1086 			ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
1087 					"rx desc msdu payload: ",
1088 					rxd_msdu_payload, 50);
1089 		}
1090 
1091 		status->rate_idx = mcs;
1092 		status->nss = nss;
1093 
1094 		if (sgi)
1095 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1096 
1097 		status->bw = ath10k_bw_to_mac80211_bw(bw);
1098 		status->encoding = RX_ENC_VHT;
1099 		break;
1100 	default:
1101 		break;
1102 	}
1103 }
1104 
1105 static struct ieee80211_channel *
ath10k_htt_rx_h_peer_channel(struct ath10k * ar,struct htt_rx_desc * rxd)1106 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
1107 {
1108 	struct ath10k_hw_params *hw = &ar->hw_params;
1109 	struct rx_attention *rxd_attention;
1110 	struct rx_msdu_end_common *rxd_msdu_end_common;
1111 	struct rx_mpdu_start *rxd_mpdu_start;
1112 	struct ath10k_peer *peer;
1113 	struct ath10k_vif *arvif;
1114 	struct cfg80211_chan_def def;
1115 	u16 peer_id;
1116 
1117 	lockdep_assert_held(&ar->data_lock);
1118 
1119 	if (!rxd)
1120 		return NULL;
1121 
1122 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1123 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1124 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
1125 
1126 	if (rxd_attention->flags &
1127 	    __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
1128 		return NULL;
1129 
1130 	if (!(rxd_msdu_end_common->info0 &
1131 	      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
1132 		return NULL;
1133 
1134 	peer_id = MS(__le32_to_cpu(rxd_mpdu_start->info0),
1135 		     RX_MPDU_START_INFO0_PEER_IDX);
1136 
1137 	peer = ath10k_peer_find_by_id(ar, peer_id);
1138 	if (!peer)
1139 		return NULL;
1140 
1141 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
1142 	if (WARN_ON_ONCE(!arvif))
1143 		return NULL;
1144 
1145 	if (ath10k_mac_vif_chan(arvif->vif, &def))
1146 		return NULL;
1147 
1148 	return def.chan;
1149 }
1150 
1151 static struct ieee80211_channel *
ath10k_htt_rx_h_vdev_channel(struct ath10k * ar,u32 vdev_id)1152 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
1153 {
1154 	struct ath10k_vif *arvif;
1155 	struct cfg80211_chan_def def;
1156 
1157 	lockdep_assert_held(&ar->data_lock);
1158 
1159 	list_for_each_entry(arvif, &ar->arvifs, list) {
1160 		if (arvif->vdev_id == vdev_id &&
1161 		    ath10k_mac_vif_chan(arvif->vif, &def) == 0)
1162 			return def.chan;
1163 	}
1164 
1165 	return NULL;
1166 }
1167 
1168 static void
ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf,void * data)1169 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
1170 			      struct ieee80211_chanctx_conf *conf,
1171 			      void *data)
1172 {
1173 	struct cfg80211_chan_def *def = data;
1174 
1175 	*def = conf->def;
1176 }
1177 
1178 static struct ieee80211_channel *
ath10k_htt_rx_h_any_channel(struct ath10k * ar)1179 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
1180 {
1181 	struct cfg80211_chan_def def = {};
1182 
1183 	ieee80211_iter_chan_contexts_atomic(ar->hw,
1184 					    ath10k_htt_rx_h_any_chan_iter,
1185 					    &def);
1186 
1187 	return def.chan;
1188 }
1189 
ath10k_htt_rx_h_channel(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd,u32 vdev_id)1190 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
1191 				    struct ieee80211_rx_status *status,
1192 				    struct htt_rx_desc *rxd,
1193 				    u32 vdev_id)
1194 {
1195 	struct ieee80211_channel *ch;
1196 
1197 	spin_lock_bh(&ar->data_lock);
1198 	ch = ar->scan_channel;
1199 	if (!ch)
1200 		ch = ar->rx_channel;
1201 	if (!ch)
1202 		ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
1203 	if (!ch)
1204 		ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
1205 	if (!ch)
1206 		ch = ath10k_htt_rx_h_any_channel(ar);
1207 	if (!ch)
1208 		ch = ar->tgt_oper_chan;
1209 	spin_unlock_bh(&ar->data_lock);
1210 
1211 	if (!ch)
1212 		return false;
1213 
1214 	status->band = ch->band;
1215 	status->freq = ch->center_freq;
1216 
1217 	return true;
1218 }
1219 
ath10k_htt_rx_h_signal(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)1220 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
1221 				   struct ieee80211_rx_status *status,
1222 				   struct htt_rx_desc *rxd)
1223 {
1224 	struct ath10k_hw_params *hw = &ar->hw_params;
1225 	struct rx_ppdu_start *rxd_ppdu_start = ath10k_htt_rx_desc_get_ppdu_start(hw, rxd);
1226 	int i;
1227 
1228 	for (i = 0; i < IEEE80211_MAX_CHAINS ; i++) {
1229 		status->chains &= ~BIT(i);
1230 
1231 		if (rxd_ppdu_start->rssi_chains[i].pri20_mhz != 0x80) {
1232 			status->chain_signal[i] = ATH10K_DEFAULT_NOISE_FLOOR +
1233 				rxd_ppdu_start->rssi_chains[i].pri20_mhz;
1234 
1235 			status->chains |= BIT(i);
1236 		}
1237 	}
1238 
1239 	/* FIXME: Get real NF */
1240 	status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
1241 			 rxd_ppdu_start->rssi_comb;
1242 	status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
1243 }
1244 
ath10k_htt_rx_h_mactime(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)1245 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
1246 				    struct ieee80211_rx_status *status,
1247 				    struct htt_rx_desc *rxd)
1248 {
1249 	struct ath10k_hw_params *hw = &ar->hw_params;
1250 	struct rx_ppdu_end_common *rxd_ppdu_end_common;
1251 
1252 	rxd_ppdu_end_common = ath10k_htt_rx_desc_get_ppdu_end(hw, rxd);
1253 
1254 	/* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
1255 	 * means all prior MSDUs in a PPDU are reported to mac80211 without the
1256 	 * TSF. Is it worth holding frames until end of PPDU is known?
1257 	 *
1258 	 * FIXME: Can we get/compute 64bit TSF?
1259 	 */
1260 	status->mactime = __le32_to_cpu(rxd_ppdu_end_common->tsf_timestamp);
1261 	status->flag |= RX_FLAG_MACTIME_END;
1262 }
1263 
ath10k_htt_rx_h_ppdu(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * status,u32 vdev_id)1264 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
1265 				 struct sk_buff_head *amsdu,
1266 				 struct ieee80211_rx_status *status,
1267 				 u32 vdev_id)
1268 {
1269 	struct sk_buff *first;
1270 	struct ath10k_hw_params *hw = &ar->hw_params;
1271 	struct htt_rx_desc *rxd;
1272 	struct rx_attention *rxd_attention;
1273 	bool is_first_ppdu;
1274 	bool is_last_ppdu;
1275 
1276 	if (skb_queue_empty(amsdu))
1277 		return;
1278 
1279 	first = skb_peek(amsdu);
1280 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1281 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
1282 
1283 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1284 
1285 	is_first_ppdu = !!(rxd_attention->flags &
1286 			   __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
1287 	is_last_ppdu = !!(rxd_attention->flags &
1288 			  __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
1289 
1290 	if (is_first_ppdu) {
1291 		/* New PPDU starts so clear out the old per-PPDU status. */
1292 		status->freq = 0;
1293 		status->rate_idx = 0;
1294 		status->nss = 0;
1295 		status->encoding = RX_ENC_LEGACY;
1296 		status->bw = RATE_INFO_BW_20;
1297 
1298 		status->flag &= ~RX_FLAG_MACTIME;
1299 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1300 
1301 		status->flag &= ~(RX_FLAG_AMPDU_IS_LAST);
1302 		status->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
1303 		status->ampdu_reference = ar->ampdu_reference;
1304 
1305 		ath10k_htt_rx_h_signal(ar, status, rxd);
1306 		ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
1307 		ath10k_htt_rx_h_rates(ar, status, rxd);
1308 	}
1309 
1310 	if (is_last_ppdu) {
1311 		ath10k_htt_rx_h_mactime(ar, status, rxd);
1312 
1313 		/* set ampdu last segment flag */
1314 		status->flag |= RX_FLAG_AMPDU_IS_LAST;
1315 		ar->ampdu_reference++;
1316 	}
1317 }
1318 
1319 static const char * const tid_to_ac[] = {
1320 	"BE",
1321 	"BK",
1322 	"BK",
1323 	"BE",
1324 	"VI",
1325 	"VI",
1326 	"VO",
1327 	"VO",
1328 };
1329 
ath10k_get_tid(struct ieee80211_hdr * hdr,char * out,size_t size)1330 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
1331 {
1332 	u8 *qc;
1333 	int tid;
1334 
1335 	if (!ieee80211_is_data_qos(hdr->frame_control))
1336 		return "";
1337 
1338 	qc = ieee80211_get_qos_ctl(hdr);
1339 	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1340 	if (tid < 8)
1341 		snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
1342 	else
1343 		snprintf(out, size, "tid %d", tid);
1344 
1345 	return out;
1346 }
1347 
ath10k_htt_rx_h_queue_msdu(struct ath10k * ar,struct ieee80211_rx_status * rx_status,struct sk_buff * skb)1348 static void ath10k_htt_rx_h_queue_msdu(struct ath10k *ar,
1349 				       struct ieee80211_rx_status *rx_status,
1350 				       struct sk_buff *skb)
1351 {
1352 	struct ieee80211_rx_status *status;
1353 
1354 	status = IEEE80211_SKB_RXCB(skb);
1355 	*status = *rx_status;
1356 
1357 	skb_queue_tail(&ar->htt.rx_msdus_q, skb);
1358 }
1359 
ath10k_process_rx(struct ath10k * ar,struct sk_buff * skb)1360 static void ath10k_process_rx(struct ath10k *ar, struct sk_buff *skb)
1361 {
1362 	struct ieee80211_rx_status *status;
1363 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1364 	char tid[32];
1365 
1366 	status = IEEE80211_SKB_RXCB(skb);
1367 
1368 	if (!(ar->filter_flags & FIF_FCSFAIL) &&
1369 	    status->flag & RX_FLAG_FAILED_FCS_CRC) {
1370 		ar->stats.rx_crc_err_drop++;
1371 		dev_kfree_skb_any(skb);
1372 		return;
1373 	}
1374 
1375 	ath10k_dbg(ar, ATH10K_DBG_DATA,
1376 		   "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",
1377 		   skb,
1378 		   skb->len,
1379 		   ieee80211_get_SA(hdr),
1380 		   ath10k_get_tid(hdr, tid, sizeof(tid)),
1381 		   is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
1382 							"mcast" : "ucast",
1383 		   IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
1384 		   (status->encoding == RX_ENC_LEGACY) ? "legacy" : "",
1385 		   (status->encoding == RX_ENC_HT) ? "ht" : "",
1386 		   (status->encoding == RX_ENC_VHT) ? "vht" : "",
1387 		   (status->bw == RATE_INFO_BW_40) ? "40" : "",
1388 		   (status->bw == RATE_INFO_BW_80) ? "80" : "",
1389 		   (status->bw == RATE_INFO_BW_160) ? "160" : "",
1390 		   status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "",
1391 		   status->rate_idx,
1392 		   status->nss,
1393 		   status->freq,
1394 		   status->band, status->flag,
1395 		   !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1396 		   !!(status->flag & RX_FLAG_MMIC_ERROR),
1397 		   !!(status->flag & RX_FLAG_AMSDU_MORE));
1398 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1399 			skb->data, skb->len);
1400 	trace_ath10k_rx_hdr(ar, skb->data, skb->len);
1401 	trace_ath10k_rx_payload(ar, skb->data, skb->len);
1402 
1403 	ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
1404 }
1405 
ath10k_htt_rx_nwifi_hdrlen(struct ath10k * ar,struct ieee80211_hdr * hdr)1406 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
1407 				      struct ieee80211_hdr *hdr)
1408 {
1409 	int len = ieee80211_hdrlen(hdr->frame_control);
1410 
1411 	if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
1412 		      ar->running_fw->fw_file.fw_features))
1413 		len = round_up(len, 4);
1414 
1415 	return len;
1416 }
1417 
ath10k_htt_rx_h_undecap_raw(struct ath10k * ar,struct sk_buff * msdu,struct ieee80211_rx_status * status,enum htt_rx_mpdu_encrypt_type enctype,bool is_decrypted,const u8 first_hdr[64])1418 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
1419 					struct sk_buff *msdu,
1420 					struct ieee80211_rx_status *status,
1421 					enum htt_rx_mpdu_encrypt_type enctype,
1422 					bool is_decrypted,
1423 					const u8 first_hdr[64])
1424 {
1425 	struct ieee80211_hdr *hdr;
1426 	struct ath10k_hw_params *hw = &ar->hw_params;
1427 	struct htt_rx_desc *rxd;
1428 	struct rx_msdu_end_common *rxd_msdu_end_common;
1429 	size_t hdr_len;
1430 	size_t crypto_len;
1431 	bool is_first;
1432 	bool is_last;
1433 	bool msdu_limit_err;
1434 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1435 	u8 *qos;
1436 
1437 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1438 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1439 
1440 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1441 	is_first = !!(rxd_msdu_end_common->info0 &
1442 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1443 	is_last = !!(rxd_msdu_end_common->info0 &
1444 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1445 
1446 	/* Delivered decapped frame:
1447 	 * [802.11 header]
1448 	 * [crypto param] <-- can be trimmed if !fcs_err &&
1449 	 *                    !decrypt_err && !peer_idx_invalid
1450 	 * [amsdu header] <-- only if A-MSDU
1451 	 * [rfc1042/llc]
1452 	 * [payload]
1453 	 * [FCS] <-- at end, needs to be trimmed
1454 	 */
1455 
1456 	/* Some hardwares(QCA99x0 variants) limit number of msdus in a-msdu when
1457 	 * deaggregate, so that unwanted MSDU-deaggregation is avoided for
1458 	 * error packets. If limit exceeds, hw sends all remaining MSDUs as
1459 	 * a single last MSDU with this msdu limit error set.
1460 	 */
1461 	msdu_limit_err = ath10k_htt_rx_desc_msdu_limit_error(hw, rxd);
1462 
1463 	/* If MSDU limit error happens, then don't warn on, the partial raw MSDU
1464 	 * without first MSDU is expected in that case, and handled later here.
1465 	 */
1466 	/* This probably shouldn't happen but warn just in case */
1467 	if (WARN_ON_ONCE(!is_first && !msdu_limit_err))
1468 		return;
1469 
1470 	/* This probably shouldn't happen but warn just in case */
1471 	if (WARN_ON_ONCE(!(is_first && is_last) && !msdu_limit_err))
1472 		return;
1473 
1474 	skb_trim(msdu, msdu->len - FCS_LEN);
1475 
1476 	/* Push original 80211 header */
1477 	if (unlikely(msdu_limit_err)) {
1478 		hdr = (struct ieee80211_hdr *)first_hdr;
1479 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1480 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1481 
1482 		if (ieee80211_is_data_qos(hdr->frame_control)) {
1483 			qos = ieee80211_get_qos_ctl(hdr);
1484 			qos[0] |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1485 		}
1486 
1487 		if (crypto_len)
1488 			memcpy(skb_push(msdu, crypto_len),
1489 			       (void *)hdr + round_up(hdr_len, bytes_aligned),
1490 			       crypto_len);
1491 
1492 		memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1493 	}
1494 
1495 	/* In most cases this will be true for sniffed frames. It makes sense
1496 	 * to deliver them as-is without stripping the crypto param. This is
1497 	 * necessary for software based decryption.
1498 	 *
1499 	 * If there's no error then the frame is decrypted. At least that is
1500 	 * the case for frames that come in via fragmented rx indication.
1501 	 */
1502 	if (!is_decrypted)
1503 		return;
1504 
1505 	/* The payload is decrypted so strip crypto params. Start from tail
1506 	 * since hdr is used to compute some stuff.
