1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (c) 2005-2011 Atheros Communications Inc.
4  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
5  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
6  */
7 
8 #include "core.h"
9 #include "htc.h"
10 #include "htt.h"
11 #include "txrx.h"
12 #include "debug.h"
13 #include "trace.h"
14 #include "mac.h"
15 
16 #include <linux/log2.h>
17 #include <linux/bitfield.h>
18 
19 /* when under memory pressure rx ring refill may fail and needs a retry */
20 #define HTT_RX_RING_REFILL_RETRY_MS 50
21 
22 #define HTT_RX_RING_REFILL_RESCHED_MS 5
23 
24 /* shortcut to interpret a raw memory buffer as a rx descriptor */
25 #define HTT_RX_BUF_TO_RX_DESC(hw, buf) ath10k_htt_rx_desc_from_raw_buffer(hw, buf)
26 
27 static int ath10k_htt_rx_get_csum_state(struct ath10k_hw_params *hw, struct sk_buff *skb);
28 
29 static struct sk_buff *
ath10k_htt_rx_find_skb_paddr(struct ath10k * ar,u64 paddr)30 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u64 paddr)
31 {
32 	struct ath10k_skb_rxcb *rxcb;
33 
34 	hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
35 		if (rxcb->paddr == paddr)
36 			return ATH10K_RXCB_SKB(rxcb);
37 
38 	WARN_ON_ONCE(1);
39 	return NULL;
40 }
41 
ath10k_htt_rx_ring_free(struct ath10k_htt * htt)42 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
43 {
44 	struct sk_buff *skb;
45 	struct ath10k_skb_rxcb *rxcb;
46 	struct hlist_node *n;
47 	int i;
48 
49 	if (htt->rx_ring.in_ord_rx) {
50 		hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
51 			skb = ATH10K_RXCB_SKB(rxcb);
52 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
53 					 skb->len + skb_tailroom(skb),
54 					 DMA_FROM_DEVICE);
55 			hash_del(&rxcb->hlist);
56 			dev_kfree_skb_any(skb);
57 		}
58 	} else {
59 		for (i = 0; i < htt->rx_ring.size; i++) {
60 			skb = htt->rx_ring.netbufs_ring[i];
61 			if (!skb)
62 				continue;
63 
64 			rxcb = ATH10K_SKB_RXCB(skb);
65 			dma_unmap_single(htt->ar->dev, rxcb->paddr,
66 					 skb->len + skb_tailroom(skb),
67 					 DMA_FROM_DEVICE);
68 			dev_kfree_skb_any(skb);
69 		}
70 	}
71 
72 	htt->rx_ring.fill_cnt = 0;
73 	hash_init(htt->rx_ring.skb_table);
74 	memset(htt->rx_ring.netbufs_ring, 0,
75 	       htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
76 }
77 
ath10k_htt_get_rx_ring_size_32(struct ath10k_htt * htt)78 static size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
79 {
80 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
81 }
82 
ath10k_htt_get_rx_ring_size_64(struct ath10k_htt * htt)83 static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
84 {
85 	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
86 }
87 
ath10k_htt_config_paddrs_ring_32(struct ath10k_htt * htt,void * vaddr)88 static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
89 					     void *vaddr)
90 {
91 	htt->rx_ring.paddrs_ring_32 = vaddr;
92 }
93 
ath10k_htt_config_paddrs_ring_64(struct ath10k_htt * htt,void * vaddr)94 static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
95 					     void *vaddr)
96 {
97 	htt->rx_ring.paddrs_ring_64 = vaddr;
98 }
99 
ath10k_htt_set_paddrs_ring_32(struct ath10k_htt * htt,dma_addr_t paddr,int idx)100 static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
101 					  dma_addr_t paddr, int idx)
102 {
103 	htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
104 }
105 
ath10k_htt_set_paddrs_ring_64(struct ath10k_htt * htt,dma_addr_t paddr,int idx)106 static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
107 					  dma_addr_t paddr, int idx)
108 {
109 	htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
110 }
111 
ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt * htt,int idx)112 static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
113 {
114 	htt->rx_ring.paddrs_ring_32[idx] = 0;
115 }
116 
ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt * htt,int idx)117 static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
118 {
119 	htt->rx_ring.paddrs_ring_64[idx] = 0;
120 }
121 
ath10k_htt_get_vaddr_ring_32(struct ath10k_htt * htt)122 static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
123 {
124 	return (void *)htt->rx_ring.paddrs_ring_32;
125 }
126 
ath10k_htt_get_vaddr_ring_64(struct ath10k_htt * htt)127 static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
128 {
129 	return (void *)htt->rx_ring.paddrs_ring_64;
130 }
131 
__ath10k_htt_rx_ring_fill_n(struct ath10k_htt * htt,int num)132 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
133 {
134 	struct ath10k_hw_params *hw = &htt->ar->hw_params;
135 	struct htt_rx_desc *rx_desc;
136 	struct ath10k_skb_rxcb *rxcb;
137 	struct sk_buff *skb;
138 	dma_addr_t paddr;
139 	int ret = 0, idx;
140 
141 	/* The Full Rx Reorder firmware has no way of telling the host
142 	 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
143 	 * To keep things simple make sure ring is always half empty. This
144 	 * guarantees there'll be no replenishment overruns possible.
145 	 */
146 	BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
147 
148 	idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
149 
150 	if (idx < 0 || idx >= htt->rx_ring.size) {
151 		ath10k_err(htt->ar, "rx ring index is not valid, firmware malfunctioning?\n");
152 		idx &= htt->rx_ring.size_mask;
153 		ret = -ENOMEM;
154 		goto fail;
155 	}
156 
157 	while (num > 0) {
158 		skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
159 		if (!skb) {
160 			ret = -ENOMEM;
161 			goto fail;
162 		}
163 
164 		if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
165 			skb_pull(skb,
166 				 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
167 				 skb->data);
168 
169 		/* Clear rx_desc attention word before posting to Rx ring */
170 		rx_desc = HTT_RX_BUF_TO_RX_DESC(hw, skb->data);
171 		ath10k_htt_rx_desc_get_attention(hw, rx_desc)->flags = __cpu_to_le32(0);
172 
173 		paddr = dma_map_single(htt->ar->dev, skb->data,
174 				       skb->len + skb_tailroom(skb),
175 				       DMA_FROM_DEVICE);
176 
177 		if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
178 			dev_kfree_skb_any(skb);
179 			ret = -ENOMEM;
180 			goto fail;
181 		}
182 
183 		rxcb = ATH10K_SKB_RXCB(skb);
184 		rxcb->paddr = paddr;
185 		htt->rx_ring.netbufs_ring[idx] = skb;
186 		ath10k_htt_set_paddrs_ring(htt, paddr, idx);
187 		htt->rx_ring.fill_cnt++;
188 
189 		if (htt->rx_ring.in_ord_rx) {
190 			hash_add(htt->rx_ring.skb_table,
191 				 &ATH10K_SKB_RXCB(skb)->hlist,
192 				 paddr);
193 		}
194 
195 		num--;
196 		idx++;
197 		idx &= htt->rx_ring.size_mask;
198 	}
199 
200 fail:
201 	/*
202 	 * Make sure the rx buffer is updated before available buffer
203 	 * index to avoid any potential rx ring corruption.
204 	 */
205 	mb();
206 	*htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
207 	return ret;
208 }
209 
ath10k_htt_rx_ring_fill_n(struct ath10k_htt * htt,int num)210 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
211 {
212 	lockdep_assert_held(&htt->rx_ring.lock);
213 	return __ath10k_htt_rx_ring_fill_n(htt, num);
214 }
215 
ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt * htt)216 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
217 {
218 	int ret, num_deficit, num_to_fill;
219 
220 	/* Refilling the whole RX ring buffer proves to be a bad idea. The
221 	 * reason is RX may take up significant amount of CPU cycles and starve
222 	 * other tasks, e.g. TX on an ethernet device while acting as a bridge
223 	 * with ath10k wlan interface. This ended up with very poor performance
224 	 * once CPU the host system was overwhelmed with RX on ath10k.
225 	 *
226 	 * By limiting the number of refills the replenishing occurs
227 	 * progressively. This in turns makes use of the fact tasklets are
228 	 * processed in FIFO order. This means actual RX processing can starve
229 	 * out refilling. If there's not enough buffers on RX ring FW will not
230 	 * report RX until it is refilled with enough buffers. This
231 	 * automatically balances load wrt to CPU power.
232 	 *
233 	 * This probably comes at a cost of lower maximum throughput but
234 	 * improves the average and stability.
235 	 */
236 	spin_lock_bh(&htt->rx_ring.lock);
237 	num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
238 	num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
239 	num_deficit -= num_to_fill;
240 	ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
241 	if (ret == -ENOMEM) {
242 		/*
243 		 * Failed to fill it to the desired level -
244 		 * we'll start a timer and try again next time.
245 		 * As long as enough buffers are left in the ring for
246 		 * another A-MPDU rx, no special recovery is needed.
247 		 */
248 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
249 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
250 	} else if (num_deficit > 0) {
251 		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
252 			  msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
253 	}
254 	spin_unlock_bh(&htt->rx_ring.lock);
255 }
256 
ath10k_htt_rx_ring_refill_retry(struct timer_list * t)257 static void ath10k_htt_rx_ring_refill_retry(struct timer_list *t)
258 {
259 	struct ath10k_htt *htt = from_timer(htt, t, rx_ring.refill_retry_timer);
260 
261 	ath10k_htt_rx_msdu_buff_replenish(htt);
262 }
263 
ath10k_htt_rx_ring_refill(struct ath10k * ar)264 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
265 {
266 	struct ath10k_htt *htt = &ar->htt;
267 	int ret;
268 
269 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
270 		return 0;
271 
272 	spin_lock_bh(&htt->rx_ring.lock);
273 	ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
274 					      htt->rx_ring.fill_cnt));
275 
276 	if (ret)
277 		ath10k_htt_rx_ring_free(htt);
278 
279 	spin_unlock_bh(&htt->rx_ring.lock);
280 
281 	return ret;
282 }
283 
ath10k_htt_rx_free(struct ath10k_htt * htt)284 void ath10k_htt_rx_free(struct ath10k_htt *htt)
285 {
286 	if (htt->ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
287 		return;
288 
289 	del_timer_sync(&htt->rx_ring.refill_retry_timer);
290 
291 	skb_queue_purge(&htt->rx_msdus_q);
292 	skb_queue_purge(&htt->rx_in_ord_compl_q);
293 	skb_queue_purge(&htt->tx_fetch_ind_q);
294 
295 	spin_lock_bh(&htt->rx_ring.lock);
296 	ath10k_htt_rx_ring_free(htt);
297 	spin_unlock_bh(&htt->rx_ring.lock);
298 
299 	dma_free_coherent(htt->ar->dev,
300 			  ath10k_htt_get_rx_ring_size(htt),
301 			  ath10k_htt_get_vaddr_ring(htt),
302 			  htt->rx_ring.base_paddr);
303 
304 	dma_free_coherent(htt->ar->dev,
305 			  sizeof(*htt->rx_ring.alloc_idx.vaddr),
306 			  htt->rx_ring.alloc_idx.vaddr,
307 			  htt->rx_ring.alloc_idx.paddr);
308 
309 	kfree(htt->rx_ring.netbufs_ring);
310 }
311 
ath10k_htt_rx_netbuf_pop(struct ath10k_htt * htt)312 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
313 {
314 	struct ath10k *ar = htt->ar;
315 	int idx;
316 	struct sk_buff *msdu;
317 
318 	lockdep_assert_held(&htt->rx_ring.lock);
319 
320 	if (htt->rx_ring.fill_cnt == 0) {
321 		ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
322 		return NULL;
323 	}
324 
325 	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
326 	msdu = htt->rx_ring.netbufs_ring[idx];
327 	htt->rx_ring.netbufs_ring[idx] = NULL;
328 	ath10k_htt_reset_paddrs_ring(htt, idx);
329 
330 	idx++;
331 	idx &= htt->rx_ring.size_mask;
332 	htt->rx_ring.sw_rd_idx.msdu_payld = idx;
333 	htt->rx_ring.fill_cnt--;
334 
335 	dma_unmap_single(htt->ar->dev,
336 			 ATH10K_SKB_RXCB(msdu)->paddr,
337 			 msdu->len + skb_tailroom(msdu),
338 			 DMA_FROM_DEVICE);
339 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
340 			msdu->data, msdu->len + skb_tailroom(msdu));
341 
342 	return msdu;
343 }
344 
345 /* 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)346 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
347 				   struct sk_buff_head *amsdu)
348 {
349 	struct ath10k *ar = htt->ar;
350 	struct ath10k_hw_params *hw = &ar->hw_params;
351 	int msdu_len, msdu_chaining = 0;
352 	struct sk_buff *msdu;
353 	struct htt_rx_desc *rx_desc;
354 	struct rx_attention *rx_desc_attention;
355 	struct rx_frag_info_common *rx_desc_frag_info_common;
356 	struct rx_msdu_start_common *rx_desc_msdu_start_common;
357 	struct rx_msdu_end_common *rx_desc_msdu_end_common;
358 
359 	lockdep_assert_held(&htt->rx_ring.lock);
360 
361 	for (;;) {
362 		int last_msdu, msdu_len_invalid, msdu_chained;
363 
364 		msdu = ath10k_htt_rx_netbuf_pop(htt);
365 		if (!msdu) {
366 			__skb_queue_purge(amsdu);
367 			return -ENOENT;
368 		}
369 
370 		__skb_queue_tail(amsdu, msdu);
371 
372 		rx_desc = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
373 		rx_desc_attention = ath10k_htt_rx_desc_get_attention(hw, rx_desc);
374 		rx_desc_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw,
375 									      rx_desc);
376 		rx_desc_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rx_desc);
377 		rx_desc_frag_info_common = ath10k_htt_rx_desc_get_frag_info(hw, rx_desc);
378 
379 		/* FIXME: we must report msdu payload since this is what caller
380 		 * expects now
381 		 */
382 		skb_put(msdu, hw->rx_desc_ops->rx_desc_msdu_payload_offset);
383 		skb_pull(msdu, hw->rx_desc_ops->rx_desc_msdu_payload_offset);
384 
385 		/*
386 		 * Sanity check - confirm the HW is finished filling in the
387 		 * rx data.
388 		 * If the HW and SW are working correctly, then it's guaranteed
389 		 * that the HW's MAC DMA is done before this point in the SW.
390 		 * To prevent the case that we handle a stale Rx descriptor,
391 		 * just assert for now until we have a way to recover.
392 		 */
393 		if (!(__le32_to_cpu(rx_desc_attention->flags)
394 				& RX_ATTENTION_FLAGS_MSDU_DONE)) {
395 			__skb_queue_purge(amsdu);
396 			return -EIO;
397 		}
398 
399 		msdu_len_invalid = !!(__le32_to_cpu(rx_desc_attention->flags)
400 					& (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
401 					   RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
402 		msdu_len = MS(__le32_to_cpu(rx_desc_msdu_start_common->info0),
403 			      RX_MSDU_START_INFO0_MSDU_LENGTH);
404 		msdu_chained = rx_desc_frag_info_common->ring2_more_count;
405 
406 		if (msdu_len_invalid)
407 			msdu_len = 0;
408 
409 		skb_trim(msdu, 0);
410 		skb_put(msdu, min(msdu_len, ath10k_htt_rx_msdu_size(hw)));
411 		msdu_len -= msdu->len;
412 
413 		/* Note: Chained buffers do not contain rx descriptor */
414 		while (msdu_chained--) {
415 			msdu = ath10k_htt_rx_netbuf_pop(htt);
416 			if (!msdu) {
417 				__skb_queue_purge(amsdu);
418 				return -ENOENT;
419 			}
420 
421 			__skb_queue_tail(amsdu, msdu);
422 			skb_trim(msdu, 0);
423 			skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
424 			msdu_len -= msdu->len;
425 			msdu_chaining = 1;
426 		}
427 
428 		last_msdu = __le32_to_cpu(rx_desc_msdu_end_common->info0) &
429 				RX_MSDU_END_INFO0_LAST_MSDU;
430 
431 		/* FIXME: why are we skipping the first part of the rx_desc? */
432 		trace_ath10k_htt_rx_desc(ar, (void *)rx_desc + sizeof(u32),
433 					 hw->rx_desc_ops->rx_desc_size - sizeof(u32));
434 
435 		if (last_msdu)
436 			break;
437 	}
438 
439 	if (skb_queue_empty(amsdu))
440 		msdu_chaining = -1;
441 
442 	/*
443 	 * Don't refill the ring yet.
444 	 *
445 	 * First, the elements popped here are still in use - it is not
446 	 * safe to overwrite them until the matching call to
447 	 * mpdu_desc_list_next. Second, for efficiency it is preferable to
448 	 * refill the rx ring with 1 PPDU's worth of rx buffers (something
449 	 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
450 	 * (something like 3 buffers). Consequently, we'll rely on the txrx
451 	 * SW to tell us when it is done pulling all the PPDU's rx buffers
452 	 * out of the rx ring, and then refill it just once.
453 	 */
454 
455 	return msdu_chaining;
456 }
457 
ath10k_htt_rx_pop_paddr(struct ath10k_htt * htt,u64 paddr)458 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
459 					       u64 paddr)
460 {
461 	struct ath10k *ar = htt->ar;
462 	struct ath10k_skb_rxcb *rxcb;
463 	struct sk_buff *msdu;
464 
465 	lockdep_assert_held(&htt->rx_ring.lock);
466 
467 	msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
468 	if (!msdu)
469 		return NULL;
470 
471 	rxcb = ATH10K_SKB_RXCB(msdu);
472 	hash_del(&rxcb->hlist);
473 	htt->rx_ring.fill_cnt--;
474 
475 	dma_unmap_single(htt->ar->dev, rxcb->paddr,
476 			 msdu->len + skb_tailroom(msdu),
477 			 DMA_FROM_DEVICE);
478 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
479 			msdu->data, msdu->len + skb_tailroom(msdu));
480 
481 	return msdu;
482 }
483 
ath10k_htt_append_frag_list(struct sk_buff * skb_head,struct sk_buff * frag_list,unsigned int frag_len)484 static inline void ath10k_htt_append_frag_list(struct sk_buff *skb_head,
485 					       struct sk_buff *frag_list,
486 					       unsigned int frag_len)
487 {
488 	skb_shinfo(skb_head)->frag_list = frag_list;
489 	skb_head->data_len = frag_len;
490 	skb_head->len += skb_head->data_len;
491 }
492 
ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt * htt,struct sk_buff * msdu,struct htt_rx_in_ord_msdu_desc ** msdu_desc)493 static int ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt *htt,
494 					     struct sk_buff *msdu,
495 					     struct htt_rx_in_ord_msdu_desc **msdu_desc)
496 {
497 	struct ath10k *ar = htt->ar;
498 	struct ath10k_hw_params *hw = &ar->hw_params;
499 	u32 paddr;
500 	struct sk_buff *frag_buf;
501 	struct sk_buff *prev_frag_buf;
502 	u8 last_frag;
503 	struct htt_rx_in_ord_msdu_desc *ind_desc = *msdu_desc;
504 	struct htt_rx_desc *rxd;
505 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
506 
507 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
508 	trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
509 
510 	skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
511 	skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
512 	skb_put(msdu, min(amsdu_len, ath10k_htt_rx_msdu_size(hw)));
513 	amsdu_len -= msdu->len;
514 
515 	last_frag = ind_desc->reserved;
516 	if (last_frag) {
517 		if (amsdu_len) {
518 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
519 				    __le16_to_cpu(ind_desc->msdu_len),
520 				    amsdu_len);
521 		}
522 		return 0;
523 	}
524 
525 	ind_desc++;
526 	paddr = __le32_to_cpu(ind_desc->msdu_paddr);
527 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
528 	if (!frag_buf) {
529 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%x", paddr);
530 		return -ENOENT;
531 	}
532 
533 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
534 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
535 
536 	amsdu_len -= frag_buf->len;
537 	prev_frag_buf = frag_buf;
538 	last_frag = ind_desc->reserved;
539 	while (!last_frag) {
540 		ind_desc++;
541 		paddr = __le32_to_cpu(ind_desc->msdu_paddr);
542 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
543 		if (!frag_buf) {
544 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%x",
545 				    paddr);
546 			prev_frag_buf->next = NULL;
547 			return -ENOENT;
548 		}
549 
550 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
551 		last_frag = ind_desc->reserved;
552 		amsdu_len -= frag_buf->len;
553 
554 		prev_frag_buf->next = frag_buf;
555 		prev_frag_buf = frag_buf;
556 	}
557 
558 	if (amsdu_len) {
559 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
560 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
561 	}
562 
563 	*msdu_desc = ind_desc;
564 
565 	prev_frag_buf->next = NULL;
566 	return 0;
567 }
568 
569 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)570 ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt *htt,
571 				  struct sk_buff *msdu,
572 				  struct htt_rx_in_ord_msdu_desc_ext **msdu_desc)
573 {
574 	struct ath10k *ar = htt->ar;
575 	struct ath10k_hw_params *hw = &ar->hw_params;
576 	u64 paddr;
577 	struct sk_buff *frag_buf;
578 	struct sk_buff *prev_frag_buf;
579 	u8 last_frag;
580 	struct htt_rx_in_ord_msdu_desc_ext *ind_desc = *msdu_desc;
581 	struct htt_rx_desc *rxd;
582 	int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
583 
584 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
585 	trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
586 
587 	skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
588 	skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
589 	skb_put(msdu, min(amsdu_len, ath10k_htt_rx_msdu_size(hw)));
590 	amsdu_len -= msdu->len;
591 
592 	last_frag = ind_desc->reserved;
593 	if (last_frag) {
594 		if (amsdu_len) {
595 			ath10k_warn(ar, "invalid amsdu len %u, left %d",
596 				    __le16_to_cpu(ind_desc->msdu_len),
597 				    amsdu_len);
598 		}
599 		return 0;
600 	}
601 
602 	ind_desc++;
603 	paddr = __le64_to_cpu(ind_desc->msdu_paddr);
604 	frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
605 	if (!frag_buf) {
606 		ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%llx", paddr);
607 		return -ENOENT;
608 	}
609 
610 	skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
611 	ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
612 
613 	amsdu_len -= frag_buf->len;
614 	prev_frag_buf = frag_buf;
615 	last_frag = ind_desc->reserved;
616 	while (!last_frag) {
617 		ind_desc++;
618 		paddr = __le64_to_cpu(ind_desc->msdu_paddr);
619 		frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
620 		if (!frag_buf) {
621 			ath10k_warn(ar, "failed to pop frag-n paddr: 0x%llx",
622 				    paddr);
623 			prev_frag_buf->next = NULL;
624 			return -ENOENT;
625 		}
626 
627 		skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
628 		last_frag = ind_desc->reserved;
629 		amsdu_len -= frag_buf->len;
630 
631 		prev_frag_buf->next = frag_buf;
632 		prev_frag_buf = frag_buf;
633 	}
634 
635 	if (amsdu_len) {
636 		ath10k_warn(ar, "invalid amsdu len %u, left %d",
637 			    __le16_to_cpu(ind_desc->msdu_len), amsdu_len);
638 	}
639 
640 	*msdu_desc = ind_desc;
641 
642 	prev_frag_buf->next = NULL;
643 	return 0;
644 }
645 
ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt * htt,struct htt_rx_in_ord_ind * ev,struct sk_buff_head * list)646 static int ath10k_htt_rx_pop_paddr32_list(struct ath10k_htt *htt,
647 					  struct htt_rx_in_ord_ind *ev,
648 					  struct sk_buff_head *list)
649 {
650 	struct ath10k *ar = htt->ar;
651 	struct ath10k_hw_params *hw = &ar->hw_params;
652 	struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs32;
653 	struct htt_rx_desc *rxd;
654 	struct rx_attention *rxd_attention;
655 	struct sk_buff *msdu;
656 	int msdu_count, ret;
657 	bool is_offload;
658 	u32 paddr;
659 
660 	lockdep_assert_held(&htt->rx_ring.lock);
661 
662 	msdu_count = __le16_to_cpu(ev->msdu_count);
663 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
664 
665 	while (msdu_count--) {
666 		paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
667 
668 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
669 		if (!msdu) {
670 			__skb_queue_purge(list);
671 			return -ENOENT;
672 		}
673 
674 		if (!is_offload && ar->monitor_arvif) {
675 			ret = ath10k_htt_rx_handle_amsdu_mon_32(htt, msdu,
676 								&msdu_desc);
677 			if (ret) {
678 				__skb_queue_purge(list);
679 				return ret;
680 			}
681 			__skb_queue_tail(list, msdu);
682 			msdu_desc++;
683 			continue;
684 		}
685 
686 		__skb_queue_tail(list, msdu);
687 
688 		if (!is_offload) {
689 			rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
690 			rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
691 
692 			trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
693 
694 			skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
695 			skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
696 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
697 
698 			if (!(__le32_to_cpu(rxd_attention->flags) &
699 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
700 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
701 				return -EIO;
702 			}
703 		}
704 
705 		msdu_desc++;
706 	}
707 
708 	return 0;
709 }
710 
ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt * htt,struct htt_rx_in_ord_ind * ev,struct sk_buff_head * list)711 static int ath10k_htt_rx_pop_paddr64_list(struct ath10k_htt *htt,
712 					  struct htt_rx_in_ord_ind *ev,
713 					  struct sk_buff_head *list)
714 {
715 	struct ath10k *ar = htt->ar;
716 	struct ath10k_hw_params *hw = &ar->hw_params;
717 	struct htt_rx_in_ord_msdu_desc_ext *msdu_desc = ev->msdu_descs64;
718 	struct htt_rx_desc *rxd;
719 	struct rx_attention *rxd_attention;
720 	struct sk_buff *msdu;
721 	int msdu_count, ret;
722 	bool is_offload;
723 	u64 paddr;
724 
725 	lockdep_assert_held(&htt->rx_ring.lock);
726 
727 	msdu_count = __le16_to_cpu(ev->msdu_count);
728 	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
729 
730 	while (msdu_count--) {
731 		paddr = __le64_to_cpu(msdu_desc->msdu_paddr);
732 		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
733 		if (!msdu) {
734 			__skb_queue_purge(list);
735 			return -ENOENT;
736 		}
737 
738 		if (!is_offload && ar->monitor_arvif) {
739 			ret = ath10k_htt_rx_handle_amsdu_mon_64(htt, msdu,
740 								&msdu_desc);
741 			if (ret) {
742 				__skb_queue_purge(list);
743 				return ret;
744 			}
745 			__skb_queue_tail(list, msdu);
746 			msdu_desc++;
747 			continue;
748 		}
749 
750 		__skb_queue_tail(list, msdu);
751 
752 		if (!is_offload) {
753 			rxd = HTT_RX_BUF_TO_RX_DESC(hw, msdu->data);
754 			rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
755 
756 			trace_ath10k_htt_rx_desc(ar, rxd, hw->rx_desc_ops->rx_desc_size);
757 
758 			skb_put(msdu, hw->rx_desc_ops->rx_desc_size);
759 			skb_pull(msdu, hw->rx_desc_ops->rx_desc_size);
760 			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
761 
762 			if (!(__le32_to_cpu(rxd_attention->flags) &
763 			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
764 				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
765 				return -EIO;
766 			}
767 		}
768 
769 		msdu_desc++;
770 	}
771 
772 	return 0;
773 }
774 
ath10k_htt_rx_alloc(struct ath10k_htt * htt)775 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
776 {
777 	struct ath10k *ar = htt->ar;
778 	dma_addr_t paddr;
779 	void *vaddr, *vaddr_ring;
780 	size_t size;
781 	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
782 
783 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
784 		return 0;
785 
786 	htt->rx_confused = false;
787 
788 	/* XXX: The fill level could be changed during runtime in response to
789 	 * the host processing latency. Is this really worth it?
790 	 */
791 	htt->rx_ring.size = HTT_RX_RING_SIZE;
792 	htt->rx_ring.size_mask = htt->rx_ring.size - 1;
793 	htt->rx_ring.fill_level = ar->hw_params.rx_ring_fill_level;
794 
795 	if (!is_power_of_2(htt->rx_ring.size)) {
796 		ath10k_warn(ar, "htt rx ring size is not power of 2\n");
797 		return -EINVAL;
798 	}
799 
800 	htt->rx_ring.netbufs_ring =
801 		kcalloc(htt->rx_ring.size, sizeof(struct sk_buff *),
802 			GFP_KERNEL);
803 	if (!htt->rx_ring.netbufs_ring)
804 		goto err_netbuf;
805 
806 	size = ath10k_htt_get_rx_ring_size(htt);
807 
808 	vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
809 	if (!vaddr_ring)
810 		goto err_dma_ring;
811 
812 	ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
813 	htt->rx_ring.base_paddr = paddr;
814 
815 	vaddr = dma_alloc_coherent(htt->ar->dev,
816 				   sizeof(*htt->rx_ring.alloc_idx.vaddr),
817 				   &paddr, GFP_KERNEL);
818 	if (!vaddr)
819 		goto err_dma_idx;
820 
821 	htt->rx_ring.alloc_idx.vaddr = vaddr;
822 	htt->rx_ring.alloc_idx.paddr = paddr;
823 	htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
824 	*htt->rx_ring.alloc_idx.vaddr = 0;
825 
826 	/* Initialize the Rx refill retry timer */
827 	timer_setup(timer, ath10k_htt_rx_ring_refill_retry, 0);
828 
829 	spin_lock_init(&htt->rx_ring.lock);
830 
831 	htt->rx_ring.fill_cnt = 0;
832 	htt->rx_ring.sw_rd_idx.msdu_payld = 0;
833 	hash_init(htt->rx_ring.skb_table);
834 
835 	skb_queue_head_init(&htt->rx_msdus_q);
836 	skb_queue_head_init(&htt->rx_in_ord_compl_q);
837 	skb_queue_head_init(&htt->tx_fetch_ind_q);
838 	atomic_set(&htt->num_mpdus_ready, 0);
839 
840 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
841 		   htt->rx_ring.size, htt->rx_ring.fill_level);
842 	return 0;
843 
844 err_dma_idx:
845 	dma_free_coherent(htt->ar->dev,
846 			  ath10k_htt_get_rx_ring_size(htt),
847 			  vaddr_ring,
848 			  htt->rx_ring.base_paddr);
849 err_dma_ring:
850 	kfree(htt->rx_ring.netbufs_ring);
851 err_netbuf:
852 	return -ENOMEM;
853 }
854 
ath10k_htt_rx_crypto_param_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)855 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
856 					  enum htt_rx_mpdu_encrypt_type type)
857 {
858 	switch (type) {
859 	case HTT_RX_MPDU_ENCRYPT_NONE:
860 		return 0;
861 	case HTT_RX_MPDU_ENCRYPT_WEP40:
862 	case HTT_RX_MPDU_ENCRYPT_WEP104:
863 		return IEEE80211_WEP_IV_LEN;
864 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
865 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
866 		return IEEE80211_TKIP_IV_LEN;
867 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
868 		return IEEE80211_CCMP_HDR_LEN;
869 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
870 		return IEEE80211_CCMP_256_HDR_LEN;
871 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
872 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
873 		return IEEE80211_GCMP_HDR_LEN;
874 	case HTT_RX_MPDU_ENCRYPT_WEP128:
875 	case HTT_RX_MPDU_ENCRYPT_WAPI:
876 		break;
877 	}
878 
879 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
880 	return 0;
881 }
882 
883 #define MICHAEL_MIC_LEN 8
884 
ath10k_htt_rx_crypto_mic_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)885 static int ath10k_htt_rx_crypto_mic_len(struct ath10k *ar,
886 					enum htt_rx_mpdu_encrypt_type type)
887 {
888 	switch (type) {
889 	case HTT_RX_MPDU_ENCRYPT_NONE:
890 	case HTT_RX_MPDU_ENCRYPT_WEP40:
891 	case HTT_RX_MPDU_ENCRYPT_WEP104:
892 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
893 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
894 		return 0;
895 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
896 		return IEEE80211_CCMP_MIC_LEN;
897 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
898 		return IEEE80211_CCMP_256_MIC_LEN;
899 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
900 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
901 		return IEEE80211_GCMP_MIC_LEN;
902 	case HTT_RX_MPDU_ENCRYPT_WEP128:
903 	case HTT_RX_MPDU_ENCRYPT_WAPI:
904 		break;
905 	}
906 
907 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
908 	return 0;
909 }
910 
ath10k_htt_rx_crypto_icv_len(struct ath10k * ar,enum htt_rx_mpdu_encrypt_type type)911 static int ath10k_htt_rx_crypto_icv_len(struct ath10k *ar,
912 					enum htt_rx_mpdu_encrypt_type type)
913 {
914 	switch (type) {
915 	case HTT_RX_MPDU_ENCRYPT_NONE:
916 	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
917 	case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
918 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
919 	case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
920 		return 0;
921 	case HTT_RX_MPDU_ENCRYPT_WEP40:
922 	case HTT_RX_MPDU_ENCRYPT_WEP104:
923 		return IEEE80211_WEP_ICV_LEN;
924 	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
925 	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
926 		return IEEE80211_TKIP_ICV_LEN;
927 	case HTT_RX_MPDU_ENCRYPT_WEP128:
928 	case HTT_RX_MPDU_ENCRYPT_WAPI:
929 		break;
930 	}
931 
932 	ath10k_warn(ar, "unsupported encryption type %d\n", type);
933 	return 0;
934 }
935 
936 struct amsdu_subframe_hdr {
937 	u8 dst[ETH_ALEN];
938 	u8 src[ETH_ALEN];
939 	__be16 len;
940 } __packed;
941 
942 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
943 
ath10k_bw_to_mac80211_bw(u8 bw)944 static inline u8 ath10k_bw_to_mac80211_bw(u8 bw)
945 {
946 	u8 ret = 0;
947 
948 	switch (bw) {
949 	case 0:
950 		ret = RATE_INFO_BW_20;
951 		break;
952 	case 1:
953 		ret = RATE_INFO_BW_40;
954 		break;
955 	case 2:
956 		ret = RATE_INFO_BW_80;
957 		break;
958 	case 3:
959 		ret = RATE_INFO_BW_160;
960 		break;
961 	}
962 
963 	return ret;
964 }
965 
ath10k_htt_rx_h_rates(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)966 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
967 				  struct ieee80211_rx_status *status,
968 				  struct htt_rx_desc *rxd)
969 {
970 	struct ath10k_hw_params *hw = &ar->hw_params;
971 	struct rx_attention *rxd_attention;
972 	struct rx_mpdu_start *rxd_mpdu_start;
973 	struct rx_mpdu_end *rxd_mpdu_end;
974 	struct rx_msdu_start_common *rxd_msdu_start_common;
975 	struct rx_msdu_end_common *rxd_msdu_end_common;
976 	struct rx_ppdu_start *rxd_ppdu_start;
977 	struct ieee80211_supported_band *sband;
978 	u8 cck, rate, bw, sgi, mcs, nss;
979 	u8 *rxd_msdu_payload;
980 	u8 preamble = 0;
981 	u8 group_id;
982 	u32 info1, info2, info3;
983 	u32 stbc, nsts_su;
984 
985 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
986 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
987 	rxd_mpdu_end = ath10k_htt_rx_desc_get_mpdu_end(hw, rxd);
988 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
989 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
990 	rxd_ppdu_start = ath10k_htt_rx_desc_get_ppdu_start(hw, rxd);
991 	rxd_msdu_payload = ath10k_htt_rx_desc_get_msdu_payload(hw, rxd);
992 
993 	info1 = __le32_to_cpu(rxd_ppdu_start->info1);
994 	info2 = __le32_to_cpu(rxd_ppdu_start->info2);
995 	info3 = __le32_to_cpu(rxd_ppdu_start->info3);
996 
997 	preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
998 
999 	switch (preamble) {
1000 	case HTT_RX_LEGACY:
1001 		/* To get legacy rate index band is required. Since band can't
1002 		 * be undefined check if freq is non-zero.