1507 	 */
1508 
1509 	hdr = (void *)msdu->data;
1510 
1511 	/* Tail */
1512 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1513 		skb_trim(msdu, msdu->len -
1514 			 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1515 
1516 		skb_trim(msdu, msdu->len -
1517 			 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1518 	} else {
1519 		/* MIC */
1520 		if (status->flag & RX_FLAG_MIC_STRIPPED)
1521 			skb_trim(msdu, msdu->len -
1522 				 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1523 
1524 		/* ICV */
1525 		if (status->flag & RX_FLAG_ICV_STRIPPED)
1526 			skb_trim(msdu, msdu->len -
1527 				 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1528 	}
1529 
1530 	/* MMIC */
1531 	if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1532 	    !ieee80211_has_morefrags(hdr->frame_control) &&
1533 	    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1534 		skb_trim(msdu, msdu->len - MICHAEL_MIC_LEN);
1535 
1536 	/* Head */
1537 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1538 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1539 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1540 
1541 		memmove((void *)msdu->data + crypto_len,
1542 			(void *)msdu->data, hdr_len);
1543 		skb_pull(msdu, crypto_len);
1544 	}
1545 }
1546 
ath10k_htt_rx_h_undecap_nwifi(struct ath10k * ar,struct sk_buff * msdu,struct ieee80211_rx_status * status,const u8 first_hdr[64],enum htt_rx_mpdu_encrypt_type enctype)1547 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1548 					  struct sk_buff *msdu,
1549 					  struct ieee80211_rx_status *status,
1550 					  const u8 first_hdr[64],
1551 					  enum htt_rx_mpdu_encrypt_type enctype)
1552 {
1553 	struct ath10k_hw_params *hw = &ar->hw_params;
1554 	struct ieee80211_hdr *hdr;
1555 	struct htt_rx_desc *rxd;
1556 	size_t hdr_len;
1557 	u8 da[ETH_ALEN];
1558 	u8 sa[ETH_ALEN];
1559 	int l3_pad_bytes;
1560 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1561 
1562 	/* Delivered decapped frame:
1563 	 * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1564 	 * [rfc1042/llc]
1565 	 *
1566 	 * Note: The nwifi header doesn't have QoS Control and is
1567 	 * (always?) a 3addr frame.
1568 	 *
1569 	 * Note2: There's no A-MSDU subframe header. Even if it's part
1570 	 * of an A-MSDU.
1571 	 */
1572 
1573 	/* pull decapped header and copy SA & DA */
1574 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, (void *)msdu->data -
1575 				    hw->rx_desc_ops->rx_desc_size);
1576 
1577 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1578 	skb_put(msdu, l3_pad_bytes);
1579 
1580 	hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes);
1581 
1582 	hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1583 	ether_addr_copy(da, ieee80211_get_DA(hdr));
1584 	ether_addr_copy(sa, ieee80211_get_SA(hdr));
1585 	skb_pull(msdu, hdr_len);
1586 
1587 	/* push original 802.11 header */
1588 	hdr = (struct ieee80211_hdr *)first_hdr;
1589 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1590 
1591 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1592 		memcpy(skb_push(msdu,
1593 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1594 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1595 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1596 	}
1597 
1598 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1599 
1600 	/* original 802.11 header has a different DA and in
1601 	 * case of 4addr it may also have different SA
1602 	 */
1603 	hdr = (struct ieee80211_hdr *)msdu->data;
1604 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1605 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1606 }
1607 
ath10k_htt_rx_h_find_rfc1042(struct ath10k * ar,struct sk_buff * msdu,enum htt_rx_mpdu_encrypt_type enctype)1608 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1609 					  struct sk_buff *msdu,
1610 					  enum htt_rx_mpdu_encrypt_type enctype)
1611 {
1612 	struct ieee80211_hdr *hdr;
1613 	struct ath10k_hw_params *hw = &ar->hw_params;
1614 	struct htt_rx_desc *rxd;
1615 	struct rx_msdu_end_common *rxd_msdu_end_common;
1616 	u8 *rxd_rx_hdr_status;
1617 	size_t hdr_len, crypto_len;
1618 	void *rfc1042;
1619 	bool is_first, is_last, is_amsdu;
1620 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1621 
1622 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1623 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1624 
1625 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1626 	rxd_rx_hdr_status = ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
1627 	hdr = (void *)rxd_rx_hdr_status;
1628 
1629 	is_first = !!(rxd_msdu_end_common->info0 &
1630 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1631 	is_last = !!(rxd_msdu_end_common->info0 &
1632 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1633 	is_amsdu = !(is_first && is_last);
1634 
1635 	rfc1042 = hdr;
1636 
1637 	if (is_first) {
1638 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1639 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1640 
1641 		rfc1042 += round_up(hdr_len, bytes_aligned) +
1642 			   round_up(crypto_len, bytes_aligned);
1643 	}
1644 
1645 	if (is_amsdu)
1646 		rfc1042 += sizeof(struct amsdu_subframe_hdr);
1647 
1648 	return rfc1042;
1649 }
1650 
ath10k_htt_rx_h_undecap_eth(struct ath10k * ar,struct sk_buff * msdu,struct ieee80211_rx_status * status,const u8 first_hdr[64],enum htt_rx_mpdu_encrypt_type enctype)1651 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1652 					struct sk_buff *msdu,
1653 					struct ieee80211_rx_status *status,
1654 					const u8 first_hdr[64],
1655 					enum htt_rx_mpdu_encrypt_type enctype)
1656 {
1657 	struct ath10k_hw_params *hw = &ar->hw_params;
1658 	struct ieee80211_hdr *hdr;
1659 	struct ethhdr *eth;
1660 	size_t hdr_len;
1661 	void *rfc1042;
1662 	u8 da[ETH_ALEN];
1663 	u8 sa[ETH_ALEN];
1664 	int l3_pad_bytes;
1665 	struct htt_rx_desc *rxd;
1666 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1667 
1668 	/* Delivered decapped frame:
1669 	 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1670 	 * [payload]
1671 	 */
1672 
1673 	rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1674 	if (WARN_ON_ONCE(!rfc1042))
1675 		return;
1676 
1677 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1678 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1679 
1680 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1681 	skb_put(msdu, l3_pad_bytes);
1682 	skb_pull(msdu, l3_pad_bytes);
1683 
1684 	/* pull decapped header and copy SA & DA */
1685 	eth = (struct ethhdr *)msdu->data;
1686 	ether_addr_copy(da, eth->h_dest);
1687 	ether_addr_copy(sa, eth->h_source);
1688 	skb_pull(msdu, sizeof(struct ethhdr));
1689 
1690 	/* push rfc1042/llc/snap */
1691 	memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1692 	       sizeof(struct rfc1042_hdr));
1693 
1694 	/* push original 802.11 header */
1695 	hdr = (struct ieee80211_hdr *)first_hdr;
1696 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1697 
1698 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1699 		memcpy(skb_push(msdu,
1700 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1701 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1702 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1703 	}
1704 
1705 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1706 
1707 	/* original 802.11 header has a different DA and in
1708 	 * case of 4addr it may also have different SA
1709 	 */
1710 	hdr = (struct ieee80211_hdr *)msdu->data;
1711 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1712 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1713 }
1714 
ath10k_htt_rx_h_undecap_snap(struct ath10k * ar,struct sk_buff * msdu,struct ieee80211_rx_status * status,const u8 first_hdr[64],enum htt_rx_mpdu_encrypt_type enctype)1715 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1716 					 struct sk_buff *msdu,
1717 					 struct ieee80211_rx_status *status,
1718 					 const u8 first_hdr[64],
1719 					 enum htt_rx_mpdu_encrypt_type enctype)
1720 {
1721 	struct ath10k_hw_params *hw = &ar->hw_params;
1722 	struct ieee80211_hdr *hdr;
1723 	size_t hdr_len;
1724 	int l3_pad_bytes;
1725 	struct htt_rx_desc *rxd;
1726 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1727 
1728 	/* Delivered decapped frame:
1729 	 * [amsdu header] <-- replaced with 802.11 hdr
1730 	 * [rfc1042/llc]
1731 	 * [payload]
1732 	 */
1733 
1734 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1735 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1736 
1737 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1738 
1739 	skb_put(msdu, l3_pad_bytes);
1740 	skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes);
1741 
1742 	hdr = (struct ieee80211_hdr *)first_hdr;
1743 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1744 
1745 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1746 		memcpy(skb_push(msdu,
1747 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1748 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1749 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1750 	}
1751 
1752 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1753 }
1754 
ath10k_htt_rx_h_undecap(struct ath10k * ar,struct sk_buff * msdu,struct ieee80211_rx_status * status,u8 first_hdr[64],enum htt_rx_mpdu_encrypt_type enctype,bool is_decrypted)1755 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1756 				    struct sk_buff *msdu,
1757 				    struct ieee80211_rx_status *status,
1758 				    u8 first_hdr[64],
1759 				    enum htt_rx_mpdu_encrypt_type enctype,
1760 				    bool is_decrypted)
1761 {
1762 	struct ath10k_hw_params *hw = &ar->hw_params;
1763 	struct htt_rx_desc *rxd;
1764 	struct rx_msdu_start_common *rxd_msdu_start_common;
1765 	enum rx_msdu_decap_format decap;
1766 
1767 	/* First msdu's decapped header:
1768 	 * [802.11 header] <-- padded to 4 bytes long
1769 	 * [crypto param] <-- padded to 4 bytes long
1770 	 * [amsdu header] <-- only if A-MSDU
1771 	 * [rfc1042/llc]
1772 	 *
1773 	 * Other (2nd, 3rd, ..) msdu's decapped header:
1774 	 * [amsdu header] <-- only if A-MSDU
1775 	 * [rfc1042/llc]
1776 	 */
1777 
1778 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1779 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1780 
1781 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
1782 	decap = MS(__le32_to_cpu(rxd_msdu_start_common->info1),
1783 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
1784 
1785 	switch (decap) {
1786 	case RX_MSDU_DECAP_RAW:
1787 		ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1788 					    is_decrypted, first_hdr);
1789 		break;
1790 	case RX_MSDU_DECAP_NATIVE_WIFI:
1791 		ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
1792 					      enctype);
1793 		break;
1794 	case RX_MSDU_DECAP_ETHERNET2_DIX:
1795 		ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1796 		break;
1797 	case RX_MSDU_DECAP_8023_SNAP_LLC:
1798 		ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr,
1799 					     enctype);
1800 		break;
1801 	}
1802 }
1803 
ath10k_htt_rx_get_csum_state(struct ath10k_hw_params * hw,struct sk_buff * skb)1804 static int ath10k_htt_rx_get_csum_state(struct ath10k_hw_params *hw, struct sk_buff *skb)
1805 {
1806 	struct htt_rx_desc *rxd;
1807 	struct rx_attention *rxd_attention;
1808 	struct rx_msdu_start_common *rxd_msdu_start_common;
1809 	u32 flags, info;
1810 	bool is_ip4, is_ip6;
1811 	bool is_tcp, is_udp;
1812 	bool ip_csum_ok, tcpudp_csum_ok;
1813 
1814 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1815 				    (void *)skb->data - hw->rx_desc_ops->rx_desc_size);
1816 
1817 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1818 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
1819 	flags = __le32_to_cpu(rxd_attention->flags);
1820 	info = __le32_to_cpu(rxd_msdu_start_common->info1);
1821 
1822 	is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1823 	is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1824 	is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1825 	is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1826 	ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1827 	tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1828 
1829 	if (!is_ip4 && !is_ip6)
1830 		return CHECKSUM_NONE;
1831 	if (!is_tcp && !is_udp)
1832 		return CHECKSUM_NONE;
1833 	if (!ip_csum_ok)
1834 		return CHECKSUM_NONE;
1835 	if (!tcpudp_csum_ok)
1836 		return CHECKSUM_NONE;
1837 
1838 	return CHECKSUM_UNNECESSARY;
1839 }
1840 
ath10k_htt_rx_h_csum_offload(struct ath10k_hw_params * hw,struct sk_buff * msdu)1841 static void ath10k_htt_rx_h_csum_offload(struct ath10k_hw_params *hw,
1842 					 struct sk_buff *msdu)
1843 {
1844 	msdu->ip_summed = ath10k_htt_rx_get_csum_state(hw, msdu);
1845 }
1846 
ath10k_htt_rx_h_get_pn(struct ath10k * ar,struct sk_buff * skb,enum htt_rx_mpdu_encrypt_type enctype)1847 static u64 ath10k_htt_rx_h_get_pn(struct ath10k *ar, struct sk_buff *skb,
1848 				  enum htt_rx_mpdu_encrypt_type enctype)
1849 {
1850 	struct ieee80211_hdr *hdr;
1851 	u64 pn = 0;
1852 	u8 *ehdr;
1853 
1854 	hdr = (struct ieee80211_hdr *)skb->data;
1855 	ehdr = skb->data + ieee80211_hdrlen(hdr->frame_control);
1856 
1857 	if (enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2) {
1858 		pn = ehdr[0];
1859 		pn |= (u64)ehdr[1] << 8;
1860 		pn |= (u64)ehdr[4] << 16;
1861 		pn |= (u64)ehdr[5] << 24;
1862 		pn |= (u64)ehdr[6] << 32;
1863 		pn |= (u64)ehdr[7] << 40;
1864 	}
1865 	return pn;
1866 }
1867 
ath10k_htt_rx_h_frag_multicast_check(struct ath10k * ar,struct sk_buff * skb)1868 static bool ath10k_htt_rx_h_frag_multicast_check(struct ath10k *ar,
1869 						 struct sk_buff *skb)
1870 {
1871 	struct ieee80211_hdr *hdr;
1872 
1873 	hdr = (struct ieee80211_hdr *)skb->data;
1874 	return !is_multicast_ether_addr(hdr->addr1);
1875 }
1876 
ath10k_htt_rx_h_frag_pn_check(struct ath10k * ar,struct sk_buff * skb,u16 peer_id,enum htt_rx_mpdu_encrypt_type enctype)1877 static bool ath10k_htt_rx_h_frag_pn_check(struct ath10k *ar,
1878 					  struct sk_buff *skb,
1879 					  u16 peer_id,
1880 					  enum htt_rx_mpdu_encrypt_type enctype)
1881 {
1882 	struct ath10k_peer *peer;
1883 	union htt_rx_pn_t *last_pn, new_pn = {0};
1884 	struct ieee80211_hdr *hdr;
1885 	u8 tid, frag_number;
1886 	u32 seq;
1887 
1888 	peer = ath10k_peer_find_by_id(ar, peer_id);
1889 	if (!peer) {
1890 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer for frag pn check\n");
1891 		return false;
1892 	}
1893 
1894 	hdr = (struct ieee80211_hdr *)skb->data;
1895 	if (ieee80211_is_data_qos(hdr->frame_control))
1896 		tid = ieee80211_get_tid(hdr);
1897 	else
1898 		tid = ATH10K_TXRX_NON_QOS_TID;
1899 
1900 	last_pn = &peer->frag_tids_last_pn[tid];
1901 	new_pn.pn48 = ath10k_htt_rx_h_get_pn(ar, skb, enctype);
1902 	frag_number = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1903 	seq = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
1904 
1905 	if (frag_number == 0) {
1906 		last_pn->pn48 = new_pn.pn48;
1907 		peer->frag_tids_seq[tid] = seq;
1908 	} else {
1909 		if (seq != peer->frag_tids_seq[tid])
1910 			return false;
1911 
1912 		if (new_pn.pn48 != last_pn->pn48 + 1)
1913 			return false;
1914 
1915 		last_pn->pn48 = new_pn.pn48;
1916 	}
1917 
1918 	return true;
1919 }
1920 
ath10k_htt_rx_h_mpdu(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * status,bool fill_crypt_header,u8 * rx_hdr,enum ath10k_pkt_rx_err * err,u16 peer_id,bool frag)1921 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1922 				 struct sk_buff_head *amsdu,
1923 				 struct ieee80211_rx_status *status,
1924 				 bool fill_crypt_header,
1925 				 u8 *rx_hdr,
1926 				 enum ath10k_pkt_rx_err *err,
1927 				 u16 peer_id,
1928 				 bool frag)
1929 {
1930 	struct sk_buff *first;
1931 	struct sk_buff *last;
1932 	struct sk_buff *msdu, *temp;
1933 	struct ath10k_hw_params *hw = &ar->hw_params;
1934 	struct htt_rx_desc *rxd;
1935 	struct rx_attention *rxd_attention;
1936 	struct rx_mpdu_start *rxd_mpdu_start;
1937 
1938 	struct ieee80211_hdr *hdr;
1939 	enum htt_rx_mpdu_encrypt_type enctype;
1940 	u8 first_hdr[64];
1941 	u8 *qos;
1942 	bool has_fcs_err;
1943 	bool has_crypto_err;
1944 	bool has_tkip_err;
1945 	bool has_peer_idx_invalid;
1946 	bool is_decrypted;
1947 	bool is_mgmt;
1948 	u32 attention;
1949 	bool frag_pn_check = true, multicast_check = true;
1950 
1951 	if (skb_queue_empty(amsdu))
1952 		return;
1953 
1954 	first = skb_peek(amsdu);
1955 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1956 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
1957 
1958 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1959 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
1960 
1961 	is_mgmt = !!(rxd_attention->flags &
1962 		     __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1963 
1964 	enctype = MS(__le32_to_cpu(rxd_mpdu_start->info0),
1965 		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1966 
1967 	/* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1968 	 * decapped header. It'll be used for undecapping of each MSDU.