1003 		 */
1004 		if (!status->freq)
1005 			return;
1006 
1007 		cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
1008 		rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
1009 		rate &= ~RX_PPDU_START_RATE_FLAG;
1010 
1011 		sband = &ar->mac.sbands[status->band];
1012 		status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
1013 		break;
1014 	case HTT_RX_HT:
1015 	case HTT_RX_HT_WITH_TXBF:
1016 		/* HT-SIG - Table 20-11 in info2 and info3 */
1017 		mcs = info2 & 0x1F;
1018 		nss = mcs >> 3;
1019 		bw = (info2 >> 7) & 1;
1020 		sgi = (info3 >> 7) & 1;
1021 
1022 		status->rate_idx = mcs;
1023 		status->encoding = RX_ENC_HT;
1024 		if (sgi)
1025 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1026 		if (bw)
1027 			status->bw = RATE_INFO_BW_40;
1028 		break;
1029 	case HTT_RX_VHT:
1030 	case HTT_RX_VHT_WITH_TXBF:
1031 		/* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
1032 		 * TODO check this
1033 		 */
1034 		bw = info2 & 3;
1035 		sgi = info3 & 1;
1036 		stbc = (info2 >> 3) & 1;
1037 		group_id = (info2 >> 4) & 0x3F;
1038 
1039 		if (GROUP_ID_IS_SU_MIMO(group_id)) {
1040 			mcs = (info3 >> 4) & 0x0F;
1041 			nsts_su = ((info2 >> 10) & 0x07);
1042 			if (stbc)
1043 				nss = (nsts_su >> 2) + 1;
1044 			else
1045 				nss = (nsts_su + 1);
1046 		} else {
1047 			/* Hardware doesn't decode VHT-SIG-B into Rx descriptor
1048 			 * so it's impossible to decode MCS. Also since
1049 			 * firmware consumes Group Id Management frames host
1050 			 * has no knowledge regarding group/user position
1051 			 * mapping so it's impossible to pick the correct Nsts
1052 			 * from VHT-SIG-A1.
1053 			 *
1054 			 * Bandwidth and SGI are valid so report the rateinfo
1055 			 * on best-effort basis.
1056 			 */
1057 			mcs = 0;
1058 			nss = 1;
1059 		}
1060 
1061 		if (mcs > 0x09) {
1062 			ath10k_warn(ar, "invalid MCS received %u\n", mcs);
1063 			ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
1064 				    __le32_to_cpu(rxd_attention->flags),
1065 				    __le32_to_cpu(rxd_mpdu_start->info0),
1066 				    __le32_to_cpu(rxd_mpdu_start->info1),
1067 				    __le32_to_cpu(rxd_msdu_start_common->info0),
1068 				    __le32_to_cpu(rxd_msdu_start_common->info1),
1069 				    rxd_ppdu_start->info0,
1070 				    __le32_to_cpu(rxd_ppdu_start->info1),
1071 				    __le32_to_cpu(rxd_ppdu_start->info2),
1072 				    __le32_to_cpu(rxd_ppdu_start->info3),
1073 				    __le32_to_cpu(rxd_ppdu_start->info4));
1074 
1075 			ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
1076 				    __le32_to_cpu(rxd_msdu_end_common->info0),
1077 				    __le32_to_cpu(rxd_mpdu_end->info0));
1078 
1079 			ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
1080 					"rx desc msdu payload: ",
1081 					rxd_msdu_payload, 50);
1082 		}
1083 
1084 		status->rate_idx = mcs;
1085 		status->nss = nss;
1086 
1087 		if (sgi)
1088 			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1089 
1090 		status->bw = ath10k_bw_to_mac80211_bw(bw);
1091 		status->encoding = RX_ENC_VHT;
1092 		break;
1093 	default:
1094 		break;
1095 	}
1096 }
1097 
1098 static struct ieee80211_channel *
ath10k_htt_rx_h_peer_channel(struct ath10k * ar,struct htt_rx_desc * rxd)1099 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
1100 {
1101 	struct ath10k_hw_params *hw = &ar->hw_params;
1102 	struct rx_attention *rxd_attention;
1103 	struct rx_msdu_end_common *rxd_msdu_end_common;
1104 	struct rx_mpdu_start *rxd_mpdu_start;
1105 	struct ath10k_peer *peer;
1106 	struct ath10k_vif *arvif;
1107 	struct cfg80211_chan_def def;
1108 	u16 peer_id;
1109 
1110 	lockdep_assert_held(&ar->data_lock);
1111 
1112 	if (!rxd)
1113 		return NULL;
1114 
1115 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1116 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1117 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
1118 
1119 	if (rxd_attention->flags &
1120 	    __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
1121 		return NULL;
1122 
1123 	if (!(rxd_msdu_end_common->info0 &
1124 	      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
1125 		return NULL;
1126 
1127 	peer_id = MS(__le32_to_cpu(rxd_mpdu_start->info0),
1128 		     RX_MPDU_START_INFO0_PEER_IDX);
1129 
1130 	peer = ath10k_peer_find_by_id(ar, peer_id);
1131 	if (!peer)
1132 		return NULL;
1133 
1134 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
1135 	if (WARN_ON_ONCE(!arvif))
1136 		return NULL;
1137 
1138 	if (ath10k_mac_vif_chan(arvif->vif, &def))
1139 		return NULL;
1140 
1141 	return def.chan;
1142 }
1143 
1144 static struct ieee80211_channel *
ath10k_htt_rx_h_vdev_channel(struct ath10k * ar,u32 vdev_id)1145 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
1146 {
1147 	struct ath10k_vif *arvif;
1148 	struct cfg80211_chan_def def;
1149 
1150 	lockdep_assert_held(&ar->data_lock);
1151 
1152 	list_for_each_entry(arvif, &ar->arvifs, list) {
1153 		if (arvif->vdev_id == vdev_id &&
1154 		    ath10k_mac_vif_chan(arvif->vif, &def) == 0)
1155 			return def.chan;
1156 	}
1157 
1158 	return NULL;
1159 }
1160 
1161 static void
ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf,void * data)1162 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
1163 			      struct ieee80211_chanctx_conf *conf,
1164 			      void *data)
1165 {
1166 	struct cfg80211_chan_def *def = data;
1167 
1168 	*def = conf->def;
1169 }
1170 
1171 static struct ieee80211_channel *
ath10k_htt_rx_h_any_channel(struct ath10k * ar)1172 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
1173 {
1174 	struct cfg80211_chan_def def = {};
1175 
1176 	ieee80211_iter_chan_contexts_atomic(ar->hw,
1177 					    ath10k_htt_rx_h_any_chan_iter,
1178 					    &def);
1179 
1180 	return def.chan;
1181 }
1182 
ath10k_htt_rx_h_channel(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd,u32 vdev_id)1183 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
1184 				    struct ieee80211_rx_status *status,
1185 				    struct htt_rx_desc *rxd,
1186 				    u32 vdev_id)
1187 {
1188 	struct ieee80211_channel *ch;
1189 
1190 	spin_lock_bh(&ar->data_lock);
1191 	ch = ar->scan_channel;
1192 	if (!ch)
1193 		ch = ar->rx_channel;
1194 	if (!ch)
1195 		ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
1196 	if (!ch)
1197 		ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
1198 	if (!ch)
1199 		ch = ath10k_htt_rx_h_any_channel(ar);
1200 	if (!ch)
1201 		ch = ar->tgt_oper_chan;
1202 	spin_unlock_bh(&ar->data_lock);
1203 
1204 	if (!ch)
1205 		return false;
1206 
1207 	status->band = ch->band;
1208 	status->freq = ch->center_freq;
1209 
1210 	return true;
1211 }
1212 
ath10k_htt_rx_h_signal(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)1213 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
1214 				   struct ieee80211_rx_status *status,
1215 				   struct htt_rx_desc *rxd)
1216 {
1217 	struct ath10k_hw_params *hw = &ar->hw_params;
1218 	struct rx_ppdu_start *rxd_ppdu_start = ath10k_htt_rx_desc_get_ppdu_start(hw, rxd);
1219 	int i;
1220 
1221 	for (i = 0; i < IEEE80211_MAX_CHAINS ; i++) {
1222 		status->chains &= ~BIT(i);
1223 
1224 		if (rxd_ppdu_start->rssi_chains[i].pri20_mhz != 0x80) {
1225 			status->chain_signal[i] = ATH10K_DEFAULT_NOISE_FLOOR +
1226 				rxd_ppdu_start->rssi_chains[i].pri20_mhz;
1227 
1228 			status->chains |= BIT(i);
1229 		}
1230 	}
1231 
1232 	/* FIXME: Get real NF */
1233 	status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
1234 			 rxd_ppdu_start->rssi_comb;
1235 	status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
1236 }
1237 
ath10k_htt_rx_h_mactime(struct ath10k * ar,struct ieee80211_rx_status * status,struct htt_rx_desc * rxd)1238 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
1239 				    struct ieee80211_rx_status *status,
1240 				    struct htt_rx_desc *rxd)
1241 {
1242 	struct ath10k_hw_params *hw = &ar->hw_params;
1243 	struct rx_ppdu_end_common *rxd_ppdu_end_common;
1244 
1245 	rxd_ppdu_end_common = ath10k_htt_rx_desc_get_ppdu_end(hw, rxd);
1246 
1247 	/* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
1248 	 * means all prior MSDUs in a PPDU are reported to mac80211 without the
1249 	 * TSF. Is it worth holding frames until end of PPDU is known?
1250 	 *
1251 	 * FIXME: Can we get/compute 64bit TSF?
1252 	 */
1253 	status->mactime = __le32_to_cpu(rxd_ppdu_end_common->tsf_timestamp);
1254 	status->flag |= RX_FLAG_MACTIME_END;
1255 }
1256 
ath10k_htt_rx_h_ppdu(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * status,u32 vdev_id)1257 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
1258 				 struct sk_buff_head *amsdu,
1259 				 struct ieee80211_rx_status *status,
1260 				 u32 vdev_id)
1261 {
1262 	struct sk_buff *first;
1263 	struct ath10k_hw_params *hw = &ar->hw_params;
1264 	struct htt_rx_desc *rxd;
1265 	struct rx_attention *rxd_attention;
1266 	bool is_first_ppdu;
1267 	bool is_last_ppdu;
1268 
1269 	if (skb_queue_empty(amsdu))
1270 		return;
1271 
1272 	first = skb_peek(amsdu);
1273 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1274 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
1275 
1276 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1277 
1278 	is_first_ppdu = !!(rxd_attention->flags &
1279 			   __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
1280 	is_last_ppdu = !!(rxd_attention->flags &
1281 			  __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
1282 
1283 	if (is_first_ppdu) {
1284 		/* New PPDU starts so clear out the old per-PPDU status. */
1285 		status->freq = 0;
1286 		status->rate_idx = 0;
1287 		status->nss = 0;
1288 		status->encoding = RX_ENC_LEGACY;
1289 		status->bw = RATE_INFO_BW_20;
1290 
1291 		status->flag &= ~RX_FLAG_MACTIME_END;
1292 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1293 
1294 		status->flag &= ~(RX_FLAG_AMPDU_IS_LAST);
1295 		status->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN;
1296 		status->ampdu_reference = ar->ampdu_reference;
1297 
1298 		ath10k_htt_rx_h_signal(ar, status, rxd);
1299 		ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
1300 		ath10k_htt_rx_h_rates(ar, status, rxd);
1301 	}
1302 
1303 	if (is_last_ppdu) {
1304 		ath10k_htt_rx_h_mactime(ar, status, rxd);
1305 
1306 		/* set ampdu last segment flag */
1307 		status->flag |= RX_FLAG_AMPDU_IS_LAST;
1308 		ar->ampdu_reference++;
1309 	}
1310 }
1311 
1312 static const char * const tid_to_ac[] = {
1313 	"BE",
1314 	"BK",
1315 	"BK",
1316 	"BE",
1317 	"VI",
1318 	"VI",
1319 	"VO",
1320 	"VO",
1321 };
1322 
ath10k_get_tid(struct ieee80211_hdr * hdr,char * out,size_t size)1323 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
1324 {
1325 	u8 *qc;
1326 	int tid;
1327 
1328 	if (!ieee80211_is_data_qos(hdr->frame_control))
1329 		return "";
1330 
1331 	qc = ieee80211_get_qos_ctl(hdr);
1332 	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1333 	if (tid < 8)
1334 		snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
1335 	else
1336 		snprintf(out, size, "tid %d", tid);
1337 
1338 	return out;
1339 }
1340 
ath10k_htt_rx_h_queue_msdu(struct ath10k * ar,struct ieee80211_rx_status * rx_status,struct sk_buff * skb)1341 static void ath10k_htt_rx_h_queue_msdu(struct ath10k *ar,
1342 				       struct ieee80211_rx_status *rx_status,
1343 				       struct sk_buff *skb)
1344 {
1345 	struct ieee80211_rx_status *status;
1346 
1347 	status = IEEE80211_SKB_RXCB(skb);
1348 	*status = *rx_status;
1349 
1350 	skb_queue_tail(&ar->htt.rx_msdus_q, skb);
1351 }
1352 
ath10k_process_rx(struct ath10k * ar,struct sk_buff * skb)1353 static void ath10k_process_rx(struct ath10k *ar, struct sk_buff *skb)
1354 {
1355 	struct ieee80211_rx_status *status;
1356 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1357 	char tid[32];
1358 
1359 	status = IEEE80211_SKB_RXCB(skb);
1360 
1361 	if (!(ar->filter_flags & FIF_FCSFAIL) &&
1362 	    status->flag & RX_FLAG_FAILED_FCS_CRC) {
1363 		ar->stats.rx_crc_err_drop++;
1364 		dev_kfree_skb_any(skb);
1365 		return;
1366 	}
1367 
1368 	ath10k_dbg(ar, ATH10K_DBG_DATA,
1369 		   "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",
1370 		   skb,
1371 		   skb->len,
1372 		   ieee80211_get_SA(hdr),
1373 		   ath10k_get_tid(hdr, tid, sizeof(tid)),
1374 		   is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
1375 							"mcast" : "ucast",
1376 		   (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
1377 		   (status->encoding == RX_ENC_LEGACY) ? "legacy" : "",
1378 		   (status->encoding == RX_ENC_HT) ? "ht" : "",
1379 		   (status->encoding == RX_ENC_VHT) ? "vht" : "",
1380 		   (status->bw == RATE_INFO_BW_40) ? "40" : "",
1381 		   (status->bw == RATE_INFO_BW_80) ? "80" : "",
1382 		   (status->bw == RATE_INFO_BW_160) ? "160" : "",
1383 		   status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "",
1384 		   status->rate_idx,
1385 		   status->nss,
1386 		   status->freq,
1387 		   status->band, status->flag,
1388 		   !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1389 		   !!(status->flag & RX_FLAG_MMIC_ERROR),
1390 		   !!(status->flag & RX_FLAG_AMSDU_MORE));
1391 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1392 			skb->data, skb->len);
1393 	trace_ath10k_rx_hdr(ar, skb->data, skb->len);
1394 	trace_ath10k_rx_payload(ar, skb->data, skb->len);
1395 
1396 	ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
1397 }
1398 
ath10k_htt_rx_nwifi_hdrlen(struct ath10k * ar,struct ieee80211_hdr * hdr)1399 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
1400 				      struct ieee80211_hdr *hdr)
1401 {
1402 	int len = ieee80211_hdrlen(hdr->frame_control);
1403 
1404 	if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
1405 		      ar->running_fw->fw_file.fw_features))
1406 		len = round_up(len, 4);
1407 
1408 	return len;
1409 }
1410 
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])1411 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
1412 					struct sk_buff *msdu,
1413 					struct ieee80211_rx_status *status,
1414 					enum htt_rx_mpdu_encrypt_type enctype,
1415 					bool is_decrypted,
1416 					const u8 first_hdr[64])
1417 {
1418 	struct ieee80211_hdr *hdr;
1419 	struct ath10k_hw_params *hw = &ar->hw_params;
1420 	struct htt_rx_desc *rxd;
1421 	struct rx_msdu_end_common *rxd_msdu_end_common;
1422 	size_t hdr_len;
1423 	size_t crypto_len;
1424 	bool is_first;
1425 	bool is_last;
1426 	bool msdu_limit_err;
1427 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1428 	u8 *qos;
1429 
1430 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1431 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1432 
1433 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1434 	is_first = !!(rxd_msdu_end_common->info0 &
1435 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1436 	is_last = !!(rxd_msdu_end_common->info0 &
1437 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1438 
1439 	/* Delivered decapped frame:
1440 	 * [802.11 header]
1441 	 * [crypto param] <-- can be trimmed if !fcs_err &&
1442 	 *                    !decrypt_err && !peer_idx_invalid
1443 	 * [amsdu header] <-- only if A-MSDU
1444 	 * [rfc1042/llc]
1445 	 * [payload]
1446 	 * [FCS] <-- at end, needs to be trimmed
1447 	 */
1448 
1449 	/* Some hardwares(QCA99x0 variants) limit number of msdus in a-msdu when
1450 	 * deaggregate, so that unwanted MSDU-deaggregation is avoided for
1451 	 * error packets. If limit exceeds, hw sends all remaining MSDUs as
1452 	 * a single last MSDU with this msdu limit error set.
1453 	 */
1454 	msdu_limit_err = ath10k_htt_rx_desc_msdu_limit_error(hw, rxd);
1455 
1456 	/* If MSDU limit error happens, then don't warn on, the partial raw MSDU
1457 	 * without first MSDU is expected in that case, and handled later here.
1458 	 */
1459 	/* This probably shouldn't happen but warn just in case */
1460 	if (WARN_ON_ONCE(!is_first && !msdu_limit_err))
1461 		return;
1462 
1463 	/* This probably shouldn't happen but warn just in case */
1464 	if (WARN_ON_ONCE(!(is_first && is_last) && !msdu_limit_err))
1465 		return;
1466 
1467 	skb_trim(msdu, msdu->len - FCS_LEN);
1468 
1469 	/* Push original 80211 header */
1470 	if (unlikely(msdu_limit_err)) {
1471 		hdr = (struct ieee80211_hdr *)first_hdr;
1472 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1473 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1474 
1475 		if (ieee80211_is_data_qos(hdr->frame_control)) {
1476 			qos = ieee80211_get_qos_ctl(hdr);
1477 			qos[0] |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1478 		}
1479 
1480 		if (crypto_len)
1481 			memcpy(skb_push(msdu, crypto_len),
1482 			       (void *)hdr + round_up(hdr_len, bytes_aligned),
1483 			       crypto_len);
1484 
1485 		memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1486 	}
1487 
1488 	/* In most cases this will be true for sniffed frames. It makes sense
1489 	 * to deliver them as-is without stripping the crypto param. This is
1490 	 * necessary for software based decryption.
1491 	 *
1492 	 * If there's no error then the frame is decrypted. At least that is
1493 	 * the case for frames that come in via fragmented rx indication.
1494 	 */
1495 	if (!is_decrypted)
1496 		return;
1497 
1498 	/* The payload is decrypted so strip crypto params. Start from tail
1499 	 * since hdr is used to compute some stuff.
1500 	 */
1501 
1502 	hdr = (void *)msdu->data;
1503 
1504 	/* Tail */
1505 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1506 		skb_trim(msdu, msdu->len -
1507 			 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1508 
1509 		skb_trim(msdu, msdu->len -
1510 			 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1511 	} else {
1512 		/* MIC */
1513 		if (status->flag & RX_FLAG_MIC_STRIPPED)
1514 			skb_trim(msdu, msdu->len -
1515 				 ath10k_htt_rx_crypto_mic_len(ar, enctype));
1516 
1517 		/* ICV */
1518 		if (status->flag & RX_FLAG_ICV_STRIPPED)
1519 			skb_trim(msdu, msdu->len -
1520 				 ath10k_htt_rx_crypto_icv_len(ar, enctype));
1521 	}
1522 
1523 	/* MMIC */
1524 	if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1525 	    !ieee80211_has_morefrags(hdr->frame_control) &&
1526 	    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1527 		skb_trim(msdu, msdu->len - MICHAEL_MIC_LEN);
1528 
1529 	/* Head */
1530 	if (status->flag & RX_FLAG_IV_STRIPPED) {
1531 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1532 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1533 
1534 		memmove((void *)msdu->data + crypto_len,
1535 			(void *)msdu->data, hdr_len);
1536 		skb_pull(msdu, crypto_len);
1537 	}
1538 }
1539 
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)1540 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1541 					  struct sk_buff *msdu,
1542 					  struct ieee80211_rx_status *status,
1543 					  const u8 first_hdr[64],
1544 					  enum htt_rx_mpdu_encrypt_type enctype)
1545 {
1546 	struct ath10k_hw_params *hw = &ar->hw_params;
1547 	struct ieee80211_hdr *hdr;
1548 	struct htt_rx_desc *rxd;
1549 	size_t hdr_len;
1550 	u8 da[ETH_ALEN];
1551 	u8 sa[ETH_ALEN];
1552 	int l3_pad_bytes;
1553 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1554 
1555 	/* Delivered decapped frame:
1556 	 * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1557 	 * [rfc1042/llc]
1558 	 *
1559 	 * Note: The nwifi header doesn't have QoS Control and is
1560 	 * (always?) a 3addr frame.
1561 	 *
1562 	 * Note2: There's no A-MSDU subframe header. Even if it's part
1563 	 * of an A-MSDU.
1564 	 */
1565 
1566 	/* pull decapped header and copy SA & DA */
1567 	rxd = HTT_RX_BUF_TO_RX_DESC(hw, (void *)msdu->data -
1568 				    hw->rx_desc_ops->rx_desc_size);
1569 
1570 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1571 	skb_put(msdu, l3_pad_bytes);
1572 
1573 	hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes);
1574 
1575 	hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1576 	ether_addr_copy(da, ieee80211_get_DA(hdr));
1577 	ether_addr_copy(sa, ieee80211_get_SA(hdr));
1578 	skb_pull(msdu, hdr_len);
1579 
1580 	/* push original 802.11 header */
1581 	hdr = (struct ieee80211_hdr *)first_hdr;
1582 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1583 
1584 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1585 		memcpy(skb_push(msdu,
1586 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1587 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1588 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1589 	}
1590 
1591 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1592 
1593 	/* original 802.11 header has a different DA and in
1594 	 * case of 4addr it may also have different SA
1595 	 */
1596 	hdr = (struct ieee80211_hdr *)msdu->data;
1597 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1598 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1599 }
1600 
ath10k_htt_rx_h_find_rfc1042(struct ath10k * ar,struct sk_buff * msdu,enum htt_rx_mpdu_encrypt_type enctype)1601 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1602 					  struct sk_buff *msdu,
1603 					  enum htt_rx_mpdu_encrypt_type enctype)
1604 {
1605 	struct ieee80211_hdr *hdr;
1606 	struct ath10k_hw_params *hw = &ar->hw_params;
1607 	struct htt_rx_desc *rxd;
1608 	struct rx_msdu_end_common *rxd_msdu_end_common;
1609 	u8 *rxd_rx_hdr_status;
1610 	size_t hdr_len, crypto_len;
1611 	void *rfc1042;
1612 	bool is_first, is_last, is_amsdu;
1613 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1614 
1615 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1616 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1617 
1618 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
1619 	rxd_rx_hdr_status = ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
1620 	hdr = (void *)rxd_rx_hdr_status;
1621 
1622 	is_first = !!(rxd_msdu_end_common->info0 &
1623 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1624 	is_last = !!(rxd_msdu_end_common->info0 &
1625 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1626 	is_amsdu = !(is_first && is_last);
1627 
1628 	rfc1042 = hdr;
1629 
1630 	if (is_first) {
1631 		hdr_len = ieee80211_hdrlen(hdr->frame_control);
1632 		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1633 
1634 		rfc1042 += round_up(hdr_len, bytes_aligned) +
1635 			   round_up(crypto_len, bytes_aligned);
1636 	}
1637 
1638 	if (is_amsdu)
1639 		rfc1042 += sizeof(struct amsdu_subframe_hdr);
1640 
1641 	return rfc1042;
1642 }
1643 
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)1644 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1645 					struct sk_buff *msdu,
1646 					struct ieee80211_rx_status *status,
1647 					const u8 first_hdr[64],
1648 					enum htt_rx_mpdu_encrypt_type enctype)
1649 {
1650 	struct ath10k_hw_params *hw = &ar->hw_params;
1651 	struct ieee80211_hdr *hdr;
1652 	struct ethhdr *eth;
1653 	size_t hdr_len;
1654 	void *rfc1042;
1655 	u8 da[ETH_ALEN];
1656 	u8 sa[ETH_ALEN];
1657 	int l3_pad_bytes;
1658 	struct htt_rx_desc *rxd;
1659 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1660 
1661 	/* Delivered decapped frame:
1662 	 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1663 	 * [payload]
1664 	 */
1665 
1666 	rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1667 	if (WARN_ON_ONCE(!rfc1042))
1668 		return;
1669 
1670 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1671 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1672 
1673 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1674 	skb_put(msdu, l3_pad_bytes);
1675 	skb_pull(msdu, l3_pad_bytes);
1676 
1677 	/* pull decapped header and copy SA & DA */
1678 	eth = (struct ethhdr *)msdu->data;
1679 	ether_addr_copy(da, eth->h_dest);
1680 	ether_addr_copy(sa, eth->h_source);
1681 	skb_pull(msdu, sizeof(struct ethhdr));
1682 
1683 	/* push rfc1042/llc/snap */
1684 	memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1685 	       sizeof(struct rfc1042_hdr));
1686 
1687 	/* push original 802.11 header */
1688 	hdr = (struct ieee80211_hdr *)first_hdr;
1689 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1690 
1691 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1692 		memcpy(skb_push(msdu,
1693 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1694 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1695 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1696 	}
1697 
1698 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1699 
1700 	/* original 802.11 header has a different DA and in
1701 	 * case of 4addr it may also have different SA
1702 	 */
1703 	hdr = (struct ieee80211_hdr *)msdu->data;
1704 	ether_addr_copy(ieee80211_get_DA(hdr), da);
1705 	ether_addr_copy(ieee80211_get_SA(hdr), sa);
1706 }
1707 
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)1708 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1709 					 struct sk_buff *msdu,
1710 					 struct ieee80211_rx_status *status,
1711 					 const u8 first_hdr[64],
1712 					 enum htt_rx_mpdu_encrypt_type enctype)
1713 {
1714 	struct ath10k_hw_params *hw = &ar->hw_params;
1715 	struct ieee80211_hdr *hdr;
1716 	size_t hdr_len;
1717 	int l3_pad_bytes;
1718 	struct htt_rx_desc *rxd;
1719 	int bytes_aligned = ar->hw_params.decap_align_bytes;
1720 
1721 	/* Delivered decapped frame:
1722 	 * [amsdu header] <-- replaced with 802.11 hdr
1723 	 * [rfc1042/llc]
1724 	 * [payload]
1725 	 */
1726 
1727 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1728 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1729 
1730 	l3_pad_bytes = ath10k_htt_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1731 
1732 	skb_put(msdu, l3_pad_bytes);
1733 	skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes);
1734 
1735 	hdr = (struct ieee80211_hdr *)first_hdr;
1736 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
1737 
1738 	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
1739 		memcpy(skb_push(msdu,
1740 				ath10k_htt_rx_crypto_param_len(ar, enctype)),
1741 		       (void *)hdr + round_up(hdr_len, bytes_aligned),
1742 			ath10k_htt_rx_crypto_param_len(ar, enctype));
1743 	}
1744 
1745 	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1746 }
1747 
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)1748 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1749 				    struct sk_buff *msdu,
1750 				    struct ieee80211_rx_status *status,
1751 				    u8 first_hdr[64],
1752 				    enum htt_rx_mpdu_encrypt_type enctype,
1753 				    bool is_decrypted)
1754 {
1755 	struct ath10k_hw_params *hw = &ar->hw_params;
1756 	struct htt_rx_desc *rxd;
1757 	struct rx_msdu_start_common *rxd_msdu_start_common;
1758 	enum rx_msdu_decap_format decap;
1759 
1760 	/* First msdu's decapped header:
1761 	 * [802.11 header] <-- padded to 4 bytes long
1762 	 * [crypto param] <-- padded to 4 bytes long
1763 	 * [amsdu header] <-- only if A-MSDU
1764 	 * [rfc1042/llc]
1765 	 *
1766 	 * Other (2nd, 3rd, ..) msdu's decapped header:
1767 	 * [amsdu header] <-- only if A-MSDU
1768 	 * [rfc1042/llc]
1769 	 */
1770 
1771 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1772 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
1773 
1774 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
1775 	decap = MS(__le32_to_cpu(rxd_msdu_start_common->info1),
1776 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
1777 
1778 	switch (decap) {
1779 	case RX_MSDU_DECAP_RAW:
1780 		ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1781 					    is_decrypted, first_hdr);
1782 		break;
1783 	case RX_MSDU_DECAP_NATIVE_WIFI:
1784 		ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
1785 					      enctype);
1786 		break;
1787 	case RX_MSDU_DECAP_ETHERNET2_DIX:
1788 		ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1789 		break;
1790 	case RX_MSDU_DECAP_8023_SNAP_LLC:
1791 		ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr,
1792 					     enctype);
1793 		break;
1794 	}
1795 }
1796 
ath10k_htt_rx_get_csum_state(struct ath10k_hw_params * hw,struct sk_buff * skb)1797 static int ath10k_htt_rx_get_csum_state(struct ath10k_hw_params *hw, struct sk_buff *skb)
1798 {
1799 	struct htt_rx_desc *rxd;
1800 	struct rx_attention *rxd_attention;
1801 	struct rx_msdu_start_common *rxd_msdu_start_common;
1802 	u32 flags, info;
1803 	bool is_ip4, is_ip6;
1804 	bool is_tcp, is_udp;
1805 	bool ip_csum_ok, tcpudp_csum_ok;
1806 
1807 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1808 				    (void *)skb->data - hw->rx_desc_ops->rx_desc_size);
1809 
1810 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1811 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
1812 	flags = __le32_to_cpu(rxd_attention->flags);
1813 	info = __le32_to_cpu(rxd_msdu_start_common->info1);
1814 
1815 	is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1816 	is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1817 	is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1818 	is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1819 	ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1820 	tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1821 
1822 	if (!is_ip4 && !is_ip6)
1823 		return CHECKSUM_NONE;
1824 	if (!is_tcp && !is_udp)
1825 		return CHECKSUM_NONE;
1826 	if (!ip_csum_ok)
1827 		return CHECKSUM_NONE;
1828 	if (!tcpudp_csum_ok)
1829 		return CHECKSUM_NONE;
1830 
1831 	return CHECKSUM_UNNECESSARY;
1832 }
1833 
ath10k_htt_rx_h_csum_offload(struct ath10k_hw_params * hw,struct sk_buff * msdu)1834 static void ath10k_htt_rx_h_csum_offload(struct ath10k_hw_params *hw,
1835 					 struct sk_buff *msdu)
1836 {
1837 	msdu->ip_summed = ath10k_htt_rx_get_csum_state(hw, msdu);
1838 }
1839 
ath10k_htt_rx_h_get_pn(struct ath10k * ar,struct sk_buff * skb,u16 offset,enum htt_rx_mpdu_encrypt_type enctype)1840 static u64 ath10k_htt_rx_h_get_pn(struct ath10k *ar, struct sk_buff *skb,
1841 				  u16 offset,
1842 				  enum htt_rx_mpdu_encrypt_type enctype)
1843 {
1844 	struct ieee80211_hdr *hdr;
1845 	u64 pn = 0;
1846 	u8 *ehdr;
1847 
1848 	hdr = (struct ieee80211_hdr *)(skb->data + offset);