1969 	 */
1970 	hdr = (void *)ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
1971 	memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1972 
1973 	if (rx_hdr)
1974 		memcpy(rx_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1975 
1976 	/* Each A-MSDU subframe will use the original header as the base and be
1977 	 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1978 	 */
1979 	hdr = (void *)first_hdr;
1980 
1981 	if (ieee80211_is_data_qos(hdr->frame_control)) {
1982 		qos = ieee80211_get_qos_ctl(hdr);
1983 		qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1984 	}
1985 
1986 	/* Some attention flags are valid only in the last MSDU. */
1987 	last = skb_peek_tail(amsdu);
1988 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1989 				    (void *)last->data - hw->rx_desc_ops->rx_desc_size);
1990 
1991 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1992 	attention = __le32_to_cpu(rxd_attention->flags);
1993 
1994 	has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1995 	has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1996 	has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1997 	has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1998 
1999 	/* Note: If hardware captures an encrypted frame that it can't decrypt,
2000 	 * e.g. due to fcs error, missing peer or invalid key data it will
2001 	 * report the frame as raw.
2002 	 */
2003 	is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
2004 			!has_fcs_err &&
2005 			!has_crypto_err &&
2006 			!has_peer_idx_invalid);
2007 
2008 	/* Clear per-MPDU flags while leaving per-PPDU flags intact. */
2009 	status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
2010 			  RX_FLAG_MMIC_ERROR |
2011 			  RX_FLAG_DECRYPTED |
2012 			  RX_FLAG_IV_STRIPPED |
2013 			  RX_FLAG_ONLY_MONITOR |
2014 			  RX_FLAG_MMIC_STRIPPED);
2015 
2016 	if (has_fcs_err)
2017 		status->flag |= RX_FLAG_FAILED_FCS_CRC;
2018 
2019 	if (has_tkip_err)
2020 		status->flag |= RX_FLAG_MMIC_ERROR;
2021 
2022 	if (err) {
2023 		if (has_fcs_err)
2024 			*err = ATH10K_PKT_RX_ERR_FCS;
2025 		else if (has_tkip_err)
2026 			*err = ATH10K_PKT_RX_ERR_TKIP;
2027 		else if (has_crypto_err)
2028 			*err = ATH10K_PKT_RX_ERR_CRYPT;
2029 		else if (has_peer_idx_invalid)
2030 			*err = ATH10K_PKT_RX_ERR_PEER_IDX_INVAL;
2031 	}
2032 
2033 	/* Firmware reports all necessary management frames via WMI already.
2034 	 * They are not reported to monitor interfaces at all so pass the ones
2035 	 * coming via HTT to monitor interfaces instead. This simplifies
2036 	 * matters a lot.
2037 	 */
2038 	if (is_mgmt)
2039 		status->flag |= RX_FLAG_ONLY_MONITOR;
2040 
2041 	if (is_decrypted) {
2042 		status->flag |= RX_FLAG_DECRYPTED;
2043 
2044 		if (likely(!is_mgmt))
2045 			status->flag |= RX_FLAG_MMIC_STRIPPED;
2046 
2047 		if (fill_crypt_header)
2048 			status->flag |= RX_FLAG_MIC_STRIPPED |
2049 					RX_FLAG_ICV_STRIPPED;
2050 		else
2051 			status->flag |= RX_FLAG_IV_STRIPPED;
2052 	}
2053 
2054 	skb_queue_walk(amsdu, msdu) {
2055 		if (frag && !fill_crypt_header && is_decrypted &&
2056 		    enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2)
2057 			frag_pn_check = ath10k_htt_rx_h_frag_pn_check(ar,
2058 								      msdu,
2059 								      peer_id,
2060 								      enctype);
2061 
2062 		if (frag)
2063 			multicast_check = ath10k_htt_rx_h_frag_multicast_check(ar,
2064 									       msdu);
2065 
2066 		if (!frag_pn_check || !multicast_check) {
2067 			/* Discard the fragment with invalid PN or multicast DA
2068 			 */
2069 			temp = msdu->prev;
2070 			__skb_unlink(msdu, amsdu);
2071 			dev_kfree_skb_any(msdu);
2072 			msdu = temp;
2073 			frag_pn_check = true;
2074 			multicast_check = true;
2075 			continue;
2076 		}
2077 
2078 		ath10k_htt_rx_h_csum_offload(&ar->hw_params, msdu);
2079 
2080 		if (frag && !fill_crypt_header &&
2081 		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
2082 			status->flag &= ~RX_FLAG_MMIC_STRIPPED;
2083 
2084 		ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
2085 					is_decrypted);
2086 
2087 		/* Undecapping involves copying the original 802.11 header back
2088 		 * to sk_buff. If frame is protected and hardware has decrypted
2089 		 * it then remove the protected bit.
2090 		 */
2091 		if (!is_decrypted)
2092 			continue;
2093 		if (is_mgmt)
2094 			continue;
2095 
2096 		if (fill_crypt_header)
2097 			continue;
2098 
2099 		hdr = (void *)msdu->data;
2100 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2101 
2102 		if (frag && !fill_crypt_header &&
2103 		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
2104 			status->flag &= ~RX_FLAG_IV_STRIPPED &
2105 					~RX_FLAG_MMIC_STRIPPED;
2106 	}
2107 }
2108 
ath10k_htt_rx_h_enqueue(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * status)2109 static void ath10k_htt_rx_h_enqueue(struct ath10k *ar,
2110 				    struct sk_buff_head *amsdu,
2111 				    struct ieee80211_rx_status *status)
2112 {
2113 	struct sk_buff *msdu;
2114 	struct sk_buff *first_subframe;
2115 
2116 	first_subframe = skb_peek(amsdu);
2117 
2118 	while ((msdu = __skb_dequeue(amsdu))) {
2119 		/* Setup per-MSDU flags */
2120 		if (skb_queue_empty(amsdu))
2121 			status->flag &= ~RX_FLAG_AMSDU_MORE;
2122 		else
2123 			status->flag |= RX_FLAG_AMSDU_MORE;
2124 
2125 		if (msdu == first_subframe) {
2126 			first_subframe = NULL;
2127 			status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
2128 		} else {
2129 			status->flag |= RX_FLAG_ALLOW_SAME_PN;
2130 		}
2131 
2132 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
2133 	}
2134 }
2135 
ath10k_unchain_msdu(struct sk_buff_head * amsdu,unsigned long * unchain_cnt)2136 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu,
2137 			       unsigned long *unchain_cnt)
2138 {
2139 	struct sk_buff *skb, *first;
2140 	int space;
2141 	int total_len = 0;
2142 	int amsdu_len = skb_queue_len(amsdu);
2143 
2144 	/* TODO:  Might could optimize this by using
2145 	 * skb_try_coalesce or similar method to
2146 	 * decrease copying, or maybe get mac80211 to
2147 	 * provide a way to just receive a list of
2148 	 * skb?
2149 	 */
2150 
2151 	first = __skb_dequeue(amsdu);
2152 
2153 	/* Allocate total length all at once. */
2154 	skb_queue_walk(amsdu, skb)
2155 		total_len += skb->len;
2156 
2157 	space = total_len - skb_tailroom(first);
2158 	if ((space > 0) &&
2159 	    (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
2160 		/* TODO:  bump some rx-oom error stat */
2161 		/* put it back together so we can free the
2162 		 * whole list at once.
2163 		 */
2164 		__skb_queue_head(amsdu, first);
2165 		return -1;
2166 	}
2167 
2168 	/* Walk list again, copying contents into
2169 	 * msdu_head
2170 	 */
2171 	while ((skb = __skb_dequeue(amsdu))) {
2172 		skb_copy_from_linear_data(skb, skb_put(first, skb->len),
2173 					  skb->len);
2174 		dev_kfree_skb_any(skb);
2175 	}
2176 
2177 	__skb_queue_head(amsdu, first);
2178 
2179 	*unchain_cnt += amsdu_len - 1;
2180 
2181 	return 0;
2182 }
2183 
ath10k_htt_rx_h_unchain(struct ath10k * ar,struct sk_buff_head * amsdu,unsigned long * drop_cnt,unsigned long * unchain_cnt)2184 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
2185 				    struct sk_buff_head *amsdu,
2186 				    unsigned long *drop_cnt,
2187 				    unsigned long *unchain_cnt)
2188 {
2189 	struct sk_buff *first;
2190 	struct ath10k_hw_params *hw = &ar->hw_params;
2191 	struct htt_rx_desc *rxd;
2192 	struct rx_msdu_start_common *rxd_msdu_start_common;
2193 	struct rx_frag_info_common *rxd_frag_info;
2194 	enum rx_msdu_decap_format decap;
2195 
2196 	first = skb_peek(amsdu);
2197 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
2198 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
2199 
2200 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
2201 	rxd_frag_info = ath10k_htt_rx_desc_get_frag_info(hw, rxd);
2202 	decap = MS(__le32_to_cpu(rxd_msdu_start_common->info1),
2203 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
2204 
2205 	/* FIXME: Current unchaining logic can only handle simple case of raw
2206 	 * msdu chaining. If decapping is other than raw the chaining may be
2207 	 * more complex and this isn't handled by the current code. Don't even
2208 	 * try re-constructing such frames - it'll be pretty much garbage.
2209 	 */
2210 	if (decap != RX_MSDU_DECAP_RAW ||
2211 	    skb_queue_len(amsdu) != 1 + rxd_frag_info->ring2_more_count) {
2212 		*drop_cnt += skb_queue_len(amsdu);
2213 		__skb_queue_purge(amsdu);
2214 		return;
2215 	}
2216 
2217 	ath10k_unchain_msdu(amsdu, unchain_cnt);
2218 }
2219 
ath10k_htt_rx_validate_amsdu(struct ath10k * ar,struct sk_buff_head * amsdu)2220 static bool ath10k_htt_rx_validate_amsdu(struct ath10k *ar,
2221 					 struct sk_buff_head *amsdu)
2222 {
2223 	u8 *subframe_hdr;
2224 	struct sk_buff *first;
2225 	bool is_first, is_last;
2226 	struct ath10k_hw_params *hw = &ar->hw_params;
2227 	struct htt_rx_desc *rxd;
2228 	struct rx_msdu_end_common *rxd_msdu_end_common;
2229 	struct rx_mpdu_start *rxd_mpdu_start;
2230 	struct ieee80211_hdr *hdr;
2231 	size_t hdr_len, crypto_len;
2232 	enum htt_rx_mpdu_encrypt_type enctype;
2233 	int bytes_aligned = ar->hw_params.decap_align_bytes;
2234 
2235 	first = skb_peek(amsdu);
2236 
2237 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
2238 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
2239 
2240 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
2241 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
2242 	hdr = (void *)ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
2243 
2244 	is_first = !!(rxd_msdu_end_common->info0 &
2245 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
2246 	is_last = !!(rxd_msdu_end_common->info0 &
2247 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
2248 
2249 	/* Return in case of non-aggregated msdu */
2250 	if (is_first && is_last)
2251 		return true;
2252 
2253 	/* First msdu flag is not set for the first msdu of the list */
2254 	if (!is_first)
2255 		return false;
2256 
2257 	enctype = MS(__le32_to_cpu(rxd_mpdu_start->info0),
2258 		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);
2259 
2260 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
2261 	crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
2262 
2263 	subframe_hdr = (u8 *)hdr + round_up(hdr_len, bytes_aligned) +
2264 		       crypto_len;
2265 
2266 	/* Validate if the amsdu has a proper first subframe.
2267 	 * There are chances a single msdu can be received as amsdu when
2268 	 * the unauthenticated amsdu flag of a QoS header
2269 	 * gets flipped in non-SPP AMSDU's, in such cases the first
2270 	 * subframe has llc/snap header in place of a valid da.
2271 	 * return false if the da matches rfc1042 pattern
2272 	 */
2273 	if (ether_addr_equal(subframe_hdr, rfc1042_header))
2274 		return false;
2275 
2276 	return true;
2277 }
2278 
ath10k_htt_rx_amsdu_allowed(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * rx_status)2279 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
2280 					struct sk_buff_head *amsdu,
2281 					struct ieee80211_rx_status *rx_status)
2282 {
2283 	if (!rx_status->freq) {
2284 		ath10k_dbg(ar, ATH10K_DBG_HTT, "no channel configured; ignoring frame(s)!\n");
2285 		return false;
2286 	}
2287 
2288 	if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
2289 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
2290 		return false;
2291 	}
2292 
2293 	if (!ath10k_htt_rx_validate_amsdu(ar, amsdu)) {
2294 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid amsdu received\n");
2295 		return false;
2296 	}
2297 
2298 	return true;
2299 }
2300 
ath10k_htt_rx_h_filter(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * rx_status,unsigned long * drop_cnt)2301 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
2302 				   struct sk_buff_head *amsdu,
2303 				   struct ieee80211_rx_status *rx_status,
2304 				   unsigned long *drop_cnt)
2305 {
2306 	if (skb_queue_empty(amsdu))
2307 		return;
2308 
2309 	if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
2310 		return;
2311 
2312 	if (drop_cnt)
2313 		*drop_cnt += skb_queue_len(amsdu);
2314 
2315 	__skb_queue_purge(amsdu);
2316 }
2317 
ath10k_htt_rx_handle_amsdu(struct ath10k_htt * htt)2318 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
2319 {
2320 	struct ath10k *ar = htt->ar;
2321 	struct ieee80211_rx_status *rx_status = &htt->rx_status;
2322 	struct sk_buff_head amsdu;
2323 	int ret;
2324 	unsigned long drop_cnt = 0;
2325 	unsigned long unchain_cnt = 0;
2326 	unsigned long drop_cnt_filter = 0;
2327 	unsigned long msdus_to_queue, num_msdus;
2328 	enum ath10k_pkt_rx_err err = ATH10K_PKT_RX_ERR_MAX;
2329 	u8 first_hdr[RX_HTT_HDR_STATUS_LEN];
2330 
2331 	__skb_queue_head_init(&amsdu);
2332 
2333 	spin_lock_bh(&htt->rx_ring.lock);
2334 	if (htt->rx_confused) {
2335 		spin_unlock_bh(&htt->rx_ring.lock);
2336 		return -EIO;
2337 	}
2338 	ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
2339 	spin_unlock_bh(&htt->rx_ring.lock);
2340 
2341 	if (ret < 0) {
2342 		ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
2343 		__skb_queue_purge(&amsdu);
2344 		/* FIXME: It's probably a good idea to reboot the
2345 		 * device instead of leaving it inoperable.