1849 	ehdr = skb->data + offset + ieee80211_hdrlen(hdr->frame_control);
1850 
1851 	if (enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2) {
1852 		pn = ehdr[0];
1853 		pn |= (u64)ehdr[1] << 8;
1854 		pn |= (u64)ehdr[4] << 16;
1855 		pn |= (u64)ehdr[5] << 24;
1856 		pn |= (u64)ehdr[6] << 32;
1857 		pn |= (u64)ehdr[7] << 40;
1858 	}
1859 	return pn;
1860 }
1861 
ath10k_htt_rx_h_frag_multicast_check(struct ath10k * ar,struct sk_buff * skb,u16 offset)1862 static bool ath10k_htt_rx_h_frag_multicast_check(struct ath10k *ar,
1863 						 struct sk_buff *skb,
1864 						 u16 offset)
1865 {
1866 	struct ieee80211_hdr *hdr;
1867 
1868 	hdr = (struct ieee80211_hdr *)(skb->data + offset);
1869 	return !is_multicast_ether_addr(hdr->addr1);
1870 }
1871 
ath10k_htt_rx_h_frag_pn_check(struct ath10k * ar,struct sk_buff * skb,u16 peer_id,u16 offset,enum htt_rx_mpdu_encrypt_type enctype)1872 static bool ath10k_htt_rx_h_frag_pn_check(struct ath10k *ar,
1873 					  struct sk_buff *skb,
1874 					  u16 peer_id,
1875 					  u16 offset,
1876 					  enum htt_rx_mpdu_encrypt_type enctype)
1877 {
1878 	struct ath10k_peer *peer;
1879 	union htt_rx_pn_t *last_pn, new_pn = {0};
1880 	struct ieee80211_hdr *hdr;
1881 	u8 tid, frag_number;
1882 	u32 seq;
1883 
1884 	peer = ath10k_peer_find_by_id(ar, peer_id);
1885 	if (!peer) {
1886 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer for frag pn check\n");
1887 		return false;
1888 	}
1889 
1890 	hdr = (struct ieee80211_hdr *)(skb->data + offset);
1891 	if (ieee80211_is_data_qos(hdr->frame_control))
1892 		tid = ieee80211_get_tid(hdr);
1893 	else
1894 		tid = ATH10K_TXRX_NON_QOS_TID;
1895 
1896 	last_pn = &peer->frag_tids_last_pn[tid];
1897 	new_pn.pn48 = ath10k_htt_rx_h_get_pn(ar, skb, offset, enctype);
1898 	frag_number = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1899 	seq = (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;
1900 
1901 	if (frag_number == 0) {
1902 		last_pn->pn48 = new_pn.pn48;
1903 		peer->frag_tids_seq[tid] = seq;
1904 	} else {
1905 		if (seq != peer->frag_tids_seq[tid])
1906 			return false;
1907 
1908 		if (new_pn.pn48 != last_pn->pn48 + 1)
1909 			return false;
1910 
1911 		last_pn->pn48 = new_pn.pn48;
1912 	}
1913 
1914 	return true;
1915 }
1916 
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)1917 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1918 				 struct sk_buff_head *amsdu,
1919 				 struct ieee80211_rx_status *status,
1920 				 bool fill_crypt_header,
1921 				 u8 *rx_hdr,
1922 				 enum ath10k_pkt_rx_err *err,
1923 				 u16 peer_id,
1924 				 bool frag)
1925 {
1926 	struct sk_buff *first;
1927 	struct sk_buff *last;
1928 	struct sk_buff *msdu, *temp;
1929 	struct ath10k_hw_params *hw = &ar->hw_params;
1930 	struct htt_rx_desc *rxd;
1931 	struct rx_attention *rxd_attention;
1932 	struct rx_mpdu_start *rxd_mpdu_start;
1933 
1934 	struct ieee80211_hdr *hdr;
1935 	enum htt_rx_mpdu_encrypt_type enctype;
1936 	u8 first_hdr[64];
1937 	u8 *qos;
1938 	bool has_fcs_err;
1939 	bool has_crypto_err;
1940 	bool has_tkip_err;
1941 	bool has_peer_idx_invalid;
1942 	bool is_decrypted;
1943 	bool is_mgmt;
1944 	u32 attention;
1945 	bool frag_pn_check = true, multicast_check = true;
1946 
1947 	if (skb_queue_empty(amsdu))
1948 		return;
1949 
1950 	first = skb_peek(amsdu);
1951 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1952 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
1953 
1954 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1955 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
1956 
1957 	is_mgmt = !!(rxd_attention->flags &
1958 		     __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1959 
1960 	enctype = MS(__le32_to_cpu(rxd_mpdu_start->info0),
1961 		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1962 
1963 	/* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1964 	 * decapped header. It'll be used for undecapping of each MSDU.
1965 	 */
1966 	hdr = (void *)ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
1967 	memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1968 
1969 	if (rx_hdr)
1970 		memcpy(rx_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
1971 
1972 	/* Each A-MSDU subframe will use the original header as the base and be
1973 	 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1974 	 */
1975 	hdr = (void *)first_hdr;
1976 
1977 	if (ieee80211_is_data_qos(hdr->frame_control)) {
1978 		qos = ieee80211_get_qos_ctl(hdr);
1979 		qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1980 	}
1981 
1982 	/* Some attention flags are valid only in the last MSDU. */
1983 	last = skb_peek_tail(amsdu);
1984 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
1985 				    (void *)last->data - hw->rx_desc_ops->rx_desc_size);
1986 
1987 	rxd_attention = ath10k_htt_rx_desc_get_attention(hw, rxd);
1988 	attention = __le32_to_cpu(rxd_attention->flags);
1989 
1990 	has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1991 	has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1992 	has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1993 	has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1994 
1995 	/* Note: If hardware captures an encrypted frame that it can't decrypt,
1996 	 * e.g. due to fcs error, missing peer or invalid key data it will
1997 	 * report the frame as raw.
1998 	 */
1999 	is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
2000 			!has_fcs_err &&
2001 			!has_crypto_err &&
2002 			!has_peer_idx_invalid);
2003 
2004 	/* Clear per-MPDU flags while leaving per-PPDU flags intact. */
2005 	status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
2006 			  RX_FLAG_MMIC_ERROR |
2007 			  RX_FLAG_DECRYPTED |
2008 			  RX_FLAG_IV_STRIPPED |
2009 			  RX_FLAG_ONLY_MONITOR |
2010 			  RX_FLAG_MMIC_STRIPPED);
2011 
2012 	if (has_fcs_err)
2013 		status->flag |= RX_FLAG_FAILED_FCS_CRC;
2014 
2015 	if (has_tkip_err)
2016 		status->flag |= RX_FLAG_MMIC_ERROR;
2017 
2018 	if (err) {
2019 		if (has_fcs_err)
2020 			*err = ATH10K_PKT_RX_ERR_FCS;
2021 		else if (has_tkip_err)
2022 			*err = ATH10K_PKT_RX_ERR_TKIP;
2023 		else if (has_crypto_err)
2024 			*err = ATH10K_PKT_RX_ERR_CRYPT;
2025 		else if (has_peer_idx_invalid)
2026 			*err = ATH10K_PKT_RX_ERR_PEER_IDX_INVAL;
2027 	}
2028 
2029 	/* Firmware reports all necessary management frames via WMI already.
2030 	 * They are not reported to monitor interfaces at all so pass the ones
2031 	 * coming via HTT to monitor interfaces instead. This simplifies
2032 	 * matters a lot.
2033 	 */
2034 	if (is_mgmt)
2035 		status->flag |= RX_FLAG_ONLY_MONITOR;
2036 
2037 	if (is_decrypted) {
2038 		status->flag |= RX_FLAG_DECRYPTED;
2039 
2040 		if (likely(!is_mgmt))
2041 			status->flag |= RX_FLAG_MMIC_STRIPPED;
2042 
2043 		if (fill_crypt_header)
2044 			status->flag |= RX_FLAG_MIC_STRIPPED |
2045 					RX_FLAG_ICV_STRIPPED;
2046 		else
2047 			status->flag |= RX_FLAG_IV_STRIPPED;
2048 	}
2049 
2050 	skb_queue_walk(amsdu, msdu) {
2051 		if (frag && !fill_crypt_header && is_decrypted &&
2052 		    enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2)
2053 			frag_pn_check = ath10k_htt_rx_h_frag_pn_check(ar,
2054 								      msdu,
2055 								      peer_id,
2056 								      0,
2057 								      enctype);
2058 
2059 		if (frag)
2060 			multicast_check = ath10k_htt_rx_h_frag_multicast_check(ar,
2061 									       msdu,
2062 									       0);
2063 
2064 		if (!frag_pn_check || !multicast_check) {
2065 			/* Discard the fragment with invalid PN or multicast DA
2066 			 */
2067 			temp = msdu->prev;
2068 			__skb_unlink(msdu, amsdu);
2069 			dev_kfree_skb_any(msdu);
2070 			msdu = temp;
2071 			frag_pn_check = true;
2072 			multicast_check = true;
2073 			continue;
2074 		}
2075 
2076 		ath10k_htt_rx_h_csum_offload(&ar->hw_params, msdu);
2077 
2078 		if (frag && !fill_crypt_header &&
2079 		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
2080 			status->flag &= ~RX_FLAG_MMIC_STRIPPED;
2081 
2082 		ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
2083 					is_decrypted);
2084 
2085 		/* Undecapping involves copying the original 802.11 header back
2086 		 * to sk_buff. If frame is protected and hardware has decrypted
2087 		 * it then remove the protected bit.
2088 		 */
2089 		if (!is_decrypted)
2090 			continue;
2091 		if (is_mgmt)
2092 			continue;
2093 
2094 		if (fill_crypt_header)
2095 			continue;
2096 
2097 		hdr = (void *)msdu->data;
2098 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2099 
2100 		if (frag && !fill_crypt_header &&
2101 		    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
2102 			status->flag &= ~RX_FLAG_IV_STRIPPED &
2103 					~RX_FLAG_MMIC_STRIPPED;
2104 	}
2105 }
2106 
ath10k_htt_rx_h_enqueue(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * status)2107 static void ath10k_htt_rx_h_enqueue(struct ath10k *ar,
2108 				    struct sk_buff_head *amsdu,
2109 				    struct ieee80211_rx_status *status)
2110 {
2111 	struct sk_buff *msdu;
2112 	struct sk_buff *first_subframe;
2113 
2114 	first_subframe = skb_peek(amsdu);
2115 
2116 	while ((msdu = __skb_dequeue(amsdu))) {
2117 		/* Setup per-MSDU flags */
2118 		if (skb_queue_empty(amsdu))
2119 			status->flag &= ~RX_FLAG_AMSDU_MORE;
2120 		else
2121 			status->flag |= RX_FLAG_AMSDU_MORE;
2122 
2123 		if (msdu == first_subframe) {
2124 			first_subframe = NULL;
2125 			status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
2126 		} else {
2127 			status->flag |= RX_FLAG_ALLOW_SAME_PN;
2128 		}
2129 
2130 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
2131 	}
2132 }
2133 
ath10k_unchain_msdu(struct sk_buff_head * amsdu,unsigned long * unchain_cnt)2134 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu,
2135 			       unsigned long *unchain_cnt)
2136 {
2137 	struct sk_buff *skb, *first;
2138 	int space;
2139 	int total_len = 0;
2140 	int amsdu_len = skb_queue_len(amsdu);
2141 
2142 	/* TODO:  Might could optimize this by using
2143 	 * skb_try_coalesce or similar method to
2144 	 * decrease copying, or maybe get mac80211 to
2145 	 * provide a way to just receive a list of
2146 	 * skb?
2147 	 */
2148 
2149 	first = __skb_dequeue(amsdu);
2150 
2151 	/* Allocate total length all at once. */
2152 	skb_queue_walk(amsdu, skb)
2153 		total_len += skb->len;
2154 
2155 	space = total_len - skb_tailroom(first);
2156 	if ((space > 0) &&
2157 	    (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
2158 		/* TODO:  bump some rx-oom error stat */
2159 		/* put it back together so we can free the
2160 		 * whole list at once.
2161 		 */
2162 		__skb_queue_head(amsdu, first);
2163 		return -1;
2164 	}
2165 
2166 	/* Walk list again, copying contents into
2167 	 * msdu_head
2168 	 */
2169 	while ((skb = __skb_dequeue(amsdu))) {
2170 		skb_copy_from_linear_data(skb, skb_put(first, skb->len),
2171 					  skb->len);
2172 		dev_kfree_skb_any(skb);
2173 	}
2174 
2175 	__skb_queue_head(amsdu, first);
2176 
2177 	*unchain_cnt += amsdu_len - 1;
2178 
2179 	return 0;
2180 }
2181 
ath10k_htt_rx_h_unchain(struct ath10k * ar,struct sk_buff_head * amsdu,unsigned long * drop_cnt,unsigned long * unchain_cnt)2182 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
2183 				    struct sk_buff_head *amsdu,
2184 				    unsigned long *drop_cnt,
2185 				    unsigned long *unchain_cnt)
2186 {
2187 	struct sk_buff *first;
2188 	struct ath10k_hw_params *hw = &ar->hw_params;
2189 	struct htt_rx_desc *rxd;
2190 	struct rx_msdu_start_common *rxd_msdu_start_common;
2191 	struct rx_frag_info_common *rxd_frag_info;
2192 	enum rx_msdu_decap_format decap;
2193 
2194 	first = skb_peek(amsdu);
2195 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
2196 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
2197 
2198 	rxd_msdu_start_common = ath10k_htt_rx_desc_get_msdu_start(hw, rxd);
2199 	rxd_frag_info = ath10k_htt_rx_desc_get_frag_info(hw, rxd);
2200 	decap = MS(__le32_to_cpu(rxd_msdu_start_common->info1),
2201 		   RX_MSDU_START_INFO1_DECAP_FORMAT);
2202 
2203 	/* FIXME: Current unchaining logic can only handle simple case of raw
2204 	 * msdu chaining. If decapping is other than raw the chaining may be
2205 	 * more complex and this isn't handled by the current code. Don't even
2206 	 * try re-constructing such frames - it'll be pretty much garbage.
2207 	 */
2208 	if (decap != RX_MSDU_DECAP_RAW ||
2209 	    skb_queue_len(amsdu) != 1 + rxd_frag_info->ring2_more_count) {
2210 		*drop_cnt += skb_queue_len(amsdu);
2211 		__skb_queue_purge(amsdu);
2212 		return;
2213 	}
2214 
2215 	ath10k_unchain_msdu(amsdu, unchain_cnt);
2216 }
2217 
ath10k_htt_rx_validate_amsdu(struct ath10k * ar,struct sk_buff_head * amsdu)2218 static bool ath10k_htt_rx_validate_amsdu(struct ath10k *ar,
2219 					 struct sk_buff_head *amsdu)
2220 {
2221 	u8 *subframe_hdr;
2222 	struct sk_buff *first;
2223 	bool is_first, is_last;
2224 	struct ath10k_hw_params *hw = &ar->hw_params;
2225 	struct htt_rx_desc *rxd;
2226 	struct rx_msdu_end_common *rxd_msdu_end_common;
2227 	struct rx_mpdu_start *rxd_mpdu_start;
2228 	struct ieee80211_hdr *hdr;
2229 	size_t hdr_len, crypto_len;
2230 	enum htt_rx_mpdu_encrypt_type enctype;
2231 	int bytes_aligned = ar->hw_params.decap_align_bytes;
2232 
2233 	first = skb_peek(amsdu);
2234 
2235 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
2236 				    (void *)first->data - hw->rx_desc_ops->rx_desc_size);
2237 
2238 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
2239 	rxd_mpdu_start = ath10k_htt_rx_desc_get_mpdu_start(hw, rxd);
2240 	hdr = (void *)ath10k_htt_rx_desc_get_rx_hdr_status(hw, rxd);
2241 
2242 	is_first = !!(rxd_msdu_end_common->info0 &
2243 		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
2244 	is_last = !!(rxd_msdu_end_common->info0 &
2245 		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
2246 
2247 	/* Return in case of non-aggregated msdu */
2248 	if (is_first && is_last)
2249 		return true;
2250 
2251 	/* First msdu flag is not set for the first msdu of the list */
2252 	if (!is_first)
2253 		return false;
2254 
2255 	enctype = MS(__le32_to_cpu(rxd_mpdu_start->info0),
2256 		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);
2257 
2258 	hdr_len = ieee80211_hdrlen(hdr->frame_control);
2259 	crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
2260 
2261 	subframe_hdr = (u8 *)hdr + round_up(hdr_len, bytes_aligned) +
2262 		       crypto_len;
2263 
2264 	/* Validate if the amsdu has a proper first subframe.
2265 	 * There are chances a single msdu can be received as amsdu when
2266 	 * the unauthenticated amsdu flag of a QoS header
2267 	 * gets flipped in non-SPP AMSDU's, in such cases the first
2268 	 * subframe has llc/snap header in place of a valid da.
2269 	 * return false if the da matches rfc1042 pattern
2270 	 */
2271 	if (ether_addr_equal(subframe_hdr, rfc1042_header))
2272 		return false;
2273 
2274 	return true;
2275 }
2276 
ath10k_htt_rx_amsdu_allowed(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * rx_status)2277 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
2278 					struct sk_buff_head *amsdu,
2279 					struct ieee80211_rx_status *rx_status)
2280 {
2281 	if (!rx_status->freq) {
2282 		ath10k_dbg(ar, ATH10K_DBG_HTT, "no channel configured; ignoring frame(s)!\n");
2283 		return false;
2284 	}
2285 
2286 	if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
2287 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
2288 		return false;
2289 	}
2290 
2291 	if (!ath10k_htt_rx_validate_amsdu(ar, amsdu)) {
2292 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid amsdu received\n");
2293 		return false;
2294 	}
2295 
2296 	return true;
2297 }
2298 
ath10k_htt_rx_h_filter(struct ath10k * ar,struct sk_buff_head * amsdu,struct ieee80211_rx_status * rx_status,unsigned long * drop_cnt)2299 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
2300 				   struct sk_buff_head *amsdu,
2301 				   struct ieee80211_rx_status *rx_status,
2302 				   unsigned long *drop_cnt)
2303 {
2304 	if (skb_queue_empty(amsdu))
2305 		return;
2306 
2307 	if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
2308 		return;
2309 
2310 	if (drop_cnt)
2311 		*drop_cnt += skb_queue_len(amsdu);
2312 
2313 	__skb_queue_purge(amsdu);
2314 }
2315 
ath10k_htt_rx_handle_amsdu(struct ath10k_htt * htt)2316 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
2317 {
2318 	struct ath10k *ar = htt->ar;
2319 	struct ieee80211_rx_status *rx_status = &htt->rx_status;
2320 	struct sk_buff_head amsdu;
2321 	int ret;
2322 	unsigned long drop_cnt = 0;
2323 	unsigned long unchain_cnt = 0;
2324 	unsigned long drop_cnt_filter = 0;
2325 	unsigned long msdus_to_queue, num_msdus;
2326 	enum ath10k_pkt_rx_err err = ATH10K_PKT_RX_ERR_MAX;
2327 	u8 first_hdr[RX_HTT_HDR_STATUS_LEN];
2328 
2329 	__skb_queue_head_init(&amsdu);
2330 
2331 	spin_lock_bh(&htt->rx_ring.lock);
2332 	if (htt->rx_confused) {
2333 		spin_unlock_bh(&htt->rx_ring.lock);
2334 		return -EIO;
2335 	}
2336 	ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
2337 	spin_unlock_bh(&htt->rx_ring.lock);
2338 
2339 	if (ret < 0) {
2340 		ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
2341 		__skb_queue_purge(&amsdu);
2342 		/* FIXME: It's probably a good idea to reboot the
2343 		 * device instead of leaving it inoperable.
2344 		 */
2345 		htt->rx_confused = true;
2346 		return ret;
2347 	}
2348 
2349 	num_msdus = skb_queue_len(&amsdu);
2350 
2351 	ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
2352 
2353 	/* only for ret = 1 indicates chained msdus */
2354 	if (ret > 0)
2355 		ath10k_htt_rx_h_unchain(ar, &amsdu, &drop_cnt, &unchain_cnt);
2356 
2357 	ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
2358 	ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err, 0,
2359 			     false);
2360 	msdus_to_queue = skb_queue_len(&amsdu);
2361 	ath10k_htt_rx_h_enqueue(ar, &amsdu, rx_status);
2362 
2363 	ath10k_sta_update_rx_tid_stats(ar, first_hdr, num_msdus, err,
2364 				       unchain_cnt, drop_cnt, drop_cnt_filter,
2365 				       msdus_to_queue);
2366 
2367 	return 0;
2368 }
2369 
ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc * rx_desc,union htt_rx_pn_t * pn,int pn_len_bits)2370 static void ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc *rx_desc,
2371 					  union htt_rx_pn_t *pn,
2372 					  int pn_len_bits)
2373 {
2374 	switch (pn_len_bits) {
2375 	case 48:
2376 		pn->pn48 = __le32_to_cpu(rx_desc->pn_31_0) +
2377 			   ((u64)(__le32_to_cpu(rx_desc->u0.pn_63_32) & 0xFFFF) << 32);
2378 		break;
2379 	case 24:
2380 		pn->pn24 = __le32_to_cpu(rx_desc->pn_31_0);
2381 		break;
2382 	}
2383 }
2384 
ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t * new_pn,union htt_rx_pn_t * old_pn)2385 static bool ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t *new_pn,
2386 				   union htt_rx_pn_t *old_pn)
2387 {
2388 	return ((new_pn->pn48 & 0xffffffffffffULL) <=
2389 		(old_pn->pn48 & 0xffffffffffffULL));
2390 }
2391 
ath10k_htt_rx_pn_check_replay_hl(struct ath10k * ar,struct ath10k_peer * peer,struct htt_rx_indication_hl * rx)2392 static bool ath10k_htt_rx_pn_check_replay_hl(struct ath10k *ar,
2393 					     struct ath10k_peer *peer,
2394 					     struct htt_rx_indication_hl *rx)
2395 {
2396 	bool last_pn_valid, pn_invalid = false;
2397 	enum htt_txrx_sec_cast_type sec_index;
2398 	enum htt_security_types sec_type;
2399 	union htt_rx_pn_t new_pn = {0};
2400 	struct htt_hl_rx_desc *rx_desc;
2401 	union htt_rx_pn_t *last_pn;
2402 	u32 rx_desc_info, tid;
2403 	int num_mpdu_ranges;
2404 
2405 	lockdep_assert_held(&ar->data_lock);
2406 
2407 	if (!peer)
2408 		return false;
2409 
2410 	if (!(rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU))
2411 		return false;
2412 
2413 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2414 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2415 
2416 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2417 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2418 
2419 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED))
2420 		return false;
2421 
2422 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2423 	last_pn_valid = peer->tids_last_pn_valid[tid];
2424 	last_pn = &peer->tids_last_pn[tid];
2425 
2426 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2427 		sec_index = HTT_TXRX_SEC_MCAST;
2428 	else
2429 		sec_index = HTT_TXRX_SEC_UCAST;
2430 
2431 	sec_type = peer->rx_pn[sec_index].sec_type;
2432 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2433 
2434 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2435 	    sec_type != HTT_SECURITY_TKIP &&
2436 	    sec_type != HTT_SECURITY_TKIP_NOMIC)
2437 		return false;
2438 
2439 	if (last_pn_valid)
2440 		pn_invalid = ath10k_htt_rx_pn_cmp48(&new_pn, last_pn);
2441 	else
2442 		peer->tids_last_pn_valid[tid] = true;
2443 
2444 	if (!pn_invalid)
2445 		last_pn->pn48 = new_pn.pn48;
2446 
2447 	return pn_invalid;
2448 }
2449 
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)2450 static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
2451 					 struct htt_rx_indication_hl *rx,
2452 					 struct sk_buff *skb,
2453 					 enum htt_rx_pn_check_type check_pn_type,
2454 					 enum htt_rx_tkip_demic_type tkip_mic_type)
2455 {
2456 	struct ath10k *ar = htt->ar;
2457 	struct ath10k_peer *peer;
2458 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2459 	struct fw_rx_desc_hl *fw_desc;
2460 	enum htt_txrx_sec_cast_type sec_index;
2461 	enum htt_security_types sec_type;
2462 	union htt_rx_pn_t new_pn = {0};
2463 	struct htt_hl_rx_desc *rx_desc;
2464 	struct ieee80211_hdr *hdr;
2465 	struct ieee80211_rx_status *rx_status;
2466 	u16 peer_id;
2467 	u8 rx_desc_len;
2468 	int num_mpdu_ranges;
2469 	size_t tot_hdr_len;
2470 	struct ieee80211_channel *ch;
2471 	bool pn_invalid, qos, first_msdu;
2472 	u32 tid, rx_desc_info;
2473 
2474 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2475 	tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2476 
2477 	spin_lock_bh(&ar->data_lock);
2478 	peer = ath10k_peer_find_by_id(ar, peer_id);
2479 	spin_unlock_bh(&ar->data_lock);
2480 	if (!peer && peer_id != HTT_INVALID_PEERID)
2481 		ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
2482 
2483 	if (!peer)
2484 		return true;
2485 
2486 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2487 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2488 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges_hl(rx);
2489 	fw_desc = &rx->fw_desc;
2490 	rx_desc_len = fw_desc->len;
2491 
2492 	if (fw_desc->u.bits.discard) {
2493 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt discard mpdu\n");
2494 		goto err;
2495 	}
2496 
2497 	/* I have not yet seen any case where num_mpdu_ranges > 1.
2498 	 * qcacld does not seem handle that case either, so we introduce the
2499 	 * same limitiation here as well.
2500 	 */
2501 	if (num_mpdu_ranges > 1)
2502 		ath10k_warn(ar,
2503 			    "Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
2504 			    num_mpdu_ranges);
2505 
2506 	if (mpdu_ranges->mpdu_range_status !=
2507 	    HTT_RX_IND_MPDU_STATUS_OK &&
2508 	    mpdu_ranges->mpdu_range_status !=
2509 	    HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) {
2510 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt mpdu_range_status %d\n",
2511 			   mpdu_ranges->mpdu_range_status);
2512 		goto err;
2513 	}
2514 
2515 	rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
2516 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2517 
2518 	if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
2519 		sec_index = HTT_TXRX_SEC_MCAST;
2520 	else
2521 		sec_index = HTT_TXRX_SEC_UCAST;
2522 
2523 	sec_type = peer->rx_pn[sec_index].sec_type;
2524 	first_msdu = rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU;
2525 
2526 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2527 
2528 	if (check_pn_type == HTT_RX_PN_CHECK && tid >= IEEE80211_NUM_TIDS) {
2529 		spin_lock_bh(&ar->data_lock);
2530 		pn_invalid = ath10k_htt_rx_pn_check_replay_hl(ar, peer, rx);
2531 		spin_unlock_bh(&ar->data_lock);
2532 
2533 		if (pn_invalid)
2534 			goto err;
2535 	}
2536 
2537 	/* Strip off all headers before the MAC header before delivery to
2538 	 * mac80211
2539 	 */
2540 	tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
2541 		      sizeof(rx->ppdu) + sizeof(rx->prefix) +
2542 		      sizeof(rx->fw_desc) +
2543 		      sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
2544 
2545 	skb_pull(skb, tot_hdr_len);
2546 
2547 	hdr = (struct ieee80211_hdr *)skb->data;
2548 	qos = ieee80211_is_data_qos(hdr->frame_control);
2549 
2550 	rx_status = IEEE80211_SKB_RXCB(skb);
2551 	memset(rx_status, 0, sizeof(*rx_status));
2552 
2553 	if (rx->ppdu.combined_rssi == 0) {
2554 		/* SDIO firmware does not provide signal */
2555 		rx_status->signal = 0;
2556 		rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
2557 	} else {
2558 		rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
2559 			rx->ppdu.combined_rssi;
2560 		rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
2561 	}
2562 
2563 	spin_lock_bh(&ar->data_lock);
2564 	ch = ar->scan_channel;
2565 	if (!ch)
2566 		ch = ar->rx_channel;
2567 	if (!ch)
2568 		ch = ath10k_htt_rx_h_any_channel(ar);
2569 	if (!ch)
2570 		ch = ar->tgt_oper_chan;
2571 	spin_unlock_bh(&ar->data_lock);
2572 
2573 	if (ch) {
2574 		rx_status->band = ch->band;
2575 		rx_status->freq = ch->center_freq;
2576 	}
2577 	if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
2578 		rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
2579 	else
2580 		rx_status->flag |= RX_FLAG_AMSDU_MORE;
2581 
2582 	/* Not entirely sure about this, but all frames from the chipset has
2583 	 * the protected flag set even though they have already been decrypted.
2584 	 * Unmasking this flag is necessary in order for mac80211 not to drop
2585 	 * the frame.
2586 	 * TODO: Verify this is always the case or find out a way to check
2587 	 * if there has been hw decryption.
2588 	 */
2589 	if (ieee80211_has_protected(hdr->frame_control)) {
2590 		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2591 		rx_status->flag |= RX_FLAG_DECRYPTED |
2592 				   RX_FLAG_IV_STRIPPED |
2593 				   RX_FLAG_MMIC_STRIPPED;
2594 
2595 		if (tid < IEEE80211_NUM_TIDS &&
2596 		    first_msdu &&
2597 		    check_pn_type == HTT_RX_PN_CHECK &&
2598 		   (sec_type == HTT_SECURITY_AES_CCMP ||
2599 		    sec_type == HTT_SECURITY_TKIP ||
2600 		    sec_type == HTT_SECURITY_TKIP_NOMIC)) {
2601 			u8 offset, *ivp, i;
2602 			s8 keyidx = 0;
2603 			__le64 pn48 = cpu_to_le64(new_pn.pn48);
2604 
2605 			hdr = (struct ieee80211_hdr *)skb->data;
2606 			offset = ieee80211_hdrlen(hdr->frame_control);
2607 			hdr->frame_control |= __cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2608 			rx_status->flag &= ~RX_FLAG_IV_STRIPPED;
2609 
2610 			memmove(skb->data - IEEE80211_CCMP_HDR_LEN,
2611 				skb->data, offset);
2612 			skb_push(skb, IEEE80211_CCMP_HDR_LEN);
2613 			ivp = skb->data + offset;
2614 			memset(skb->data + offset, 0, IEEE80211_CCMP_HDR_LEN);
2615 			/* Ext IV */
2616 			ivp[IEEE80211_WEP_IV_LEN - 1] |= ATH10K_IEEE80211_EXTIV;
2617 
2618 			for (i = 0; i < ARRAY_SIZE(peer->keys); i++) {
2619 				if (peer->keys[i] &&
2620 				    peer->keys[i]->flags & IEEE80211_KEY_FLAG_PAIRWISE)
2621 					keyidx = peer->keys[i]->keyidx;
2622 			}
2623 
2624 			/* Key ID */
2625 			ivp[IEEE80211_WEP_IV_LEN - 1] |= keyidx << 6;
2626 
2627 			if (sec_type == HTT_SECURITY_AES_CCMP) {
2628 				rx_status->flag |= RX_FLAG_MIC_STRIPPED;
2629 				/* pn 0, pn 1 */
2630 				memcpy(skb->data + offset, &pn48, 2);
2631 				/* pn 1, pn 3 , pn 34 , pn 5 */
2632 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2633 			} else {
2634 				rx_status->flag |= RX_FLAG_ICV_STRIPPED;
2635 				/* TSC 0 */
2636 				memcpy(skb->data + offset + 2, &pn48, 1);
2637 				/* TSC 1 */
2638 				memcpy(skb->data + offset, ((u8 *)&pn48) + 1, 1);
2639 				/* TSC 2 , TSC 3 , TSC 4 , TSC 5*/
2640 				memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
2641 			}
2642 		}
2643 	}
2644 
2645 	if (tkip_mic_type == HTT_RX_TKIP_MIC)
2646 		rx_status->flag &= ~RX_FLAG_IV_STRIPPED &
2647 				   ~RX_FLAG_MMIC_STRIPPED;
2648 
2649 	if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
2650 		rx_status->flag |= RX_FLAG_MMIC_ERROR;
2651 
2652 	if (!qos && tid < IEEE80211_NUM_TIDS) {
2653 		u8 offset;
2654 		__le16 qos_ctrl = 0;
2655 
2656 		hdr = (struct ieee80211_hdr *)skb->data;
2657 		offset = ieee80211_hdrlen(hdr->frame_control);
2658 
2659 		hdr->frame_control |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2660 		memmove(skb->data - IEEE80211_QOS_CTL_LEN, skb->data, offset);
2661 		skb_push(skb, IEEE80211_QOS_CTL_LEN);
2662 		qos_ctrl = cpu_to_le16(tid);
2663 		memcpy(skb->data + offset, &qos_ctrl, IEEE80211_QOS_CTL_LEN);
2664 	}
2665 
2666 	if (ar->napi.dev)
2667 		ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
2668 	else
2669 		ieee80211_rx_ni(ar->hw, skb);
2670 
2671 	/* We have delivered the skb to the upper layers (mac80211) so we
2672 	 * must not free it.