2346 		 */
2347 		htt->rx_confused = true;
2348 		return ret;
2349 	}
2350 
2351 	num_msdus = skb_queue_len(&amsdu);
2352 
2353 	ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
2354 
2355 	/* only for ret = 1 indicates chained msdus */
2356 	if (ret > 0)
2357 		ath10k_htt_rx_h_unchain(ar, &amsdu, &drop_cnt, &unchain_cnt);
2358 
2359 	ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
2360 	ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err, 0,
2361 			     false);
2362 	msdus_to_queue = skb_queue_len(&amsdu);
2363 	ath10k_htt_rx_h_enqueue(ar, &amsdu, rx_status);
2364 
2365 	ath10k_sta_update_rx_tid_stats(ar, first_hdr, num_msdus, err,
2366 				       unchain_cnt, drop_cnt, drop_cnt_filter,
2367 				       msdus_to_queue);
2368 
2369 	return 0;
2370 }
2371 
ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc * rx_desc,union htt_rx_pn_t * pn,int pn_len_bits)2372 static void ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc *rx_desc,
2373 					  union htt_rx_pn_t *pn,
2374 					  int pn_len_bits)
2375 {
2376 	switch (pn_len_bits) {
2377 	case 48:
2378 		pn->pn48 = __le32_to_cpu(rx_desc->pn_31_0) +
2379 			   ((u64)(__le32_to_cpu(rx_desc->u0.pn_63_32) & 0xFFFF) << 32);
2380 		break;
2381 	case 24:
2382 		pn->pn24 = __le32_to_cpu(rx_desc->pn_31_0);
2383 		break;
2384 	}
2385 }
2386 
ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t * new_pn,union htt_rx_pn_t * old_pn)2387 static bool ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t *new_pn,
2388 				   union htt_rx_pn_t *old_pn)
2389 {
2390 	return ((new_pn->pn48 & 0xffffffffffffULL) <=
2391 		(old_pn->pn48 & 0xffffffffffffULL));
2392 }
2393 
ath10k_htt_rx_pn_check_replay_hl(struct ath10k * ar,struct ath10k_peer * peer,struct htt_rx_indication_hl * rx)2394 static bool ath10k_htt_rx_pn_check_replay_hl(struct ath10k *ar,
2395 					     struct ath10k_peer *peer,
2396 					     struct htt_rx_indication_hl *rx)
2397 {
2398 	bool last_pn_valid, pn_invalid = false;
2399 	enum htt_txrx_sec_cast_type sec_index;
2400 	enum htt_security_types sec_type;
2401 	union htt_rx_pn_t new_pn = {0};
2402 	struct htt_hl_rx_desc *rx_desc;
2403 	union htt_rx_pn_t *last_pn;
2404 	u32 rx_desc_info, tid;
2405 	int num_mpdu_ranges;
2406 
2407 	lockdep_assert_held(&ar->data_lock);
2408 
2409 	if (!peer)
2410 		return false;
2411 
2412 	if (!(rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU))
2413 		return false;
2414 
2415 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2416 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2417 
2418 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2419 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2420 
2421 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED))
2422 		return false;
2423 
2424 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2425 	last_pn_valid = peer->tids_last_pn_valid[tid];
2426 	last_pn = &peer->tids_last_pn[tid];
2427 
2428 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2429 		sec_index = HTT_TXRX_SEC_MCAST;
2430 	else
2431 		sec_index = HTT_TXRX_SEC_UCAST;
2432 
2433 	sec_type = peer->rx_pn[sec_index].sec_type;
2434 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2435 
2436 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2437 	    sec_type != HTT_SECURITY_TKIP &&
2438 	    sec_type != HTT_SECURITY_TKIP_NOMIC)
2439 		return false;
2440 
2441 	if (last_pn_valid)
2442 		pn_invalid = ath10k_htt_rx_pn_cmp48(&new_pn, last_pn);
2443 	else
2444 		peer->tids_last_pn_valid[tid] = true;
2445 
2446 	if (!pn_invalid)
2447 		last_pn->pn48 = new_pn.pn48;
2448 
2449 	return pn_invalid;
2450 }
2451 
ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt * htt,struct htt_rx_indication_hl * rx,struct sk_buff * skb,enum htt_rx_pn_check_type check_pn_type,enum htt_rx_tkip_demic_type tkip_mic_type)2452 static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
2453 					 struct htt_rx_indication_hl *rx,
2454 					 struct sk_buff *skb,
2455 					 enum htt_rx_pn_check_type check_pn_type,
2456 					 enum htt_rx_tkip_demic_type tkip_mic_type)
2457 {
2458 	struct ath10k *ar = htt->ar;
2459 	struct ath10k_peer *peer;
2460 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2461 	struct fw_rx_desc_hl *fw_desc;
2462 	enum htt_txrx_sec_cast_type sec_index;
2463 	enum htt_security_types sec_type;
2464 	union htt_rx_pn_t new_pn = {0};
2465 	struct htt_hl_rx_desc *rx_desc;
2466 	struct ieee80211_hdr *hdr;
2467 	struct ieee80211_rx_status *rx_status;
2468 	u16 peer_id;
2469 	u8 rx_desc_len;
2470 	int num_mpdu_ranges;
2471 	size_t tot_hdr_len;
2472 	struct ieee80211_channel *ch;
2473 	bool pn_invalid, qos, first_msdu;
2474 	u32 tid, rx_desc_info;
2475 
2476 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2477 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2478 
2479 	spin_lock_bh(&ar->data_lock);
2480 	peer = ath10k_peer_find_by_id(ar, peer_id);
2481 	spin_unlock_bh(&ar->data_lock);
2482 	if (!peer && peer_id != HTT_INVALID_PEERID)
2483 		ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
2484 
2485 	if (!peer)
2486 		return true;
2487 
2488 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2489 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2490 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges_hl(rx);
2491 	fw_desc = &rx->fw_desc;
2492 	rx_desc_len = fw_desc->len;
2493 
2494 	if (fw_desc->u.bits.discard) {
2495 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt discard mpdu\n");
2496 		goto err;
2497 	}
2498 
2499 	/* I have not yet seen any case where num_mpdu_ranges > 1.
2500 	 * qcacld does not seem handle that case either, so we introduce the
2501 	 * same limitation here as well.
2502 	 */
2503 	if (num_mpdu_ranges > 1)
2504 		ath10k_warn(ar,
2505 			    "Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
2506 			    num_mpdu_ranges);
2507 
2508 	if (mpdu_ranges->mpdu_range_status !=
2509 	    HTT_RX_IND_MPDU_STATUS_OK &&
2510 	    mpdu_ranges->mpdu_range_status !=
2511 	    HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) {
2512 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt mpdu_range_status %d\n",
2513 			   mpdu_ranges->mpdu_range_status);
2514 		goto err;
2515 	}
2516 
2517 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2518 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2519 
2520 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2521 		sec_index = HTT_TXRX_SEC_MCAST;
2522 	else
2523 		sec_index = HTT_TXRX_SEC_UCAST;
2524 
2525 	sec_type = peer->rx_pn[sec_index].sec_type;
2526 	first_msdu = rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU;
2527 
2528 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2529 
2530 	if (check_pn_type == HTT_RX_PN_CHECK && tid >= IEEE80211_NUM_TIDS) {
2531 		spin_lock_bh(&ar->data_lock);
2532 		pn_invalid = ath10k_htt_rx_pn_check_replay_hl(ar, peer, rx);
2533 		spin_unlock_bh(&ar->data_lock);
2534 
2535 		if (pn_invalid)
2536 			goto err;
2537 	}
2538 
2539 	/* Strip off all headers before the MAC header before delivery to
2540 	 * mac80211
2541 	 */
2542 	tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
2543 		      sizeof(rx->ppdu) + sizeof(rx->prefix) +
2544 		      sizeof(rx->fw_desc) +
2545 		      sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
2546 
2547 	skb_pull(skb, tot_hdr_len);
2548 
2549 	hdr = (struct ieee80211_hdr *)skb->data;
2550 	qos = ieee80211_is_data_qos(hdr->frame_control);
2551 
2552 	rx_status = IEEE80211_SKB_RXCB(skb);
2553 	memset(rx_status, 0, sizeof(*rx_status));
2554 
2555 	if (rx->ppdu.combined_rssi == 0) {
2556 		/* SDIO firmware does not provide signal */
2557 		rx_status->signal = 0;
2558 		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2559 	} else {
2560 		rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
2561 			rx->ppdu.combined_rssi;
2562 		rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
2563 	}
2564 
2565 	spin_lock_bh(&ar->data_lock);
2566 	ch = ar->scan_channel;
2567 	if (!ch)
2568 		ch = ar->rx_channel;
2569 	if (!ch)
2570 		ch = ath10k_htt_rx_h_any_channel(ar);
2571 	if (!ch)
2572 		ch = ar->tgt_oper_chan;
2573 	spin_unlock_bh(&ar->data_lock);
2574 
2575 	if (ch) {
2576 		rx_status->band = ch->band;
2577 		rx_status->freq = ch->center_freq;
2578 	}
2579 	if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
2580 		rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
2581 	else
2582 		rx_status->flag |= RX_FLAG_AMSDU_MORE;
2583 
2584 	/* Not entirely sure about this, but all frames from the chipset has
2585 	 * the protected flag set even though they have already been decrypted.
2586 	 * Unmasking this flag is necessary in order for mac80211 not to drop
2587 	 * the frame.
2588 	 * TODO: Verify this is always the case or find out a way to check
2589 	 * if there has been hw decryption.
2590 	 */
2591 	if (ieee80211_has_protected(hdr->frame_control)) {
2592 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2593 		rx_status->flag |= RX_FLAG_DECRYPTED |
2594 				   RX_FLAG_IV_STRIPPED |
2595 				   RX_FLAG_MMIC_STRIPPED;
2596 
2597 		if (tid < IEEE80211_NUM_TIDS &&
2598 		    first_msdu &&
2599 		    check_pn_type == HTT_RX_PN_CHECK &&
2600 		   (sec_type == HTT_SECURITY_AES_CCMP ||
2601 		    sec_type == HTT_SECURITY_TKIP ||
2602 		    sec_type == HTT_SECURITY_TKIP_NOMIC)) {
2603 			u8 offset, *ivp, i;
2604 			s8 keyidx = 0;
2605 			__le64 pn48 = cpu_to_le64(new_pn.pn48);
2606 
2607 			hdr = (struct ieee80211_hdr *)skb->data;
2608 			offset = ieee80211_hdrlen(hdr->frame_control);
2609 			hdr->frame_control |= __cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2610 			rx_status->flag &= ~RX_FLAG_IV_STRIPPED;
2611 
2612 			memmove(skb->data - IEEE80211_CCMP_HDR_LEN,
2613 				skb->data, offset);
2614 			skb_push(skb, IEEE80211_CCMP_HDR_LEN);
2615 			ivp = skb->data + offset;
2616 			memset(skb->data + offset, 0, IEEE80211_CCMP_HDR_LEN);
2617 			/* Ext IV */
2618 			ivp[IEEE80211_WEP_IV_LEN - 1] |= ATH10K_IEEE80211_EXTIV;
2619 
2620 			for (i = 0; i < ARRAY_SIZE(peer->keys); i++) {
2621 				if (peer->keys[i] &&
2622 				    peer->keys[i]->flags & IEEE80211_KEY_FLAG_PAIRWISE)
2623 					keyidx = peer->keys[i]->keyidx;
2624 			}
2625 
2626 			/* Key ID */
2627 			ivp[IEEE80211_WEP_IV_LEN - 1] |= keyidx << 6;
2628 
2629 			if (sec_type == HTT_SECURITY_AES_CCMP) {
2630 				rx_status->flag |= RX_FLAG_MIC_STRIPPED;
2631 				/* pn 0, pn 1 */
2632 				memcpy(skb->data + offset, &pn48, 2);
2633 				/* pn 1, pn 3 , pn 34 , pn 5 */
2634 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2635 			} else {
2636 				rx_status->flag |= RX_FLAG_ICV_STRIPPED;
2637 				/* TSC 0 */
2638 				memcpy(skb->data + offset + 2, &pn48, 1);
2639 				/* TSC 1 */
2640 				memcpy(skb->data + offset, ((u8 *)&pn48) + 1, 1);
2641 				/* TSC 2 , TSC 3 , TSC 4 , TSC 5*/
2642 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2643 			}
2644 		}
2645 	}
2646 
2647 	if (tkip_mic_type == HTT_RX_TKIP_MIC)
2648 		rx_status->flag &= ~RX_FLAG_IV_STRIPPED &
2649 				   ~RX_FLAG_MMIC_STRIPPED;
2650 
2651 	if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
2652 		rx_status->flag |= RX_FLAG_MMIC_ERROR;
2653 
2654 	if (!qos && tid < IEEE80211_NUM_TIDS) {
2655 		u8 offset;
2656 		__le16 qos_ctrl = 0;
2657 
2658 		hdr = (struct ieee80211_hdr *)skb->data;
2659 		offset = ieee80211_hdrlen(hdr->frame_control);
2660 
2661 		hdr->frame_control |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2662 		memmove(skb->data - IEEE80211_QOS_CTL_LEN, skb->data, offset);
2663 		skb_push(skb, IEEE80211_QOS_CTL_LEN);
2664 		qos_ctrl = cpu_to_le16(tid);
2665 		memcpy(skb->data + offset, &qos_ctrl, IEEE80211_QOS_CTL_LEN);
2666 	}
2667 
2668 	if (ar->napi.dev)
2669 		ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
2670 	else
2671 		ieee80211_rx_ni(ar->hw, skb);
2672 
2673 	/* We have delivered the skb to the upper layers (mac80211) so we
2674 	 * must not free it.
2675 	 */
2676 	return false;
2677 err:
2678 	/* Tell the caller that it must free the skb since we have not
2679 	 * consumed it
2680 	 */
2681 	return true;
2682 }
2683 
ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff * skb,u16 head_len,u16 hdr_len)2684 static int ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff *skb,
2685 					       u16 head_len,
2686 					       u16 hdr_len)
2687 {
2688 	u8 *ivp, *orig_hdr;
2689 
2690 	orig_hdr = skb->data;
2691 	ivp = orig_hdr + hdr_len + head_len;
2692 
2693 	/* the ExtIV bit is always set to 1 for TKIP */
2694 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2695 		return -EINVAL;
2696 
2697 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2698 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2699 	skb_trim(skb, skb->len - ATH10K_IEEE80211_TKIP_MICLEN);
2700 	return 0;
2701 }
2702 
ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff * skb,u16 head_len,u16 hdr_len)2703 static int ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff *skb,
2704 						 u16 head_len,
2705 						 u16 hdr_len)
2706 {
2707 	u8 *ivp, *orig_hdr;
2708 
2709 	orig_hdr = skb->data;
2710 	ivp = orig_hdr + hdr_len + head_len;
2711 
2712 	/* the ExtIV bit is always set to 1 for TKIP */
2713 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2714 		return -EINVAL;
2715 
2716 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2717 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2718 	skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
2719 	return 0;
2720 }
2721 
ath10k_htt_rx_frag_ccmp_decap(struct sk_buff * skb,u16 head_len,u16 hdr_len)2722 static int ath10k_htt_rx_frag_ccmp_decap(struct sk_buff *skb,
2723 					 u16 head_len,
2724 					 u16 hdr_len)
2725 {
2726 	u8 *ivp, *orig_hdr;
2727 
2728 	orig_hdr = skb->data;
2729 	ivp = orig_hdr + hdr_len + head_len;
2730 
2731 	/* the ExtIV bit is always set to 1 for CCMP */
2732 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2733 		return -EINVAL;
2734 
2735 	skb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN);
2736 	memmove(orig_hdr + IEEE80211_CCMP_HDR_LEN, orig_hdr, head_len + hdr_len);
2737 	skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
2738 	return 0;
2739 }
2740 
ath10k_htt_rx_frag_wep_decap(struct sk_buff * skb,u16 head_len,u16 hdr_len)2741 static int ath10k_htt_rx_frag_wep_decap(struct sk_buff *skb,
2742 					u16 head_len,
2743 					u16 hdr_len)
2744 {
2745 	u8 *orig_hdr;
2746 
2747 	orig_hdr = skb->data;
2748 
2749 	memmove(orig_hdr + IEEE80211_WEP_IV_LEN,
2750 		orig_hdr, head_len + hdr_len);
2751 	skb_pull(skb, IEEE80211_WEP_IV_LEN);
2752 	skb_trim(skb, skb->len - IEEE80211_WEP_ICV_LEN);
2753 	return 0;
2754 }
2755 
ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt * htt,struct htt_rx_fragment_indication * rx,struct sk_buff * skb)2756 static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
2757 					      struct htt_rx_fragment_indication *rx,
2758 					      struct sk_buff *skb)
2759 {
2760 	struct ath10k *ar = htt->ar;
2761 	enum htt_rx_tkip_demic_type tkip_mic = HTT_RX_NON_TKIP_MIC;
2762 	enum htt_txrx_sec_cast_type sec_index;
2763 	struct htt_rx_indication_hl *rx_hl;
2764 	enum htt_security_types sec_type;
2765 	u32 tid, frag, seq, rx_desc_info;
2766 	union htt_rx_pn_t new_pn = {0};
2767 	struct htt_hl_rx_desc *rx_desc;
2768 	u16 peer_id, sc, hdr_space;
2769 	union htt_rx_pn_t *last_pn;
2770 	struct ieee80211_hdr *hdr;
2771 	int ret, num_mpdu_ranges;
2772 	struct ath10k_peer *peer;
2773 	struct htt_resp *resp;
2774 	size_t tot_hdr_len;
2775 
2776 	resp = (struct htt_resp *)(skb->data + HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2777 	skb_pull(skb, HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2778 	skb_trim(skb, skb->len - FCS_LEN);
2779 
2780 	peer_id = __le16_to_cpu(rx->peer_id);
2781 	rx_hl = (struct htt_rx_indication_hl *)(&resp->rx_ind_hl);
2782 
2783 	spin_lock_bh(&ar->data_lock);
2784 	peer = ath10k_peer_find_by_id(ar, peer_id);
2785 	if (!peer) {
2786 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer: %u\n", peer_id);
2787 		goto err;
2788 	}
2789 
2790 	num_mpdu_ranges = MS(__le32_to_cpu(rx_hl->hdr.info1),
2791 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2792 
2793 	tot_hdr_len = sizeof(struct htt_resp_hdr) +
2794 		      sizeof(rx_hl->hdr) +
2795 		      sizeof(rx_hl->ppdu) +
2796 		      sizeof(rx_hl->prefix) +
2797 		      sizeof(rx_hl->fw_desc) +
2798 		      sizeof(struct htt_rx_indication_mpdu_range) * num_mpdu_ranges;
2799 
2800 	tid =  MS(rx_hl->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2801 	rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
2802 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2803 
2804 	hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
2805 
2806 	if (is_multicast_ether_addr(hdr->addr1)) {
2807 		/* Discard the fragment with multicast DA */
2808 		goto err;
2809 	}
2810 
2811 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
2812 		spin_unlock_bh(&ar->data_lock);
2813 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2814 						    HTT_RX_NON_PN_CHECK,
2815 						    HTT_RX_NON_TKIP_MIC);
2816 	}
2817 
2818 	if (ieee80211_has_retry(hdr->frame_control))
2819 		goto err;
2820 
2821 	hdr_space = ieee80211_hdrlen(hdr->frame_control);
2822 	sc = __le16_to_cpu(hdr->seq_ctrl);
2823 	seq = IEEE80211_SEQ_TO_SN(sc);
2824 	frag = sc & IEEE80211_SCTL_FRAG;
2825 
2826 	sec_index = MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST) ?
2827 		    HTT_TXRX_SEC_MCAST : HTT_TXRX_SEC_UCAST;
2828 	sec_type = peer->rx_pn[sec_index].sec_type;
2829 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2830 
2831 	switch (sec_type) {
2832 	case HTT_SECURITY_TKIP:
2833 		tkip_mic = HTT_RX_TKIP_MIC;
2834 		ret = ath10k_htt_rx_frag_tkip_decap_withmic(skb,
2835 							    tot_hdr_len +
2836 							    rx_hl->fw_desc.len,
2837 							    hdr_space);
2838 		if (ret)
2839 			goto err;
2840 		break;
2841 	case HTT_SECURITY_TKIP_NOMIC:
2842 		ret = ath10k_htt_rx_frag_tkip_decap_nomic(skb,
2843 							  tot_hdr_len +
2844 							  rx_hl->fw_desc.len,
2845 							  hdr_space);
2846 		if (ret)
2847 			goto err;
2848 		break;
2849 	case HTT_SECURITY_AES_CCMP:
2850 		ret = ath10k_htt_rx_frag_ccmp_decap(skb,
2851 						    tot_hdr_len + rx_hl->fw_desc.len,
2852 						    hdr_space);
2853 		if (ret)
2854 			goto err;
2855 		break;
2856 	case HTT_SECURITY_WEP128:
2857 	case HTT_SECURITY_WEP104:
2858 	case HTT_SECURITY_WEP40:
2859 		ret = ath10k_htt_rx_frag_wep_decap(skb,
2860 						   tot_hdr_len + rx_hl->fw_desc.len,
2861 						   hdr_space);
2862 		if (ret)
2863 			goto err;
2864 		break;
2865 	default:
2866 		break;
2867 	}
2868 
2869 	resp = (struct htt_resp *)(skb->data);
2870 
2871 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2872 	    sec_type != HTT_SECURITY_TKIP &&
2873 	    sec_type != HTT_SECURITY_TKIP_NOMIC) {
2874 		spin_unlock_bh(&ar->data_lock);
2875 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2876 						    HTT_RX_NON_PN_CHECK,
2877 						    HTT_RX_NON_TKIP_MIC);
2878 	}
2879 
2880 	last_pn = &peer->frag_tids_last_pn[tid];
2881 
2882 	if (frag == 0) {
2883 		if (ath10k_htt_rx_pn_check_replay_hl(ar, peer, &resp->rx_ind_hl))
2884 			goto err;
2885 
2886 		last_pn->pn48 = new_pn.pn48;
2887 		peer->frag_tids_seq[tid] = seq;
2888 	} else if (sec_type == HTT_SECURITY_AES_CCMP) {
2889 		if (seq != peer->frag_tids_seq[tid])
2890 			goto err;
2891 
2892 		if (new_pn.pn48 != last_pn->pn48 + 1)
2893 			goto err;
2894 
2895 		last_pn->pn48 = new_pn.pn48;
2896 		last_pn = &peer->tids_last_pn[tid];
2897 		last_pn->pn48 = new_pn.pn48;
2898 	}
2899 
2900 	spin_unlock_bh(&ar->data_lock);
2901 
2902 	return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2903 					    HTT_RX_NON_PN_CHECK, tkip_mic);
2904 
2905 err:
2906 	spin_unlock_bh(&ar->data_lock);
2907 
2908 	/* Tell the caller that it must free the skb since we have not
2909 	 * consumed it
2910 	 */
2911 	return true;
2912 }
2913 
ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt * htt,struct htt_rx_indication * rx)2914 static void ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt *htt,
2915 					 struct htt_rx_indication *rx)
2916 {
2917 	struct ath10k *ar = htt->ar;
2918 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2919 	int num_mpdu_ranges;
2920 	int i, mpdu_count = 0;
2921 	u16 peer_id;
2922 	u8 tid;
2923 
2924 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2925 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2926 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2927 	tid =  MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2928 
2929 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
2930 
2931 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
2932 			rx, struct_size(rx, mpdu_ranges, num_mpdu_ranges));
2933 
2934 	for (i = 0; i < num_mpdu_ranges; i++)
2935 		mpdu_count += mpdu_ranges[i].mpdu_count;
2936 
2937 	atomic_add(mpdu_count, &htt->num_mpdus_ready);
2938 
2939 	ath10k_sta_update_rx_tid_stats_ampdu(ar, peer_id, tid, mpdu_ranges,
2940 					     num_mpdu_ranges);
2941 }
2942 
ath10k_htt_rx_tx_compl_ind(struct ath10k * ar,struct sk_buff * skb)2943 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
2944 				       struct sk_buff *skb)
2945 {
2946 	struct ath10k_htt *htt = &ar->htt;
2947 	struct htt_resp *resp = (struct htt_resp *)skb->data;
2948 	struct htt_tx_done tx_done = {};
2949 	int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
2950 	__le16 msdu_id, *msdus;
2951 	bool rssi_enabled = false;
2952 	u8 msdu_count = 0, num_airtime_records, tid;
2953 	int i, htt_pad = 0;
2954 	struct htt_data_tx_compl_ppdu_dur *ppdu_info;
2955 	struct ath10k_peer *peer;
2956 	u16 ppdu_info_offset = 0, peer_id;
2957 	u32 tx_duration;
2958 
2959 	switch (status) {
2960 	case HTT_DATA_TX_STATUS_NO_ACK:
2961 		tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2962 		break;
2963 	case HTT_DATA_TX_STATUS_OK:
2964 		tx_done.status = HTT_TX_COMPL_STATE_ACK;
2965 		break;
2966 	case HTT_DATA_TX_STATUS_DISCARD:
2967 	case HTT_DATA_TX_STATUS_POSTPONE:
2968 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2969 		break;
2970 	default:
2971 		ath10k_warn(ar, "unhandled tx completion status %d\n", status);
2972 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2973 		break;
2974 	}
2975 
2976 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
2977 		   resp->data_tx_completion.num_msdus);
2978 
2979 	msdu_count = resp->data_tx_completion.num_msdus;
2980 	msdus = resp->data_tx_completion.msdus;
2981 	rssi_enabled = ath10k_is_rssi_enable(&ar->hw_params, resp);
2982 
2983 	if (rssi_enabled)
2984 		htt_pad = ath10k_tx_data_rssi_get_pad_bytes(&ar->hw_params,
2985 							    resp);
2986 
2987 	for (i = 0; i < msdu_count; i++) {
2988 		msdu_id = msdus[i];
2989 		tx_done.msdu_id = __le16_to_cpu(msdu_id);
2990 
2991 		if (rssi_enabled) {
2992 			/* Total no of MSDUs should be even,
2993 			 * if odd MSDUs are sent firmware fills
2994 			 * last msdu id with 0xffff
2995 			 */
2996 			if (msdu_count & 0x01) {
2997 				msdu_id = msdus[msdu_count +  i + 1 + htt_pad];
2998 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2999 			} else {
3000 				msdu_id = msdus[msdu_count +  i + htt_pad];
3001 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
3002 			}
3003 		}
3004 
3005 		/* kfifo_put: In practice firmware shouldn't fire off per-CE
3006 		 * interrupt and main interrupt (MSI/-X range case) for the same
3007 		 * HTC service so it should be safe to use kfifo_put w/o lock.
3008 		 *
3009 		 * From kfifo_put() documentation:
3010 		 *  Note that with only one concurrent reader and one concurrent
3011 		 *  writer, you don't need extra locking to use these macro.
3012 		 */
3013 		if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
3014 			ath10k_txrx_tx_unref(htt, &tx_done);
3015 		} else if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
3016 			ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
3017 				    tx_done.msdu_id, tx_done.status);
3018 			ath10k_txrx_tx_unref(htt, &tx_done);
3019 		}
3020 	}
3021 
3022 	if (!(resp->data_tx_completion.flags2 & HTT_TX_CMPL_FLAG_PPDU_DURATION_PRESENT))
3023 		return;
3024 
3025 	ppdu_info_offset = (msdu_count & 0x01) ? msdu_count + 1 : msdu_count;
3026 
3027 	if (rssi_enabled)
3028 		ppdu_info_offset += ppdu_info_offset;
3029 
3030 	if (resp->data_tx_completion.flags2 &
3031 	    (HTT_TX_CMPL_FLAG_PPID_PRESENT | HTT_TX_CMPL_FLAG_PA_PRESENT))
3032 		ppdu_info_offset += 2;
3033 
3034 	ppdu_info = (struct htt_data_tx_compl_ppdu_dur *)&msdus[ppdu_info_offset];
3035 	num_airtime_records = FIELD_GET(HTT_TX_COMPL_PPDU_DUR_INFO0_NUM_ENTRIES_MASK,
3036 					__le32_to_cpu(ppdu_info->info0));
3037 
3038 	for (i = 0; i < num_airtime_records; i++) {
3039 		struct htt_data_tx_ppdu_dur *ppdu_dur;
3040 		u32 info0;
3041 
3042 		ppdu_dur = &ppdu_info->ppdu_dur[i];
3043 		info0 = __le32_to_cpu(ppdu_dur->info0);
3044 
3045 		peer_id = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_PEER_ID_MASK,
3046 				    info0);
3047 		rcu_read_lock();
3048 		spin_lock_bh(&ar->data_lock);
3049 
3050 		peer = ath10k_peer_find_by_id(ar, peer_id);
3051 		if (!peer || !peer->sta) {
3052 			spin_unlock_bh(&ar->data_lock);
3053 			rcu_read_unlock();
3054 			continue;
3055 		}
3056 
3057 		tid = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_TID_MASK, info0) &
3058 						IEEE80211_QOS_CTL_TID_MASK;
3059 		tx_duration = __le32_to_cpu(ppdu_dur->tx_duration);
3060 
3061 		ieee80211_sta_register_airtime(peer->sta, tid, tx_duration, 0);
3062 
3063 		spin_unlock_bh(&ar->data_lock);
3064 		rcu_read_unlock();
3065 	}
3066 }
3067 
ath10k_htt_rx_addba(struct ath10k * ar,struct htt_resp * resp)3068 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
3069 {
3070 	struct htt_rx_addba *ev = &resp->rx_addba;
3071 	struct ath10k_peer *peer;
3072 	struct ath10k_vif *arvif;
3073 	u16 info0, tid, peer_id;
3074 
3075 	info0 = __le16_to_cpu(ev->info0);
3076 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
3077 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
3078 
3079 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3080 		   "htt rx addba tid %u peer_id %u size %u\n",
3081 		   tid, peer_id, ev->window_size);
3082 
3083 	spin_lock_bh(&ar->data_lock);
3084 	peer = ath10k_peer_find_by_id(ar, peer_id);
3085 	if (!peer) {
3086 		ath10k_warn(ar, "received addba event for invalid peer_id: %u\n",
3087 			    peer_id);
3088 		spin_unlock_bh(&ar->data_lock);
3089 		return;
3090 	}
3091 
3092 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
3093 	if (!arvif) {
3094 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
3095 			    peer->vdev_id);
3096 		spin_unlock_bh(&ar->data_lock);
3097 		return;
3098 	}
3099 
3100 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3101 		   "htt rx start rx ba session sta %pM tid %u size %u\n",
3102 		   peer->addr, tid, ev->window_size);
3103 
3104 	ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
3105 	spin_unlock_bh(&ar->data_lock);
3106 }
3107 
ath10k_htt_rx_delba(struct ath10k * ar,struct htt_resp * resp)3108 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
3109 {
3110 	struct htt_rx_delba *ev = &resp->rx_delba;
3111 	struct ath10k_peer *peer;
3112 	struct ath10k_vif *arvif;
3113 	u16 info0, tid, peer_id;
3114 
3115 	info0 = __le16_to_cpu(ev->info0);
3116 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
3117 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
3118 
3119 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3120 		   "htt rx delba tid %u peer_id %u\n",
3121 		   tid, peer_id);
3122 
3123 	spin_lock_bh(&ar->data_lock);
3124 	peer = ath10k_peer_find_by_id(ar, peer_id);
3125 	if (!peer) {
3126 		ath10k_warn(ar, "received addba event for invalid peer_id: %u\n",
3127 			    peer_id);
3128 		spin_unlock_bh(&ar->data_lock);
3129 		return;
3130 	}
3131 
3132 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
3133 	if (!arvif) {
3134 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
3135 			    peer->vdev_id);
3136 		spin_unlock_bh(&ar->data_lock);
3137 		return;
3138 	}
3139 
3140 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3141 		   "htt rx stop rx ba session sta %pM tid %u\n",
3142 		   peer->addr, tid);
3143 
3144 	ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
3145 	spin_unlock_bh(&ar->data_lock);
3146 }
3147 
ath10k_htt_rx_extract_amsdu(struct ath10k_hw_params * hw,struct sk_buff_head * list,struct sk_buff_head * amsdu)3148 static int ath10k_htt_rx_extract_amsdu(struct ath10k_hw_params *hw,
3149 				       struct sk_buff_head *list,
3150 				       struct sk_buff_head *amsdu)
3151 {
3152 	struct sk_buff *msdu;
3153 	struct htt_rx_desc *rxd;
3154 	struct rx_msdu_end_common *rxd_msdu_end_common;
3155 
3156 	if (skb_queue_empty(list))
3157 		return -ENOBUFS;
3158 
3159 	if (WARN_ON(!skb_queue_empty(amsdu)))
3160 		return -EINVAL;
3161 
3162 	while ((msdu = __skb_dequeue(list))) {
3163 		__skb_queue_tail(amsdu, msdu);
3164 
3165 		rxd = HTT_RX_BUF_TO_RX_DESC(hw,
3166 					    (void *)msdu->data -
3167 					    hw->rx_desc_ops->rx_desc_size);
3168 
3169 		rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
3170 		if (rxd_msdu_end_common->info0 &
3171 		    __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
3172 			break;
3173 	}
3174 
3175 	msdu = skb_peek_tail(amsdu);
3176 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
3177 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
3178 
3179 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
3180 	if (!(rxd_msdu_end_common->info0 &
3181 	      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
3182 		skb_queue_splice_init(amsdu, list);
3183 		return -EAGAIN;
3184 	}
3185 
3186 	return 0;
3187 }
3188 
ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status * status,struct sk_buff * skb)3189 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
3190 					    struct sk_buff *skb)
3191 {
3192 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
3193 
3194 	if (!ieee80211_has_protected(hdr->frame_control))
3195 		return;
3196 
3197 	/* Offloaded frames are already decrypted but firmware insists they are
3198 	 * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
3199 	 * will drop the frame.
3200 	 */
3201 
3202 	hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3203 	status->flag |= RX_FLAG_DECRYPTED |
3204 			RX_FLAG_IV_STRIPPED |
3205 			RX_FLAG_MMIC_STRIPPED;
3206 }
3207 
ath10k_htt_rx_h_rx_offload(struct ath10k * ar,struct sk_buff_head * list)3208 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
3209 				       struct sk_buff_head *list)
3210 {
3211 	struct ath10k_htt *htt = &ar->htt;
3212 	struct ieee80211_rx_status *status = &htt->rx_status;
3213 	struct htt_rx_offload_msdu *rx;
3214 	struct sk_buff *msdu;
3215 	size_t offset;
3216 
3217 	while ((msdu = __skb_dequeue(list))) {
3218 		/* Offloaded frames don't have Rx descriptor. Instead they have
3219 		 * a short meta information header.
3220 		 */
3221 
3222 		rx = (void *)msdu->data;
3223 
3224 		skb_put(msdu, sizeof(*rx));
3225 		skb_pull(msdu, sizeof(*rx));
3226 
3227 		if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
3228 			ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
3229 			dev_kfree_skb_any(msdu);
3230 			continue;
3231 		}
3232 
3233 		skb_put(msdu, __le16_to_cpu(rx->msdu_len));
3234 
3235 		/* Offloaded rx header length isn't multiple of 2 nor 4 so the
3236 		 * actual payload is unaligned. Align the frame.  Otherwise
3237 		 * mac80211 complains.  This shouldn't reduce performance much
3238 		 * because these offloaded frames are rare.
3239 		 */
3240 		offset = 4 - ((unsigned long)msdu->data & 3);
3241 		skb_put(msdu, offset);
3242 		memmove(msdu->data + offset, msdu->data, msdu->len);
3243 		skb_pull(msdu, offset);
3244 
3245 		/* FIXME: The frame is NWifi. Re-construct QoS Control
3246 		 * if possible later.