2673 	 */
2674 	return false;
2675 err:
2676 	/* Tell the caller that it must free the skb since we have not
2677 	 * consumed it
2678 	 */
2679 	return true;
2680 }
2681 
ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff * skb,u16 head_len,u16 hdr_len)2682 static int ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff *skb,
2683 					       u16 head_len,
2684 					       u16 hdr_len)
2685 {
2686 	u8 *ivp, *orig_hdr;
2687 
2688 	orig_hdr = skb->data;
2689 	ivp = orig_hdr + hdr_len + head_len;
2690 
2691 	/* the ExtIV bit is always set to 1 for TKIP */
2692 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2693 		return -EINVAL;
2694 
2695 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2696 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2697 	skb_trim(skb, skb->len - ATH10K_IEEE80211_TKIP_MICLEN);
2698 	return 0;
2699 }
2700 
ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff * skb,u16 head_len,u16 hdr_len)2701 static int ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff *skb,
2702 						 u16 head_len,
2703 						 u16 hdr_len)
2704 {
2705 	u8 *ivp, *orig_hdr;
2706 
2707 	orig_hdr = skb->data;
2708 	ivp = orig_hdr + hdr_len + head_len;
2709 
2710 	/* the ExtIV bit is always set to 1 for TKIP */
2711 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2712 		return -EINVAL;
2713 
2714 	memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
2715 	skb_pull(skb, IEEE80211_TKIP_IV_LEN);
2716 	skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
2717 	return 0;
2718 }
2719 
ath10k_htt_rx_frag_ccmp_decap(struct sk_buff * skb,u16 head_len,u16 hdr_len)2720 static int ath10k_htt_rx_frag_ccmp_decap(struct sk_buff *skb,
2721 					 u16 head_len,
2722 					 u16 hdr_len)
2723 {
2724 	u8 *ivp, *orig_hdr;
2725 
2726 	orig_hdr = skb->data;
2727 	ivp = orig_hdr + hdr_len + head_len;
2728 
2729 	/* the ExtIV bit is always set to 1 for CCMP */
2730 	if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
2731 		return -EINVAL;
2732 
2733 	skb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN);
2734 	memmove(orig_hdr + IEEE80211_CCMP_HDR_LEN, orig_hdr, head_len + hdr_len);
2735 	skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
2736 	return 0;
2737 }
2738 
ath10k_htt_rx_frag_wep_decap(struct sk_buff * skb,u16 head_len,u16 hdr_len)2739 static int ath10k_htt_rx_frag_wep_decap(struct sk_buff *skb,
2740 					u16 head_len,
2741 					u16 hdr_len)
2742 {
2743 	u8 *orig_hdr;
2744 
2745 	orig_hdr = skb->data;
2746 
2747 	memmove(orig_hdr + IEEE80211_WEP_IV_LEN,
2748 		orig_hdr, head_len + hdr_len);
2749 	skb_pull(skb, IEEE80211_WEP_IV_LEN);
2750 	skb_trim(skb, skb->len - IEEE80211_WEP_ICV_LEN);
2751 	return 0;
2752 }
2753 
ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt * htt,struct htt_rx_fragment_indication * rx,struct sk_buff * skb)2754 static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
2755 					      struct htt_rx_fragment_indication *rx,
2756 					      struct sk_buff *skb)
2757 {
2758 	struct ath10k *ar = htt->ar;
2759 	enum htt_rx_tkip_demic_type tkip_mic = HTT_RX_NON_TKIP_MIC;
2760 	enum htt_txrx_sec_cast_type sec_index;
2761 	struct htt_rx_indication_hl *rx_hl;
2762 	enum htt_security_types sec_type;
2763 	u32 tid, frag, seq, rx_desc_info;
2764 	union htt_rx_pn_t new_pn = {0};
2765 	struct htt_hl_rx_desc *rx_desc;
2766 	u16 peer_id, sc, hdr_space;
2767 	union htt_rx_pn_t *last_pn;
2768 	struct ieee80211_hdr *hdr;
2769 	int ret, num_mpdu_ranges;
2770 	struct ath10k_peer *peer;
2771 	struct htt_resp *resp;
2772 	size_t tot_hdr_len;
2773 
2774 	resp = (struct htt_resp *)(skb->data + HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2775 	skb_pull(skb, HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
2776 	skb_trim(skb, skb->len - FCS_LEN);
2777 
2778 	peer_id = __le16_to_cpu(rx->peer_id);
2779 	rx_hl = (struct htt_rx_indication_hl *)(&resp->rx_ind_hl);
2780 
2781 	spin_lock_bh(&ar->data_lock);
2782 	peer = ath10k_peer_find_by_id(ar, peer_id);
2783 	if (!peer) {
2784 		ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer: %u\n", peer_id);
2785 		goto err;
2786 	}
2787 
2788 	num_mpdu_ranges = MS(__le32_to_cpu(rx_hl->hdr.info1),
2789 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2790 
2791 	tot_hdr_len = sizeof(struct htt_resp_hdr) +
2792 		      sizeof(rx_hl->hdr) +
2793 		      sizeof(rx_hl->ppdu) +
2794 		      sizeof(rx_hl->prefix) +
2795 		      sizeof(rx_hl->fw_desc) +
2796 		      sizeof(struct htt_rx_indication_mpdu_range) * num_mpdu_ranges;
2797 
2798 	tid =  MS(rx_hl->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2799 	rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
2800 	rx_desc_info = __le32_to_cpu(rx_desc->info);
2801 
2802 	hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
2803 
2804 	if (is_multicast_ether_addr(hdr->addr1)) {
2805 		/* Discard the fragment with multicast DA */
2806 		goto err;
2807 	}
2808 
2809 	if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
2810 		spin_unlock_bh(&ar->data_lock);
2811 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2812 						    HTT_RX_NON_PN_CHECK,
2813 						    HTT_RX_NON_TKIP_MIC);
2814 	}
2815 
2816 	if (ieee80211_has_retry(hdr->frame_control))
2817 		goto err;
2818 
2819 	hdr_space = ieee80211_hdrlen(hdr->frame_control);
2820 	sc = __le16_to_cpu(hdr->seq_ctrl);
2821 	seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2822 	frag = sc & IEEE80211_SCTL_FRAG;
2823 
2824 	sec_index = MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST) ?
2825 		    HTT_TXRX_SEC_MCAST : HTT_TXRX_SEC_UCAST;
2826 	sec_type = peer->rx_pn[sec_index].sec_type;
2827 	ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
2828 
2829 	switch (sec_type) {
2830 	case HTT_SECURITY_TKIP:
2831 		tkip_mic = HTT_RX_TKIP_MIC;
2832 		ret = ath10k_htt_rx_frag_tkip_decap_withmic(skb,
2833 							    tot_hdr_len +
2834 							    rx_hl->fw_desc.len,
2835 							    hdr_space);
2836 		if (ret)
2837 			goto err;
2838 		break;
2839 	case HTT_SECURITY_TKIP_NOMIC:
2840 		ret = ath10k_htt_rx_frag_tkip_decap_nomic(skb,
2841 							  tot_hdr_len +
2842 							  rx_hl->fw_desc.len,
2843 							  hdr_space);
2844 		if (ret)
2845 			goto err;
2846 		break;
2847 	case HTT_SECURITY_AES_CCMP:
2848 		ret = ath10k_htt_rx_frag_ccmp_decap(skb,
2849 						    tot_hdr_len + rx_hl->fw_desc.len,
2850 						    hdr_space);
2851 		if (ret)
2852 			goto err;
2853 		break;
2854 	case HTT_SECURITY_WEP128:
2855 	case HTT_SECURITY_WEP104:
2856 	case HTT_SECURITY_WEP40:
2857 		ret = ath10k_htt_rx_frag_wep_decap(skb,
2858 						   tot_hdr_len + rx_hl->fw_desc.len,
2859 						   hdr_space);
2860 		if (ret)
2861 			goto err;
2862 		break;
2863 	default:
2864 		break;
2865 	}
2866 
2867 	resp = (struct htt_resp *)(skb->data);
2868 
2869 	if (sec_type != HTT_SECURITY_AES_CCMP &&
2870 	    sec_type != HTT_SECURITY_TKIP &&
2871 	    sec_type != HTT_SECURITY_TKIP_NOMIC) {
2872 		spin_unlock_bh(&ar->data_lock);
2873 		return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2874 						    HTT_RX_NON_PN_CHECK,
2875 						    HTT_RX_NON_TKIP_MIC);
2876 	}
2877 
2878 	last_pn = &peer->frag_tids_last_pn[tid];
2879 
2880 	if (frag == 0) {
2881 		if (ath10k_htt_rx_pn_check_replay_hl(ar, peer, &resp->rx_ind_hl))
2882 			goto err;
2883 
2884 		last_pn->pn48 = new_pn.pn48;
2885 		peer->frag_tids_seq[tid] = seq;
2886 	} else if (sec_type == HTT_SECURITY_AES_CCMP) {
2887 		if (seq != peer->frag_tids_seq[tid])
2888 			goto err;
2889 
2890 		if (new_pn.pn48 != last_pn->pn48 + 1)
2891 			goto err;
2892 
2893 		last_pn->pn48 = new_pn.pn48;
2894 		last_pn = &peer->tids_last_pn[tid];
2895 		last_pn->pn48 = new_pn.pn48;
2896 	}
2897 
2898 	spin_unlock_bh(&ar->data_lock);
2899 
2900 	return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
2901 					    HTT_RX_NON_PN_CHECK, tkip_mic);
2902 
2903 err:
2904 	spin_unlock_bh(&ar->data_lock);
2905 
2906 	/* Tell the caller that it must free the skb since we have not
2907 	 * consumed it
2908 	 */
2909 	return true;
2910 }
2911 
ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt * htt,struct htt_rx_indication * rx)2912 static void ath10k_htt_rx_proc_rx_ind_ll(struct ath10k_htt *htt,
2913 					 struct htt_rx_indication *rx)
2914 {
2915 	struct ath10k *ar = htt->ar;
2916 	struct htt_rx_indication_mpdu_range *mpdu_ranges;
2917 	int num_mpdu_ranges;
2918 	int i, mpdu_count = 0;
2919 	u16 peer_id;
2920 	u8 tid;
2921 
2922 	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
2923 			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
2924 	peer_id = __le16_to_cpu(rx->hdr.peer_id);
2925 	tid =  MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
2926 
2927 	mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
2928 
2929 	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
2930 			rx, struct_size(rx, mpdu_ranges, num_mpdu_ranges));
2931 
2932 	for (i = 0; i < num_mpdu_ranges; i++)
2933 		mpdu_count += mpdu_ranges[i].mpdu_count;
2934 
2935 	atomic_add(mpdu_count, &htt->num_mpdus_ready);
2936 
2937 	ath10k_sta_update_rx_tid_stats_ampdu(ar, peer_id, tid, mpdu_ranges,
2938 					     num_mpdu_ranges);
2939 }
2940 
ath10k_htt_rx_tx_compl_ind(struct ath10k * ar,struct sk_buff * skb)2941 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
2942 				       struct sk_buff *skb)
2943 {
2944 	struct ath10k_htt *htt = &ar->htt;
2945 	struct htt_resp *resp = (struct htt_resp *)skb->data;
2946 	struct htt_tx_done tx_done = {};
2947 	int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
2948 	__le16 msdu_id, *msdus;
2949 	bool rssi_enabled = false;
2950 	u8 msdu_count = 0, num_airtime_records, tid;
2951 	int i, htt_pad = 0;
2952 	struct htt_data_tx_compl_ppdu_dur *ppdu_info;
2953 	struct ath10k_peer *peer;
2954 	u16 ppdu_info_offset = 0, peer_id;
2955 	u32 tx_duration;
2956 
2957 	switch (status) {
2958 	case HTT_DATA_TX_STATUS_NO_ACK:
2959 		tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2960 		break;
2961 	case HTT_DATA_TX_STATUS_OK:
2962 		tx_done.status = HTT_TX_COMPL_STATE_ACK;
2963 		break;
2964 	case HTT_DATA_TX_STATUS_DISCARD:
2965 	case HTT_DATA_TX_STATUS_POSTPONE:
2966 	case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
2967 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2968 		break;
2969 	default:
2970 		ath10k_warn(ar, "unhandled tx completion status %d\n", status);
2971 		tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2972 		break;
2973 	}
2974 
2975 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
2976 		   resp->data_tx_completion.num_msdus);
2977 
2978 	msdu_count = resp->data_tx_completion.num_msdus;
2979 	msdus = resp->data_tx_completion.msdus;
2980 	rssi_enabled = ath10k_is_rssi_enable(&ar->hw_params, resp);
2981 
2982 	if (rssi_enabled)
2983 		htt_pad = ath10k_tx_data_rssi_get_pad_bytes(&ar->hw_params,
2984 							    resp);
2985 
2986 	for (i = 0; i < msdu_count; i++) {
2987 		msdu_id = msdus[i];
2988 		tx_done.msdu_id = __le16_to_cpu(msdu_id);
2989 
2990 		if (rssi_enabled) {
2991 			/* Total no of MSDUs should be even,
2992 			 * if odd MSDUs are sent firmware fills
2993 			 * last msdu id with 0xffff
2994 			 */
2995 			if (msdu_count & 0x01) {
2996 				msdu_id = msdus[msdu_count +  i + 1 + htt_pad];
2997 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
2998 			} else {
2999 				msdu_id = msdus[msdu_count +  i + htt_pad];
3000 				tx_done.ack_rssi = __le16_to_cpu(msdu_id);
3001 			}
3002 		}
3003 
3004 		/* kfifo_put: In practice firmware shouldn't fire off per-CE
3005 		 * interrupt and main interrupt (MSI/-X range case) for the same
3006 		 * HTC service so it should be safe to use kfifo_put w/o lock.
3007 		 *
3008 		 * From kfifo_put() documentation:
3009 		 *  Note that with only one concurrent reader and one concurrent
3010 		 *  writer, you don't need extra locking to use these macro.