3247 		 */
3248 
3249 		memset(status, 0, sizeof(*status));
3250 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
3251 
3252 		ath10k_htt_rx_h_rx_offload_prot(status, msdu);
3253 		ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
3254 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
3255 	}
3256 }
3257 
ath10k_htt_rx_in_ord_ind(struct ath10k * ar,struct sk_buff * skb)3258 static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
3259 {
3260 	struct ath10k_htt *htt = &ar->htt;
3261 	struct htt_resp *resp = (void *)skb->data;
3262 	struct ieee80211_rx_status *status = &htt->rx_status;
3263 	struct sk_buff_head list;
3264 	struct sk_buff_head amsdu;
3265 	u16 peer_id;
3266 	u16 msdu_count;
3267 	u8 vdev_id;
3268 	u8 tid;
3269 	bool offload;
3270 	bool frag;
3271 	int ret;
3272 
3273 	lockdep_assert_held(&htt->rx_ring.lock);
3274 
3275 	if (htt->rx_confused)
3276 		return -EIO;
3277 
3278 	skb_pull(skb, sizeof(resp->hdr));
3279 	skb_pull(skb, sizeof(resp->rx_in_ord_ind));
3280 
3281 	peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
3282 	msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
3283 	vdev_id = resp->rx_in_ord_ind.vdev_id;
3284 	tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
3285 	offload = !!(resp->rx_in_ord_ind.info &
3286 			HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
3287 	frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
3288 
3289 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3290 		   "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
3291 		   vdev_id, peer_id, tid, offload, frag, msdu_count);
3292 
3293 	if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs32)) {
3294 		ath10k_warn(ar, "dropping invalid in order rx indication\n");
3295 		return -EINVAL;
3296 	}
3297 
3298 	/* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
3299 	 * extracted and processed.
3300 	 */
3301 	__skb_queue_head_init(&list);
3302 	if (ar->hw_params.target_64bit)
3303 		ret = ath10k_htt_rx_pop_paddr64_list(htt, &resp->rx_in_ord_ind,
3304 						     &list);
3305 	else
3306 		ret = ath10k_htt_rx_pop_paddr32_list(htt, &resp->rx_in_ord_ind,
3307 						     &list);
3308 
3309 	if (ret < 0) {
3310 		ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
3311 		htt->rx_confused = true;
3312 		return -EIO;
3313 	}
3314 
3315 	/* Offloaded frames are very different and need to be handled
3316 	 * separately.
3317 	 */
3318 	if (offload)
3319 		ath10k_htt_rx_h_rx_offload(ar, &list);
3320 
3321 	while (!skb_queue_empty(&list)) {
3322 		__skb_queue_head_init(&amsdu);
3323 		ret = ath10k_htt_rx_extract_amsdu(&ar->hw_params, &list, &amsdu);
3324 		switch (ret) {
3325 		case 0:
3326 			/* Note: The in-order indication may report interleaved
3327 			 * frames from different PPDUs meaning reported rx rate
3328 			 * to mac80211 isn't accurate/reliable. It's still
3329 			 * better to report something than nothing though. This
3330 			 * should still give an idea about rx rate to the user.
3331 			 */
3332 			ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
3333 			ath10k_htt_rx_h_filter(ar, &amsdu, status, NULL);
3334 			ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false, NULL,
3335 					     NULL, peer_id, frag);
3336 			ath10k_htt_rx_h_enqueue(ar, &amsdu, status);
3337 			break;
3338 		case -EAGAIN:
3339 			fallthrough;
3340 		default:
3341 			/* Should not happen. */
3342 			ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
3343 			htt->rx_confused = true;
3344 			__skb_queue_purge(&list);
3345 			return -EIO;
3346 		}
3347 	}
3348 	return ret;
3349 }
3350 
ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k * ar,const __le32 * resp_ids,int num_resp_ids)3351 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
3352 						   const __le32 *resp_ids,
3353 						   int num_resp_ids)
3354 {
3355 	int i;
3356 	u32 resp_id;
3357 
3358 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
3359 		   num_resp_ids);
3360 
3361 	for (i = 0; i < num_resp_ids; i++) {
3362 		resp_id = le32_to_cpu(resp_ids[i]);
3363 
3364 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
3365 			   resp_id);
3366 
3367 		/* TODO: free resp_id */
3368 	}
3369 }
3370 
ath10k_htt_rx_tx_fetch_ind(struct ath10k * ar,struct sk_buff * skb)3371 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
3372 {
3373 	struct ieee80211_hw *hw = ar->hw;
3374 	struct ieee80211_txq *txq;
3375 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3376 	struct htt_tx_fetch_record *record;
3377 	size_t len;
3378 	size_t max_num_bytes;
3379 	size_t max_num_msdus;
3380 	size_t num_bytes;
3381 	size_t num_msdus;
3382 	const __le32 *resp_ids;
3383 	u16 num_records;
3384 	u16 num_resp_ids;
3385 	u16 peer_id;
3386 	u8 tid;
3387 	int ret;
3388 	int i;
3389 	bool may_tx;
3390 
3391 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
3392 
3393 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
3394 	if (unlikely(skb->len < len)) {
3395 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
3396 		return;
3397 	}
3398 
3399 	num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
3400 	num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
3401 
3402 	len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
3403 	len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
3404 
3405 	if (unlikely(skb->len < len)) {
3406 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
3407 		return;
3408 	}
3409 
3410 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %u num resps %u seq %u\n",
3411 		   num_records, num_resp_ids,
3412 		   le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
3413 
3414 	if (!ar->htt.tx_q_state.enabled) {
3415 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
3416 		return;
3417 	}
3418 
3419 	if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
3420 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
3421 		return;
3422 	}
3423 
3424 	rcu_read_lock();
3425 
3426 	for (i = 0; i < num_records; i++) {
3427 		record = &resp->tx_fetch_ind.records[i];
3428 		peer_id = MS(le16_to_cpu(record->info),
3429 			     HTT_TX_FETCH_RECORD_INFO_PEER_ID);
3430 		tid = MS(le16_to_cpu(record->info),
3431 			 HTT_TX_FETCH_RECORD_INFO_TID);
3432 		max_num_msdus = le16_to_cpu(record->num_msdus);
3433 		max_num_bytes = le32_to_cpu(record->num_bytes);
3434 
3435 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %u tid %u msdus %zu bytes %zu\n",
3436 			   i, peer_id, tid, max_num_msdus, max_num_bytes);
3437 
3438 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3439 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3440 			ath10k_warn(ar, "received out of range peer_id %u tid %u\n",
3441 				    peer_id, tid);
3442 			continue;
3443 		}
3444 
3445 		spin_lock_bh(&ar->data_lock);
3446 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3447 		spin_unlock_bh(&ar->data_lock);
3448 
3449 		/* It is okay to release the lock and use txq because RCU read
3450 		 * lock is held.
3451 		 */
3452 
3453 		if (unlikely(!txq)) {
3454 			ath10k_warn(ar, "failed to lookup txq for peer_id %u tid %u\n",
3455 				    peer_id, tid);
3456 			continue;
3457 		}
3458 
3459 		num_msdus = 0;
3460 		num_bytes = 0;
3461 
3462 		ieee80211_txq_schedule_start(hw, txq->ac);
3463 		may_tx = ieee80211_txq_may_transmit(hw, txq);
3464 		while (num_msdus < max_num_msdus &&
3465 		       num_bytes < max_num_bytes) {
3466 			if (!may_tx)
3467 				break;
3468 
3469 			ret = ath10k_mac_tx_push_txq(hw, txq);
3470 			if (ret < 0)
3471 				break;
3472 
3473 			num_msdus++;
3474 			num_bytes += ret;
3475 		}
3476 		ieee80211_return_txq(hw, txq, false);
3477 		ieee80211_txq_schedule_end(hw, txq->ac);
3478 
3479 		record->num_msdus = cpu_to_le16(num_msdus);
3480 		record->num_bytes = cpu_to_le32(num_bytes);
3481 
3482 		ath10k_htt_tx_txq_recalc(hw, txq);
3483 	}
3484 
3485 	rcu_read_unlock();
3486 
3487 	resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
3488 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
3489 
3490 	ret = ath10k_htt_tx_fetch_resp(ar,
3491 				       resp->tx_fetch_ind.token,
3492 				       resp->tx_fetch_ind.fetch_seq_num,
3493 				       resp->tx_fetch_ind.records,
3494 				       num_records);
3495 	if (unlikely(ret)) {
3496 		ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
3497 			    le32_to_cpu(resp->tx_fetch_ind.token), ret);
3498 		/* FIXME: request fw restart */
3499 	}
3500 
3501 	ath10k_htt_tx_txq_sync(ar);
3502 }
3503 
ath10k_htt_rx_tx_fetch_confirm(struct ath10k * ar,struct sk_buff * skb)3504 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
3505 					   struct sk_buff *skb)
3506 {
3507 	const struct htt_resp *resp = (void *)skb->data;
3508 	size_t len;
3509 	int num_resp_ids;
3510 
3511 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
3512 
3513 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
3514 	if (unlikely(skb->len < len)) {
3515 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
3516 		return;
3517 	}
3518 
3519 	num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
3520 	len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
3521 
3522 	if (unlikely(skb->len < len)) {
3523 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
3524 		return;
3525 	}
3526 
3527 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
3528 					       resp->tx_fetch_confirm.resp_ids,
3529 					       num_resp_ids);
3530 }
3531 
ath10k_htt_rx_tx_mode_switch_ind(struct ath10k * ar,struct sk_buff * skb)3532 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
3533 					     struct sk_buff *skb)
3534 {
3535 	const struct htt_resp *resp = (void *)skb->data;
3536 	const struct htt_tx_mode_switch_record *record;
3537 	struct ieee80211_txq *txq;
3538 	struct ath10k_txq *artxq;
3539 	size_t len;
3540 	size_t num_records;
3541 	enum htt_tx_mode_switch_mode mode;
3542 	bool enable;
3543 	u16 info0;
3544 	u16 info1;
3545 	u16 threshold;
3546 	u16 peer_id;
3547 	u8 tid;
3548 	int i;
3549 
3550 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
3551 
3552 	len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
3553 	if (unlikely(skb->len < len)) {
3554 		ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
3555 		return;
3556 	}
3557 
3558 	info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
3559 	info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
3560 
3561 	enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
3562 	num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3563 	mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
3564 	threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3565 
3566 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3567 		   "htt rx tx mode switch ind info0 0x%04x info1 0x%04x enable %d num records %zd mode %d threshold %u\n",
3568 		   info0, info1, enable, num_records, mode, threshold);
3569 
3570 	len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
3571 
3572 	if (unlikely(skb->len < len)) {
3573 		ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
3574 		return;
3575 	}
3576 
3577 	switch (mode) {
3578 	case HTT_TX_MODE_SWITCH_PUSH:
3579 	case HTT_TX_MODE_SWITCH_PUSH_PULL:
3580 		break;
3581 	default:
3582 		ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
3583 			    mode);
3584 		return;
3585 	}
3586 
3587 	if (!enable)
3588 		return;
3589 
3590 	ar->htt.tx_q_state.enabled = enable;
3591 	ar->htt.tx_q_state.mode = mode;
3592 	ar->htt.tx_q_state.num_push_allowed = threshold;
3593 
3594 	rcu_read_lock();
3595 
3596 	for (i = 0; i < num_records; i++) {
3597 		record = &resp->tx_mode_switch_ind.records[i];
3598 		info0 = le16_to_cpu(record->info0);
3599 		peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
3600 		tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
3601 
3602 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3603 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3604 			ath10k_warn(ar, "received out of range peer_id %u tid %u\n",
3605 				    peer_id, tid);
3606 			continue;
3607 		}
3608 
3609 		spin_lock_bh(&ar->data_lock);
3610 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3611 		spin_unlock_bh(&ar->data_lock);
3612 
3613 		/* It is okay to release the lock and use txq because RCU read
3614 		 * lock is held.
3615 		 */
3616 
3617 		if (unlikely(!txq)) {
3618 			ath10k_warn(ar, "failed to lookup txq for peer_id %u tid %u\n",
3619 				    peer_id, tid);
3620 			continue;
3621 		}
3622 
3623 		spin_lock_bh(&ar->htt.tx_lock);
3624 		artxq = (void *)txq->drv_priv;
3625 		artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
3626 		spin_unlock_bh(&ar->htt.tx_lock);
3627 	}
3628 
3629 	rcu_read_unlock();
3630 
3631 	ath10k_mac_tx_push_pending(ar);
3632 }
3633 
ath10k_htt_htc_t2h_msg_handler(struct ath10k * ar,struct sk_buff * skb)3634 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3635 {
3636 	bool release;
3637 
3638 	release = ath10k_htt_t2h_msg_handler(ar, skb);
3639 
3640 	/* Free the indication buffer */
3641 	if (release)
3642 		dev_kfree_skb_any(skb);
3643 }
3644 
ath10k_get_legacy_rate_idx(struct ath10k * ar,u8 rate)3645 static inline s8 ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate)
3646 {
3647 	static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12,
3648 					  18, 24, 36, 48, 54};
3649 	int i;
3650 
3651 	for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) {
3652 		if (rate == legacy_rates[i])
3653 			return i;
3654 	}
3655 
3656 	ath10k_warn(ar, "Invalid legacy rate %d peer stats", rate);
3657 	return -EINVAL;
3658 }
3659 
3660 static void
ath10k_accumulate_per_peer_tx_stats(struct ath10k * ar,struct ath10k_sta * arsta,struct ath10k_per_peer_tx_stats * pstats,s8 legacy_rate_idx)3661 ath10k_accumulate_per_peer_tx_stats(struct ath10k *ar,
3662 				    struct ath10k_sta *arsta,
3663 				    struct ath10k_per_peer_tx_stats *pstats,
3664 				    s8 legacy_rate_idx)
3665 {
3666 	struct rate_info *txrate = &arsta->txrate;
3667 	struct ath10k_htt_tx_stats *tx_stats;
3668 	int idx, ht_idx, gi, mcs, bw, nss;
3669 	unsigned long flags;
3670 
3671 	if (!arsta->tx_stats)
3672 		return;
3673 
3674 	tx_stats = arsta->tx_stats;
3675 	flags = txrate->flags;
3676 	gi = test_bit(ATH10K_RATE_INFO_FLAGS_SGI_BIT, &flags);
3677 	mcs = ATH10K_HW_MCS_RATE(pstats->ratecode);
3678 	bw = txrate->bw;
3679 	nss = txrate->nss;
3680 	ht_idx = mcs + (nss - 1) * 8;
3681 	idx = mcs * 8 + 8 * 10 * (nss - 1);
3682 	idx += bw * 2 + gi;
3683 
3684 #define STATS_OP_FMT(name) tx_stats->stats[ATH10K_STATS_TYPE_##name]
3685 
3686 	if (txrate->flags & RATE_INFO_FLAGS_VHT_MCS) {
3687 		STATS_OP_FMT(SUCC).vht[0][mcs] += pstats->succ_bytes;
3688 		STATS_OP_FMT(SUCC).vht[1][mcs] += pstats->succ_pkts;
3689 		STATS_OP_FMT(FAIL).vht[0][mcs] += pstats->failed_bytes;
3690 		STATS_OP_FMT(FAIL).vht[1][mcs] += pstats->failed_pkts;
3691 		STATS_OP_FMT(RETRY).vht[0][mcs] += pstats->retry_bytes;
3692 		STATS_OP_FMT(RETRY).vht[1][mcs] += pstats->retry_pkts;
3693 	} else if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3694 		STATS_OP_FMT(SUCC).ht[0][ht_idx] += pstats->succ_bytes;
3695 		STATS_OP_FMT(SUCC).ht[1][ht_idx] += pstats->succ_pkts;
3696 		STATS_OP_FMT(FAIL).ht[0][ht_idx] += pstats->failed_bytes;
3697 		STATS_OP_FMT(FAIL).ht[1][ht_idx] += pstats->failed_pkts;
3698 		STATS_OP_FMT(RETRY).ht[0][ht_idx] += pstats->retry_bytes;
3699 		STATS_OP_FMT(RETRY).ht[1][ht_idx] += pstats->retry_pkts;
3700 	} else {
3701 		mcs = legacy_rate_idx;
3702 
3703 		STATS_OP_FMT(SUCC).legacy[0][mcs] += pstats->succ_bytes;
3704 		STATS_OP_FMT(SUCC).legacy[1][mcs] += pstats->succ_pkts;
3705 		STATS_OP_FMT(FAIL).legacy[0][mcs] += pstats->failed_bytes;
3706 		STATS_OP_FMT(FAIL).legacy[1][mcs] += pstats->failed_pkts;
3707 		STATS_OP_FMT(RETRY).legacy[0][mcs] += pstats->retry_bytes;
3708 		STATS_OP_FMT(RETRY).legacy[1][mcs] += pstats->retry_pkts;
3709 	}
3710 
3711 	if (ATH10K_HW_AMPDU(pstats->flags)) {
3712 		tx_stats->ba_fails += ATH10K_HW_BA_FAIL(pstats->flags);
3713 
3714 		if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3715 			STATS_OP_FMT(AMPDU).ht[0][ht_idx] +=
3716 				pstats->succ_bytes + pstats->retry_bytes;
3717 			STATS_OP_FMT(AMPDU).ht[1][ht_idx] +=
3718 				pstats->succ_pkts + pstats->retry_pkts;
3719 		} else {
3720 			STATS_OP_FMT(AMPDU).vht[0][mcs] +=
3721 				pstats->succ_bytes + pstats->retry_bytes;
3722 			STATS_OP_FMT(AMPDU).vht[1][mcs] +=
3723 				pstats->succ_pkts + pstats->retry_pkts;
3724 		}
3725 		STATS_OP_FMT(AMPDU).bw[0][bw] +=
3726 			pstats->succ_bytes + pstats->retry_bytes;
3727 		STATS_OP_FMT(AMPDU).nss[0][nss - 1] +=
3728 			pstats->succ_bytes + pstats->retry_bytes;
3729 		STATS_OP_FMT(AMPDU).gi[0][gi] +=
3730 			pstats->succ_bytes + pstats->retry_bytes;
3731 		STATS_OP_FMT(AMPDU).rate_table[0][idx] +=
3732 			pstats->succ_bytes + pstats->retry_bytes;
3733 		STATS_OP_FMT(AMPDU).bw[1][bw] +=
3734 			pstats->succ_pkts + pstats->retry_pkts;
3735 		STATS_OP_FMT(AMPDU).nss[1][nss - 1] +=
3736 			pstats->succ_pkts + pstats->retry_pkts;
3737 		STATS_OP_FMT(AMPDU).gi[1][gi] +=
3738 			pstats->succ_pkts + pstats->retry_pkts;
3739 		STATS_OP_FMT(AMPDU).rate_table[1][idx] +=
3740 			pstats->succ_pkts + pstats->retry_pkts;
3741 	} else {
3742 		tx_stats->ack_fails +=
3743 				ATH10K_HW_BA_FAIL(pstats->flags);
3744 	}
3745 
3746 	STATS_OP_FMT(SUCC).bw[0][bw] += pstats->succ_bytes;
3747 	STATS_OP_FMT(SUCC).nss[0][nss - 1] += pstats->succ_bytes;
3748 	STATS_OP_FMT(SUCC).gi[0][gi] += pstats->succ_bytes;
3749 
3750 	STATS_OP_FMT(SUCC).bw[1][bw] += pstats->succ_pkts;
3751 	STATS_OP_FMT(SUCC).nss[1][nss - 1] += pstats->succ_pkts;
3752 	STATS_OP_FMT(SUCC).gi[1][gi] += pstats->succ_pkts;
3753 
3754 	STATS_OP_FMT(FAIL).bw[0][bw] += pstats->failed_bytes;
3755 	STATS_OP_FMT(FAIL).nss[0][nss - 1] += pstats->failed_bytes;
3756 	STATS_OP_FMT(FAIL).gi[0][gi] += pstats->failed_bytes;
3757 
3758 	STATS_OP_FMT(FAIL).bw[1][bw] += pstats->failed_pkts;
3759 	STATS_OP_FMT(FAIL).nss[1][nss - 1] += pstats->failed_pkts;
3760 	STATS_OP_FMT(FAIL).gi[1][gi] += pstats->failed_pkts;
3761 
3762 	STATS_OP_FMT(RETRY).bw[0][bw] += pstats->retry_bytes;
3763 	STATS_OP_FMT(RETRY).nss[0][nss - 1] += pstats->retry_bytes;
3764 	STATS_OP_FMT(RETRY).gi[0][gi] += pstats->retry_bytes;
3765 
3766 	STATS_OP_FMT(RETRY).bw[1][bw] += pstats->retry_pkts;
3767 	STATS_OP_FMT(RETRY).nss[1][nss - 1] += pstats->retry_pkts;
3768 	STATS_OP_FMT(RETRY).gi[1][gi] += pstats->retry_pkts;
3769 
3770 	if (txrate->flags >= RATE_INFO_FLAGS_MCS) {
3771 		STATS_OP_FMT(SUCC).rate_table[0][idx] += pstats->succ_bytes;
3772 		STATS_OP_FMT(SUCC).rate_table[1][idx] += pstats->succ_pkts;
3773 		STATS_OP_FMT(FAIL).rate_table[0][idx] += pstats->failed_bytes;
3774 		STATS_OP_FMT(FAIL).rate_table[1][idx] += pstats->failed_pkts;
3775 		STATS_OP_FMT(RETRY).rate_table[0][idx] += pstats->retry_bytes;
3776 		STATS_OP_FMT(RETRY).rate_table[1][idx] += pstats->retry_pkts;
3777 	}
3778 
3779 	tx_stats->tx_duration += pstats->duration;
3780 }
3781 
3782 static void
ath10k_update_per_peer_tx_stats(struct ath10k * ar,struct ieee80211_sta * sta,struct ath10k_per_peer_tx_stats * peer_stats)3783 ath10k_update_per_peer_tx_stats(struct ath10k *ar,
3784 				struct ieee80211_sta *sta,
3785 				struct ath10k_per_peer_tx_stats *peer_stats)
3786 {
3787 	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
3788 	struct ieee80211_chanctx_conf *conf = NULL;
3789 	u8 rate = 0, sgi;
3790 	s8 rate_idx = 0;
3791 	bool skip_auto_rate;
3792 	struct rate_info txrate;
3793 
3794 	lockdep_assert_held(&ar->data_lock);
3795 
3796 	txrate.flags = ATH10K_HW_PREAMBLE(peer_stats->ratecode);
3797 	txrate.bw = ATH10K_HW_BW(peer_stats->flags);
3798 	txrate.nss = ATH10K_HW_NSS(peer_stats->ratecode);
3799 	txrate.mcs = ATH10K_HW_MCS_RATE(peer_stats->ratecode);
3800 	sgi = ATH10K_HW_GI(peer_stats->flags);
3801 	skip_auto_rate = ATH10K_FW_SKIPPED_RATE_CTRL(peer_stats->flags);
3802 
3803 	/* Firmware's rate control skips broadcast/management frames,
3804 	 * if host has configure fixed rates and in some other special cases.
3805 	 */
3806 	if (skip_auto_rate)
3807 		return;
3808 
3809 	if (txrate.flags == WMI_RATE_PREAMBLE_VHT && txrate.mcs > 9) {
3810 		ath10k_warn(ar, "Invalid VHT mcs %d peer stats",  txrate.mcs);
3811 		return;
3812 	}
3813 
3814 	if (txrate.flags == WMI_RATE_PREAMBLE_HT &&
3815 	    (txrate.mcs > 7 || txrate.nss < 1)) {
3816 		ath10k_warn(ar, "Invalid HT mcs %d nss %d peer stats",
3817 			    txrate.mcs, txrate.nss);
3818 		return;
3819 	}
3820 
3821 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
3822 	memset(&arsta->tx_info.status, 0, sizeof(arsta->tx_info.status));
3823 	if (txrate.flags == WMI_RATE_PREAMBLE_CCK ||
3824 	    txrate.flags == WMI_RATE_PREAMBLE_OFDM) {
3825 		rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode);
3826 		/* This is hacky, FW sends CCK rate 5.5Mbps as 6 */
3827 		if (rate == 6 && txrate.flags == WMI_RATE_PREAMBLE_CCK)
3828 			rate = 5;
3829 		rate_idx = ath10k_get_legacy_rate_idx(ar, rate);
3830 		if (rate_idx < 0)
3831 			return;
3832 		arsta->txrate.legacy = rate;
3833 	} else if (txrate.flags == WMI_RATE_PREAMBLE_HT) {
3834 		arsta->txrate.flags = RATE_INFO_FLAGS_MCS;
3835 		arsta->txrate.mcs = txrate.mcs + 8 * (txrate.nss - 1);
3836 	} else {
3837 		arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS;
3838 		arsta->txrate.mcs = txrate.mcs;
3839 	}
3840 
3841 	switch (txrate.flags) {
3842 	case WMI_RATE_PREAMBLE_OFDM:
3843 		if (arsta->arvif && arsta->arvif->vif)
3844 			conf = rcu_dereference(arsta->arvif->vif->bss_conf.chanctx_conf);
3845 		if (conf && conf->def.chan->band == NL80211_BAND_5GHZ)
3846 			arsta->tx_info.status.rates[0].idx = rate_idx - 4;
3847 		break;
3848 	case WMI_RATE_PREAMBLE_CCK:
3849 		arsta->tx_info.status.rates[0].idx = rate_idx;
3850 		if (sgi)
3851 			arsta->tx_info.status.rates[0].flags |=
3852 				(IEEE80211_TX_RC_USE_SHORT_PREAMBLE |
3853 				 IEEE80211_TX_RC_SHORT_GI);
3854 		break;
3855 	case WMI_RATE_PREAMBLE_HT:
3856 		arsta->tx_info.status.rates[0].idx =
3857 				txrate.mcs + ((txrate.nss - 1) * 8);
3858 		if (sgi)
3859 			arsta->tx_info.status.rates[0].flags |=
3860 					IEEE80211_TX_RC_SHORT_GI;
3861 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_MCS;
3862 		break;
3863 	case WMI_RATE_PREAMBLE_VHT:
3864 		ieee80211_rate_set_vht(&arsta->tx_info.status.rates[0],
3865 				       txrate.mcs, txrate.nss);
3866 		if (sgi)
3867 			arsta->tx_info.status.rates[0].flags |=
3868 						IEEE80211_TX_RC_SHORT_GI;
3869 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_VHT_MCS;
3870 		break;
3871 	}
3872 
3873 	arsta->txrate.nss = txrate.nss;
3874 	arsta->txrate.bw = ath10k_bw_to_mac80211_bw(txrate.bw);
3875 	arsta->last_tx_bitrate = cfg80211_calculate_bitrate(&arsta->txrate);
3876 	if (sgi)
3877 		arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
3878 
3879 	switch (arsta->txrate.bw) {
3880 	case RATE_INFO_BW_40:
3881 		arsta->tx_info.status.rates[0].flags |=
3882 				IEEE80211_TX_RC_40_MHZ_WIDTH;
3883 		break;
3884 	case RATE_INFO_BW_80:
3885 		arsta->tx_info.status.rates[0].flags |=
3886 				IEEE80211_TX_RC_80_MHZ_WIDTH;
3887 		break;
3888 	case RATE_INFO_BW_160:
3889 		arsta->tx_info.status.rates[0].flags |=
3890 				IEEE80211_TX_RC_160_MHZ_WIDTH;
3891 		break;
3892 	}
3893 
3894 	if (peer_stats->succ_pkts) {
3895 		arsta->tx_info.flags = IEEE80211_TX_STAT_ACK;
3896 		arsta->tx_info.status.rates[0].count = 1;
3897 		ieee80211_tx_rate_update(ar->hw, sta, &arsta->tx_info);
3898 	}
3899 
3900 	if (ar->htt.disable_tx_comp) {
3901 		arsta->tx_failed += peer_stats->failed_pkts;
3902 		ath10k_dbg(ar, ATH10K_DBG_HTT, "tx failed %d\n",
3903 			   arsta->tx_failed);
3904 	}
3905 
3906 	arsta->tx_retries += peer_stats->retry_pkts;
3907 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx retries %d", arsta->tx_retries);
3908 
3909 	if (ath10k_debug_is_extd_tx_stats_enabled(ar))
3910 		ath10k_accumulate_per_peer_tx_stats(ar, arsta, peer_stats,
3911 						    rate_idx);
3912 }
3913 
ath10k_htt_fetch_peer_stats(struct ath10k * ar,struct sk_buff * skb)3914 static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
3915 					struct sk_buff *skb)
3916 {
3917 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3918 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3919 	struct htt_per_peer_tx_stats_ind *tx_stats;
3920 	struct ieee80211_sta *sta;
3921 	struct ath10k_peer *peer;
3922 	int peer_id, i;
3923 	u8 ppdu_len, num_ppdu;
3924 
3925 	num_ppdu = resp->peer_tx_stats.num_ppdu;
3926 	ppdu_len = resp->peer_tx_stats.ppdu_len * sizeof(__le32);
3927 
3928 	if (skb->len < sizeof(struct htt_resp_hdr) + num_ppdu * ppdu_len) {
3929 		ath10k_warn(ar, "Invalid peer stats buf length %d\n", skb->len);
3930 		return;
3931 	}
3932 
3933 	tx_stats = (struct htt_per_peer_tx_stats_ind *)
3934 			(resp->peer_tx_stats.payload);
3935 	peer_id = __le16_to_cpu(tx_stats->peer_id);
3936 
3937 	rcu_read_lock();
3938 	spin_lock_bh(&ar->data_lock);
3939 	peer = ath10k_peer_find_by_id(ar, peer_id);
3940 	if (!peer || !peer->sta) {
3941 		ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n",
3942 			    peer_id);
3943 		goto out;
3944 	}
3945 
3946 	sta = peer->sta;
3947 	for (i = 0; i < num_ppdu; i++) {
3948 		tx_stats = (struct htt_per_peer_tx_stats_ind *)
3949 			   (resp->peer_tx_stats.payload + i * ppdu_len);
3950 
3951 		p_tx_stats->succ_bytes = __le32_to_cpu(tx_stats->succ_bytes);
3952 		p_tx_stats->retry_bytes = __le32_to_cpu(tx_stats->retry_bytes);
3953 		p_tx_stats->failed_bytes =
3954 				__le32_to_cpu(tx_stats->failed_bytes);
3955 		p_tx_stats->ratecode = tx_stats->ratecode;
3956 		p_tx_stats->flags = tx_stats->flags;
3957 		p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts);
3958 		p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts);
3959 		p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts);
3960 		p_tx_stats->duration = __le16_to_cpu(tx_stats->tx_duration);
3961 
3962 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3963 	}
3964 
3965 out:
3966 	spin_unlock_bh(&ar->data_lock);
3967 	rcu_read_unlock();
3968 }
3969 
ath10k_fetch_10_2_tx_stats(struct ath10k * ar,u8 * data)3970 static void ath10k_fetch_10_2_tx_stats(struct ath10k *ar, u8 *data)
3971 {
3972 	struct ath10k_pktlog_hdr *hdr = (struct ath10k_pktlog_hdr *)data;
3973 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3974 	struct ath10k_10_2_peer_tx_stats *tx_stats;
3975 	struct ieee80211_sta *sta;
3976 	struct ath10k_peer *peer;
3977 	u16 log_type = __le16_to_cpu(hdr->log_type);
3978 	u32 peer_id = 0, i;
3979 
3980 	if (log_type != ATH_PKTLOG_TYPE_TX_STAT)
3981 		return;
3982 
3983 	tx_stats = (struct ath10k_10_2_peer_tx_stats *)((hdr->payload) +
3984 		    ATH10K_10_2_TX_STATS_OFFSET);
3985 
3986 	if (!tx_stats->tx_ppdu_cnt)
3987 		return;
3988 
3989 	peer_id = tx_stats->peer_id;
3990 
3991 	rcu_read_lock();
3992 	spin_lock_bh(&ar->data_lock);
3993 	peer = ath10k_peer_find_by_id(ar, peer_id);
3994 	if (!peer || !peer->sta) {
3995 		ath10k_warn(ar, "Invalid peer id %d in peer stats buffer\n",
3996 			    peer_id);
3997 		goto out;
3998 	}
3999 
4000 	sta = peer->sta;
4001 	for (i = 0; i < tx_stats->tx_ppdu_cnt; i++) {
4002 		p_tx_stats->succ_bytes =
4003 			__le16_to_cpu(tx_stats->success_bytes[i]);
4004 		p_tx_stats->retry_bytes =
4005 			__le16_to_cpu(tx_stats->retry_bytes[i]);
4006 		p_tx_stats->failed_bytes =
4007 			__le16_to_cpu(tx_stats->failed_bytes[i]);
4008 		p_tx_stats->ratecode = tx_stats->ratecode[i];
4009 		p_tx_stats->flags = tx_stats->flags[i];
4010 		p_tx_stats->succ_pkts = tx_stats->success_pkts[i];
4011 		p_tx_stats->retry_pkts = tx_stats->retry_pkts[i];
4012 		p_tx_stats->failed_pkts = tx_stats->failed_pkts[i];
4013 
4014 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
4015 	}
4016 	spin_unlock_bh(&ar->data_lock);
4017 	rcu_read_unlock();
4018 
4019 	return;
4020 
4021 out:
4022 	spin_unlock_bh(&ar->data_lock);
4023 	rcu_read_unlock();
4024 }
4025 
ath10k_htt_rx_pn_len(enum htt_security_types sec_type)4026 static int ath10k_htt_rx_pn_len(enum htt_security_types sec_type)
4027 {
4028 	switch (sec_type) {
4029 	case HTT_SECURITY_TKIP:
4030 	case HTT_SECURITY_TKIP_NOMIC:
4031 	case HTT_SECURITY_AES_CCMP:
4032 		return 48;
4033 	default:
4034 		return 0;
4035 	}
4036 }
4037 
ath10k_htt_rx_sec_ind_handler(struct ath10k * ar,struct htt_security_indication * ev)4038 static void ath10k_htt_rx_sec_ind_handler(struct ath10k *ar,
4039 					  struct htt_security_indication *ev)
4040 {
4041 	enum htt_txrx_sec_cast_type sec_index;
4042 	enum htt_security_types sec_type;
4043 	struct ath10k_peer *peer;
4044 
4045 	spin_lock_bh(&ar->data_lock);
4046 
4047 	peer = ath10k_peer_find_by_id(ar, __le16_to_cpu(ev->peer_id));
4048 	if (!peer) {
4049 		ath10k_warn(ar, "failed to find peer id %d for security indication",
4050 			    __le16_to_cpu(ev->peer_id));
4051 		goto out;
4052 	}
4053 
4054 	sec_type = MS(ev->flags, HTT_SECURITY_TYPE);
4055 
4056 	if (ev->flags & HTT_SECURITY_IS_UNICAST)
4057 		sec_index = HTT_TXRX_SEC_UCAST;
4058 	else
4059 		sec_index = HTT_TXRX_SEC_MCAST;
4060 
4061 	peer->rx_pn[sec_index].sec_type = sec_type;
4062 	peer->rx_pn[sec_index].pn_len = ath10k_htt_rx_pn_len(sec_type);
4063 
4064 	memset(peer->tids_last_pn_valid, 0, sizeof(peer->tids_last_pn_valid));
4065 	memset(peer->tids_last_pn, 0, sizeof(peer->tids_last_pn));
4066 
4067 out:
4068 	spin_unlock_bh(&ar->data_lock);
4069 }
4070 
ath10k_htt_t2h_msg_handler(struct ath10k * ar,struct sk_buff * skb)4071 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
4072 {
4073 	struct ath10k_htt *htt = &ar->htt;
4074 	struct htt_resp *resp = (struct htt_resp *)skb->data;
4075 	enum htt_t2h_msg_type type;
4076 
4077 	/* confirm alignment */
4078 	if (!IS_ALIGNED((unsigned long)skb->data, 4))
4079 		ath10k_warn(ar, "unaligned htt message, expect trouble\n");
4080 
4081 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
4082 		   resp->hdr.msg_type);
4083 
4084 	if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
4085 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
4086 			   resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
4087 		return true;
4088 	}
4089 	type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
4090 
4091 	switch (type) {
4092 	case HTT_T2H_MSG_TYPE_VERSION_CONF: {
4093 		htt->target_version_major = resp->ver_resp.major;
4094 		htt->target_version_minor = resp->ver_resp.minor;
4095 		complete(&htt->target_version_received);
4096 		break;
4097 	}
4098 	case HTT_T2H_MSG_TYPE_RX_IND:
4099 		if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
4100 			ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind);
4101 		} else {
4102 			skb_queue_tail(&htt->rx_indication_head, skb);
4103 			return false;
4104 		}
4105 		break;
4106 	case HTT_T2H_MSG_TYPE_PEER_MAP: {
4107 		struct htt_peer_map_event ev = {
4108 			.vdev_id = resp->peer_map.vdev_id,
4109 			.peer_id = __le16_to_cpu(resp->peer_map.peer_id),
4110 		};
4111 		memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
4112 		ath10k_peer_map_event(htt, &ev);
4113 		break;
4114 	}
4115 	case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
4116 		struct htt_peer_unmap_event ev = {
4117 			.peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
4118 		};
4119 		ath10k_peer_unmap_event(htt, &ev);
4120 		break;
4121 	}
4122 	case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
4123 		struct htt_tx_done tx_done = {};
4124 		struct ath10k_htt *htt = &ar->htt;
4125 		struct ath10k_htc *htc = &ar->htc;
4126 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
4127 		int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
4128 		int info = __le32_to_cpu(resp->mgmt_tx_completion.info);
4129 
4130 		tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
4131 
4132 		switch (status) {
4133 		case HTT_MGMT_TX_STATUS_OK:
4134 			tx_done.status = HTT_TX_COMPL_STATE_ACK;
4135 			if (test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS,
4136 				     ar->wmi.svc_map) &&
4137 			    (resp->mgmt_tx_completion.flags &
4138 			     HTT_MGMT_TX_CMPL_FLAG_ACK_RSSI)) {
4139 				tx_done.ack_rssi =
4140 				FIELD_GET(HTT_MGMT_TX_CMPL_INFO_ACK_RSSI_MASK,
4141 					  info);
4142 			}
4143 			break;
4144 		case HTT_MGMT_TX_STATUS_RETRY:
4145 			tx_done.status = HTT_TX_COMPL_STATE_NOACK;
4146 			break;
4147 		case HTT_MGMT_TX_STATUS_DROP:
4148 			tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
4149 			break;
4150 		}
4151 
4152 		if (htt->disable_tx_comp) {
4153 			spin_lock_bh(&htc->tx_lock);
4154 			ep->tx_credits++;
4155 			spin_unlock_bh(&htc->tx_lock);
4156 		}
4157 
4158 		status = ath10k_txrx_tx_unref(htt, &tx_done);
4159 		if (!status) {
4160 			spin_lock_bh(&htt->tx_lock);
4161 			ath10k_htt_tx_mgmt_dec_pending(htt);
4162 			spin_unlock_bh(&htt->tx_lock);
4163 		}
4164 		break;
4165 	}
4166 	case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
4167 		ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
4168 		break;
4169 	case HTT_T2H_MSG_TYPE_SEC_IND: {
4170 		struct ath10k *ar = htt->ar;
4171 		struct htt_security_indication *ev = &resp->security_indication;
4172 
4173 		ath10k_htt_rx_sec_ind_handler(ar, ev);
4174 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4175 			   "sec ind peer_id %d unicast %d type %d\n",
4176 			  __le16_to_cpu(ev->peer_id),
4177 			  !!(ev->flags & HTT_SECURITY_IS_UNICAST),
4178 			  MS(ev->flags, HTT_SECURITY_TYPE));
4179 		complete(&ar->install_key_done);
4180 		break;
4181 	}
4182 	case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
4183 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
4184 				skb->data, skb->len);
4185 		atomic_inc(&htt->num_mpdus_ready);
4186 
4187 		return ath10k_htt_rx_proc_rx_frag_ind(htt,
4188 						      &resp->rx_frag_ind,
4189 						      skb);
4190 	}
4191 	case HTT_T2H_MSG_TYPE_TEST:
4192 		break;
4193 	case HTT_T2H_MSG_TYPE_STATS_CONF:
4194 		trace_ath10k_htt_stats(ar, skb->data, skb->len);
4195 		break;
4196 	case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
4197 		/* Firmware can return tx frames if it's unable to fully
4198 		 * process them and suspects host may be able to fix it. ath10k
4199 		 * sends all tx frames as already inspected so this shouldn't
4200 		 * happen unless fw has a bug.
4201 		 */
4202 		ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
4203 		break;
4204 	case HTT_T2H_MSG_TYPE_RX_ADDBA:
4205 		ath10k_htt_rx_addba(ar, resp);
4206 		break;
4207 	case HTT_T2H_MSG_TYPE_RX_DELBA:
4208 		ath10k_htt_rx_delba(ar, resp);
4209 		break;
4210 	case HTT_T2H_MSG_TYPE_PKTLOG: {
4211 		trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
4212 					skb->len -
4213 					offsetof(struct htt_resp,
4214 						 pktlog_msg.payload));
4215 
4216 		if (ath10k_peer_stats_enabled(ar))
4217 			ath10k_fetch_10_2_tx_stats(ar,
4218 						   resp->pktlog_msg.payload);
4219 		break;
4220 	}
4221 	case HTT_T2H_MSG_TYPE_RX_FLUSH: {
4222 		/* Ignore this event because mac80211 takes care of Rx
4223 		 * aggregation reordering.
4224 		 */
4225 		break;
4226 	}
4227 	case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
4228 		skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
4229 		return false;
4230 	}
4231 	case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND: {
4232 		struct ath10k_htt *htt = &ar->htt;
4233 		struct ath10k_htc *htc = &ar->htc;
4234 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
4235 		u32 msg_word = __le32_to_cpu(*(__le32 *)resp);
4236 		int htt_credit_delta;
4237 
4238 		htt_credit_delta = HTT_TX_CREDIT_DELTA_ABS_GET(msg_word);
4239 		if (HTT_TX_CREDIT_SIGN_BIT_GET(msg_word))
4240 			htt_credit_delta = -htt_credit_delta;
4241 
4242 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4243 			   "htt credit update delta %d\n",
4244 			   htt_credit_delta);
4245 
4246 		if (htt->disable_tx_comp) {
4247 			spin_lock_bh(&htc->tx_lock);
4248 			ep->tx_credits += htt_credit_delta;
4249 			spin_unlock_bh(&htc->tx_lock);
4250 			ath10k_dbg(ar, ATH10K_DBG_HTT,
4251 				   "htt credit total %d\n",
4252 				   ep->tx_credits);
4253 			ep->ep_ops.ep_tx_credits(htc->ar);
4254 		}
4255 		break;
4256 	}
4257 	case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
4258 		u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
4259 		u32 freq = __le32_to_cpu(resp->chan_change.freq);
4260 
4261 		ar->tgt_oper_chan = ieee80211_get_channel(ar->hw->wiphy, freq);
4262 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4263 			   "htt chan change freq %u phymode %s\n",
4264 			   freq, ath10k_wmi_phymode_str(phymode));
4265 		break;
4266 	}
4267 	case HTT_T2H_MSG_TYPE_AGGR_CONF:
4268 		break;
4269 	case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
4270 		struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
4271 
4272 		if (!tx_fetch_ind) {
4273 			ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
4274 			break;
4275 		}
4276 		skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
4277 		break;
4278 	}
4279 	case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
4280 		ath10k_htt_rx_tx_fetch_confirm(ar, skb);
4281 		break;
4282 	case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
4283 		ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
4284 		break;
4285 	case HTT_T2H_MSG_TYPE_PEER_STATS:
4286 		ath10k_htt_fetch_peer_stats(ar, skb);
4287 		break;
4288 	case HTT_T2H_MSG_TYPE_EN_STATS:
4289 	default:
4290 		ath10k_warn(ar, "htt event (%d) not handled\n",
4291 			    resp->hdr.msg_type);
4292 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
4293 				skb->data, skb->len);
4294 		break;
4295 	}
4296 	return true;
4297 }
4298 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
4299 
ath10k_htt_rx_pktlog_completion_handler(struct ath10k * ar,struct sk_buff * skb)4300 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
4301 					     struct sk_buff *skb)
4302 {
4303 	trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
4304 	dev_kfree_skb_any(skb);
4305 }
4306 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
4307 
ath10k_htt_rx_deliver_msdu(struct ath10k * ar,int quota,int budget)4308 static int ath10k_htt_rx_deliver_msdu(struct ath10k *ar, int quota, int budget)
4309 {
4310 	struct sk_buff *skb;
4311 
4312 	while (quota < budget) {
4313 		if (skb_queue_empty(&ar->htt.rx_msdus_q))
4314 			break;
4315 
4316 		skb = skb_dequeue(&ar->htt.rx_msdus_q);
4317 		if (!skb)
4318 			break;
4319 		ath10k_process_rx(ar, skb);
4320 		quota++;
4321 	}
4322 
4323 	return quota;
4324 }
4325 
ath10k_htt_rx_hl_indication(struct ath10k * ar,int budget)4326 int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget)
4327 {
4328 	struct htt_resp *resp;
4329 	struct ath10k_htt *htt = &ar->htt;
4330 	struct sk_buff *skb;
4331 	bool release;
4332 	int quota;
4333 
4334 	for (quota = 0; quota < budget; quota++) {
4335 		skb = skb_dequeue(&htt->rx_indication_head);
4336 		if (!skb)
4337 			break;
4338 
4339 		resp = (struct htt_resp *)skb->data;
4340 
4341 		release = ath10k_htt_rx_proc_rx_ind_hl(htt,
4342 						       &resp->rx_ind_hl,
4343 						       skb,
4344 						       HTT_RX_PN_CHECK,
4345 						       HTT_RX_NON_TKIP_MIC);
4346 
4347 		if (release)
4348 			dev_kfree_skb_any(skb);
4349 
4350 		ath10k_dbg(ar, ATH10K_DBG_HTT, "rx indication poll pending count:%d\n",
4351 			   skb_queue_len(&htt->rx_indication_head));
4352 	}
4353 	return quota;
4354 }
4355 EXPORT_SYMBOL(ath10k_htt_rx_hl_indication);
4356 
ath10k_htt_txrx_compl_task(struct ath10k * ar,int budget)4357 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
4358 {
4359 	struct ath10k_htt *htt = &ar->htt;
4360 	struct htt_tx_done tx_done = {};
4361 	struct sk_buff_head tx_ind_q;
4362 	struct sk_buff *skb;
4363 	unsigned long flags;
4364 	int quota = 0, done, ret;
4365 	bool resched_napi = false;
4366 
4367 	__skb_queue_head_init(&tx_ind_q);
4368 
4369 	/* Process pending frames before dequeuing more data
4370 	 * from hardware.
4371 	 */
4372 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4373 	if (quota == budget) {
4374 		resched_napi = true;
4375 		goto exit;
4376 	}
4377 
4378 	while ((skb = skb_dequeue(&htt->rx_in_ord_compl_q))) {
4379 		spin_lock_bh(&htt->rx_ring.lock);
4380 		ret = ath10k_htt_rx_in_ord_ind(ar, skb);
4381 		spin_unlock_bh(&htt->rx_ring.lock);
4382 
4383 		dev_kfree_skb_any(skb);
4384 		if (ret == -EIO) {
4385 			resched_napi = true;
4386 			goto exit;
4387 		}
4388 	}
4389 
4390 	while (atomic_read(&htt->num_mpdus_ready)) {
4391 		ret = ath10k_htt_rx_handle_amsdu(htt);
4392 		if (ret == -EIO) {
4393 			resched_napi = true;
4394 			goto exit;
4395 		}
4396 		atomic_dec(&htt->num_mpdus_ready);
4397 	}
4398 
4399 	/* Deliver received data after processing data from hardware */
4400 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4401 
4402 	/* From NAPI documentation:
4403 	 *  The napi poll() function may also process TX completions, in which
4404 	 *  case if it processes the entire TX ring then it should count that
4405 	 *  work as the rest of the budget.
4406 	 */
4407 	if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo))
4408 		quota = budget;
4409 
4410 	/* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
4411 	 * From kfifo_get() documentation:
4412 	 *  Note that with only one concurrent reader and one concurrent writer,
4413 	 *  you don't need extra locking to use these macro.
4414 	 */
4415 	while (kfifo_get(&htt->txdone_fifo, &tx_done))
4416 		ath10k_txrx_tx_unref(htt, &tx_done);
4417 
4418 	ath10k_mac_tx_push_pending(ar);
4419 
4420 	spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
4421 	skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
4422 	spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
4423 
4424 	while ((skb = __skb_dequeue(&tx_ind_q))) {
4425 		ath10k_htt_rx_tx_fetch_ind(ar, skb);
4426 		dev_kfree_skb_any(skb);
4427 	}
4428 
4429 exit:
4430 	ath10k_htt_rx_msdu_buff_replenish(htt);
4431 	/* In case of rx failure or more data to read, report budget
4432 	 * to reschedule NAPI poll
4433 	 */
4434 	done = resched_napi ? budget : quota;
4435 
4436 	return done;
4437 }
4438 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);
4439 
4440 static const struct ath10k_htt_rx_ops htt_rx_ops_32 = {
4441 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_32,
4442 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_32,
4443 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_32,
4444 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_32,
4445 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_32,
4446 };
4447 
4448 static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
4449 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_64,
4450 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_64,
4451 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_64,
4452 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_64,
4453 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
4454 };
4455 
4456 static const struct ath10k_htt_rx_ops htt_rx_ops_hl = {
4457 	.htt_rx_proc_rx_frag_ind = ath10k_htt_rx_proc_rx_frag_ind_hl,
4458 };
4459 
ath10k_htt_set_rx_ops(struct ath10k_htt * htt)4460 void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
4461 {
4462 	struct ath10k *ar = htt->ar;
4463 
4464 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
4465 		htt->rx_ops = &htt_rx_ops_hl;
4466 	else if (ar->hw_params.target_64bit)
4467 		htt->rx_ops = &htt_rx_ops_64;
4468 	else
4469 		htt->rx_ops = &htt_rx_ops_32;
4470 }
4471