3011 		 */
3012 		if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
3013 			ath10k_txrx_tx_unref(htt, &tx_done);
3014 		} else if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
3015 			ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
3016 				    tx_done.msdu_id, tx_done.status);
3017 			ath10k_txrx_tx_unref(htt, &tx_done);
3018 		}
3019 	}
3020 
3021 	if (!(resp->data_tx_completion.flags2 & HTT_TX_CMPL_FLAG_PPDU_DURATION_PRESENT))
3022 		return;
3023 
3024 	ppdu_info_offset = (msdu_count & 0x01) ? msdu_count + 1 : msdu_count;
3025 
3026 	if (rssi_enabled)
3027 		ppdu_info_offset += ppdu_info_offset;
3028 
3029 	if (resp->data_tx_completion.flags2 &
3030 	    (HTT_TX_CMPL_FLAG_PPID_PRESENT | HTT_TX_CMPL_FLAG_PA_PRESENT))
3031 		ppdu_info_offset += 2;
3032 
3033 	ppdu_info = (struct htt_data_tx_compl_ppdu_dur *)&msdus[ppdu_info_offset];
3034 	num_airtime_records = FIELD_GET(HTT_TX_COMPL_PPDU_DUR_INFO0_NUM_ENTRIES_MASK,
3035 					__le32_to_cpu(ppdu_info->info0));
3036 
3037 	for (i = 0; i < num_airtime_records; i++) {
3038 		struct htt_data_tx_ppdu_dur *ppdu_dur;
3039 		u32 info0;
3040 
3041 		ppdu_dur = &ppdu_info->ppdu_dur[i];
3042 		info0 = __le32_to_cpu(ppdu_dur->info0);
3043 
3044 		peer_id = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_PEER_ID_MASK,
3045 				    info0);
3046 		rcu_read_lock();
3047 		spin_lock_bh(&ar->data_lock);
3048 
3049 		peer = ath10k_peer_find_by_id(ar, peer_id);
3050 		if (!peer || !peer->sta) {
3051 			spin_unlock_bh(&ar->data_lock);
3052 			rcu_read_unlock();
3053 			continue;
3054 		}
3055 
3056 		tid = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_TID_MASK, info0) &
3057 						IEEE80211_QOS_CTL_TID_MASK;
3058 		tx_duration = __le32_to_cpu(ppdu_dur->tx_duration);
3059 
3060 		ieee80211_sta_register_airtime(peer->sta, tid, tx_duration, 0);
3061 
3062 		spin_unlock_bh(&ar->data_lock);
3063 		rcu_read_unlock();
3064 	}
3065 }
3066 
ath10k_htt_rx_addba(struct ath10k * ar,struct htt_resp * resp)3067 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
3068 {
3069 	struct htt_rx_addba *ev = &resp->rx_addba;
3070 	struct ath10k_peer *peer;
3071 	struct ath10k_vif *arvif;
3072 	u16 info0, tid, peer_id;
3073 
3074 	info0 = __le16_to_cpu(ev->info0);
3075 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
3076 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
3077 
3078 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3079 		   "htt rx addba tid %u peer_id %u size %u\n",
3080 		   tid, peer_id, ev->window_size);
3081 
3082 	spin_lock_bh(&ar->data_lock);
3083 	peer = ath10k_peer_find_by_id(ar, peer_id);
3084 	if (!peer) {
3085 		ath10k_warn(ar, "received addba event for invalid peer_id: %u\n",
3086 			    peer_id);
3087 		spin_unlock_bh(&ar->data_lock);
3088 		return;
3089 	}
3090 
3091 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
3092 	if (!arvif) {
3093 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
3094 			    peer->vdev_id);
3095 		spin_unlock_bh(&ar->data_lock);
3096 		return;
3097 	}
3098 
3099 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3100 		   "htt rx start rx ba session sta %pM tid %u size %u\n",
3101 		   peer->addr, tid, ev->window_size);
3102 
3103 	ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
3104 	spin_unlock_bh(&ar->data_lock);
3105 }
3106 
ath10k_htt_rx_delba(struct ath10k * ar,struct htt_resp * resp)3107 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
3108 {
3109 	struct htt_rx_delba *ev = &resp->rx_delba;
3110 	struct ath10k_peer *peer;
3111 	struct ath10k_vif *arvif;
3112 	u16 info0, tid, peer_id;
3113 
3114 	info0 = __le16_to_cpu(ev->info0);
3115 	tid = MS(info0, HTT_RX_BA_INFO0_TID);
3116 	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
3117 
3118 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3119 		   "htt rx delba tid %u peer_id %u\n",
3120 		   tid, peer_id);
3121 
3122 	spin_lock_bh(&ar->data_lock);
3123 	peer = ath10k_peer_find_by_id(ar, peer_id);
3124 	if (!peer) {
3125 		ath10k_warn(ar, "received addba event for invalid peer_id: %u\n",
3126 			    peer_id);
3127 		spin_unlock_bh(&ar->data_lock);
3128 		return;
3129 	}
3130 
3131 	arvif = ath10k_get_arvif(ar, peer->vdev_id);
3132 	if (!arvif) {
3133 		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
3134 			    peer->vdev_id);
3135 		spin_unlock_bh(&ar->data_lock);
3136 		return;
3137 	}
3138 
3139 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3140 		   "htt rx stop rx ba session sta %pM tid %u\n",
3141 		   peer->addr, tid);
3142 
3143 	ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
3144 	spin_unlock_bh(&ar->data_lock);
3145 }
3146 
ath10k_htt_rx_extract_amsdu(struct ath10k_hw_params * hw,struct sk_buff_head * list,struct sk_buff_head * amsdu)3147 static int ath10k_htt_rx_extract_amsdu(struct ath10k_hw_params *hw,
3148 				       struct sk_buff_head *list,
3149 				       struct sk_buff_head *amsdu)
3150 {
3151 	struct sk_buff *msdu;
3152 	struct htt_rx_desc *rxd;
3153 	struct rx_msdu_end_common *rxd_msdu_end_common;
3154 
3155 	if (skb_queue_empty(list))
3156 		return -ENOBUFS;
3157 
3158 	if (WARN_ON(!skb_queue_empty(amsdu)))
3159 		return -EINVAL;
3160 
3161 	while ((msdu = __skb_dequeue(list))) {
3162 		__skb_queue_tail(amsdu, msdu);
3163 
3164 		rxd = HTT_RX_BUF_TO_RX_DESC(hw,
3165 					    (void *)msdu->data -
3166 					    hw->rx_desc_ops->rx_desc_size);
3167 
3168 		rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
3169 		if (rxd_msdu_end_common->info0 &
3170 		    __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
3171 			break;
3172 	}
3173 
3174 	msdu = skb_peek_tail(amsdu);
3175 	rxd = HTT_RX_BUF_TO_RX_DESC(hw,
3176 				    (void *)msdu->data - hw->rx_desc_ops->rx_desc_size);
3177 
3178 	rxd_msdu_end_common = ath10k_htt_rx_desc_get_msdu_end(hw, rxd);
3179 	if (!(rxd_msdu_end_common->info0 &
3180 	      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
3181 		skb_queue_splice_init(amsdu, list);
3182 		return -EAGAIN;
3183 	}
3184 
3185 	return 0;
3186 }
3187 
ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status * status,struct sk_buff * skb)3188 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
3189 					    struct sk_buff *skb)
3190 {
3191 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
3192 
3193 	if (!ieee80211_has_protected(hdr->frame_control))
3194 		return;
3195 
3196 	/* Offloaded frames are already decrypted but firmware insists they are
3197 	 * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
3198 	 * will drop the frame.
3199 	 */
3200 
3201 	hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3202 	status->flag |= RX_FLAG_DECRYPTED |
3203 			RX_FLAG_IV_STRIPPED |
3204 			RX_FLAG_MMIC_STRIPPED;
3205 }
3206 
ath10k_htt_rx_h_rx_offload(struct ath10k * ar,struct sk_buff_head * list)3207 static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
3208 				       struct sk_buff_head *list)
3209 {
3210 	struct ath10k_htt *htt = &ar->htt;
3211 	struct ieee80211_rx_status *status = &htt->rx_status;
3212 	struct htt_rx_offload_msdu *rx;
3213 	struct sk_buff *msdu;
3214 	size_t offset;
3215 
3216 	while ((msdu = __skb_dequeue(list))) {
3217 		/* Offloaded frames don't have Rx descriptor. Instead they have
3218 		 * a short meta information header.
3219 		 */
3220 
3221 		rx = (void *)msdu->data;
3222 
3223 		skb_put(msdu, sizeof(*rx));
3224 		skb_pull(msdu, sizeof(*rx));
3225 
3226 		if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
3227 			ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
3228 			dev_kfree_skb_any(msdu);
3229 			continue;
3230 		}
3231 
3232 		skb_put(msdu, __le16_to_cpu(rx->msdu_len));
3233 
3234 		/* Offloaded rx header length isn't multiple of 2 nor 4 so the
3235 		 * actual payload is unaligned. Align the frame.  Otherwise
3236 		 * mac80211 complains.  This shouldn't reduce performance much
3237 		 * because these offloaded frames are rare.
3238 		 */
3239 		offset = 4 - ((unsigned long)msdu->data & 3);
3240 		skb_put(msdu, offset);
3241 		memmove(msdu->data + offset, msdu->data, msdu->len);
3242 		skb_pull(msdu, offset);
3243 
3244 		/* FIXME: The frame is NWifi. Re-construct QoS Control
3245 		 * if possible later.
3246 		 */
3247 
3248 		memset(status, 0, sizeof(*status));
3249 		status->flag |= RX_FLAG_NO_SIGNAL_VAL;
3250 
3251 		ath10k_htt_rx_h_rx_offload_prot(status, msdu);
3252 		ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
3253 		ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
3254 	}
3255 }
3256 
ath10k_htt_rx_in_ord_ind(struct ath10k * ar,struct sk_buff * skb)3257 static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
3258 {
3259 	struct ath10k_htt *htt = &ar->htt;
3260 	struct htt_resp *resp = (void *)skb->data;
3261 	struct ieee80211_rx_status *status = &htt->rx_status;
3262 	struct sk_buff_head list;
3263 	struct sk_buff_head amsdu;
3264 	u16 peer_id;
3265 	u16 msdu_count;
3266 	u8 vdev_id;
3267 	u8 tid;
3268 	bool offload;
3269 	bool frag;
3270 	int ret;
3271 
3272 	lockdep_assert_held(&htt->rx_ring.lock);
3273 
3274 	if (htt->rx_confused)
3275 		return -EIO;
3276 
3277 	skb_pull(skb, sizeof(resp->hdr));
3278 	skb_pull(skb, sizeof(resp->rx_in_ord_ind));
3279 
3280 	peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
3281 	msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
3282 	vdev_id = resp->rx_in_ord_ind.vdev_id;
3283 	tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
3284 	offload = !!(resp->rx_in_ord_ind.info &
3285 			HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
3286 	frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
3287 
3288 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3289 		   "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
3290 		   vdev_id, peer_id, tid, offload, frag, msdu_count);
3291 
3292 	if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs32)) {
3293 		ath10k_warn(ar, "dropping invalid in order rx indication\n");
3294 		return -EINVAL;
3295 	}
3296 
3297 	/* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
3298 	 * extracted and processed.
3299 	 */
3300 	__skb_queue_head_init(&list);
3301 	if (ar->hw_params.target_64bit)
3302 		ret = ath10k_htt_rx_pop_paddr64_list(htt, &resp->rx_in_ord_ind,
3303 						     &list);
3304 	else
3305 		ret = ath10k_htt_rx_pop_paddr32_list(htt, &resp->rx_in_ord_ind,
3306 						     &list);
3307 
3308 	if (ret < 0) {
3309 		ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
3310 		htt->rx_confused = true;
3311 		return -EIO;
3312 	}
3313 
3314 	/* Offloaded frames are very different and need to be handled
3315 	 * separately.
3316 	 */
3317 	if (offload)
3318 		ath10k_htt_rx_h_rx_offload(ar, &list);
3319 
3320 	while (!skb_queue_empty(&list)) {
3321 		__skb_queue_head_init(&amsdu);
3322 		ret = ath10k_htt_rx_extract_amsdu(&ar->hw_params, &list, &amsdu);
3323 		switch (ret) {
3324 		case 0:
3325 			/* Note: The in-order indication may report interleaved
3326 			 * frames from different PPDUs meaning reported rx rate
3327 			 * to mac80211 isn't accurate/reliable. It's still
3328 			 * better to report something than nothing though. This
3329 			 * should still give an idea about rx rate to the user.
3330 			 */
3331 			ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
3332 			ath10k_htt_rx_h_filter(ar, &amsdu, status, NULL);
3333 			ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false, NULL,
3334 					     NULL, peer_id, frag);
3335 			ath10k_htt_rx_h_enqueue(ar, &amsdu, status);
3336 			break;
3337 		case -EAGAIN:
3338 			fallthrough;
3339 		default:
3340 			/* Should not happen. */
3341 			ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
3342 			htt->rx_confused = true;
3343 			__skb_queue_purge(&list);
3344 			return -EIO;
3345 		}
3346 	}
3347 	return ret;
3348 }
3349 
ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k * ar,const __le32 * resp_ids,int num_resp_ids)3350 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
3351 						   const __le32 *resp_ids,
3352 						   int num_resp_ids)
3353 {
3354 	int i;
3355 	u32 resp_id;
3356 
3357 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
3358 		   num_resp_ids);
3359 
3360 	for (i = 0; i < num_resp_ids; i++) {
3361 		resp_id = le32_to_cpu(resp_ids[i]);
3362 
3363 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
3364 			   resp_id);
3365 
3366 		/* TODO: free resp_id */
3367 	}
3368 }
3369 
ath10k_htt_rx_tx_fetch_ind(struct ath10k * ar,struct sk_buff * skb)3370 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
3371 {
3372 	struct ieee80211_hw *hw = ar->hw;
3373 	struct ieee80211_txq *txq;
3374 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3375 	struct htt_tx_fetch_record *record;
3376 	size_t len;
3377 	size_t max_num_bytes;
3378 	size_t max_num_msdus;
3379 	size_t num_bytes;
3380 	size_t num_msdus;
3381 	const __le32 *resp_ids;
3382 	u16 num_records;
3383 	u16 num_resp_ids;
3384 	u16 peer_id;
3385 	u8 tid;
3386 	int ret;
3387 	int i;
3388 	bool may_tx;
3389 
3390 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
3391 
3392 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
3393 	if (unlikely(skb->len < len)) {
3394 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
3395 		return;
3396 	}
3397 
3398 	num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
3399 	num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
3400 
3401 	len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
3402 	len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
3403 
3404 	if (unlikely(skb->len < len)) {
3405 		ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
3406 		return;
3407 	}
3408 
3409 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %u num resps %u seq %u\n",
3410 		   num_records, num_resp_ids,
3411 		   le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
3412 
3413 	if (!ar->htt.tx_q_state.enabled) {
3414 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
3415 		return;
3416 	}
3417 
3418 	if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
3419 		ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
3420 		return;
3421 	}
3422 
3423 	rcu_read_lock();
3424 
3425 	for (i = 0; i < num_records; i++) {
3426 		record = &resp->tx_fetch_ind.records[i];
3427 		peer_id = MS(le16_to_cpu(record->info),
3428 			     HTT_TX_FETCH_RECORD_INFO_PEER_ID);
3429 		tid = MS(le16_to_cpu(record->info),
3430 			 HTT_TX_FETCH_RECORD_INFO_TID);
3431 		max_num_msdus = le16_to_cpu(record->num_msdus);
3432 		max_num_bytes = le32_to_cpu(record->num_bytes);
3433 
3434 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %u tid %u msdus %zu bytes %zu\n",
3435 			   i, peer_id, tid, max_num_msdus, max_num_bytes);
3436 
3437 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3438 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3439 			ath10k_warn(ar, "received out of range peer_id %u tid %u\n",
3440 				    peer_id, tid);
3441 			continue;
3442 		}
3443 
3444 		spin_lock_bh(&ar->data_lock);
3445 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3446 		spin_unlock_bh(&ar->data_lock);
3447 
3448 		/* It is okay to release the lock and use txq because RCU read
3449 		 * lock is held.
3450 		 */
3451 
3452 		if (unlikely(!txq)) {
3453 			ath10k_warn(ar, "failed to lookup txq for peer_id %u tid %u\n",
3454 				    peer_id, tid);
3455 			continue;
3456 		}
3457 
3458 		num_msdus = 0;
3459 		num_bytes = 0;
3460 
3461 		ieee80211_txq_schedule_start(hw, txq->ac);
3462 		may_tx = ieee80211_txq_may_transmit(hw, txq);
3463 		while (num_msdus < max_num_msdus &&
3464 		       num_bytes < max_num_bytes) {
3465 			if (!may_tx)
3466 				break;
3467 
3468 			ret = ath10k_mac_tx_push_txq(hw, txq);
3469 			if (ret < 0)
3470 				break;
3471 
3472 			num_msdus++;
3473 			num_bytes += ret;
3474 		}
3475 		ieee80211_return_txq(hw, txq, false);
3476 		ieee80211_txq_schedule_end(hw, txq->ac);
3477 
3478 		record->num_msdus = cpu_to_le16(num_msdus);
3479 		record->num_bytes = cpu_to_le32(num_bytes);
3480 
3481 		ath10k_htt_tx_txq_recalc(hw, txq);
3482 	}
3483 
3484 	rcu_read_unlock();
3485 
3486 	resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
3487 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
3488 
3489 	ret = ath10k_htt_tx_fetch_resp(ar,
3490 				       resp->tx_fetch_ind.token,
3491 				       resp->tx_fetch_ind.fetch_seq_num,
3492 				       resp->tx_fetch_ind.records,
3493 				       num_records);
3494 	if (unlikely(ret)) {
3495 		ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
3496 			    le32_to_cpu(resp->tx_fetch_ind.token), ret);
3497 		/* FIXME: request fw restart */
3498 	}
3499 
3500 	ath10k_htt_tx_txq_sync(ar);
3501 }
3502 
ath10k_htt_rx_tx_fetch_confirm(struct ath10k * ar,struct sk_buff * skb)3503 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
3504 					   struct sk_buff *skb)
3505 {
3506 	const struct htt_resp *resp = (void *)skb->data;
3507 	size_t len;
3508 	int num_resp_ids;
3509 
3510 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
3511 
3512 	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
3513 	if (unlikely(skb->len < len)) {
3514 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
3515 		return;
3516 	}
3517 
3518 	num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
3519 	len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
3520 
3521 	if (unlikely(skb->len < len)) {
3522 		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
3523 		return;
3524 	}
3525 
3526 	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
3527 					       resp->tx_fetch_confirm.resp_ids,
3528 					       num_resp_ids);
3529 }
3530 
ath10k_htt_rx_tx_mode_switch_ind(struct ath10k * ar,struct sk_buff * skb)3531 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
3532 					     struct sk_buff *skb)
3533 {
3534 	const struct htt_resp *resp = (void *)skb->data;
3535 	const struct htt_tx_mode_switch_record *record;
3536 	struct ieee80211_txq *txq;
3537 	struct ath10k_txq *artxq;
3538 	size_t len;
3539 	size_t num_records;
3540 	enum htt_tx_mode_switch_mode mode;
3541 	bool enable;
3542 	u16 info0;
3543 	u16 info1;
3544 	u16 threshold;
3545 	u16 peer_id;
3546 	u8 tid;
3547 	int i;
3548 
3549 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
3550 
3551 	len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
3552 	if (unlikely(skb->len < len)) {
3553 		ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
3554 		return;
3555 	}
3556 
3557 	info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
3558 	info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
3559 
3560 	enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
3561 	num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3562 	mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
3563 	threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
3564 
3565 	ath10k_dbg(ar, ATH10K_DBG_HTT,
3566 		   "htt rx tx mode switch ind info0 0x%04hx info1 0x%04x enable %d num records %zd mode %d threshold %u\n",
3567 		   info0, info1, enable, num_records, mode, threshold);
3568 
3569 	len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
3570 
3571 	if (unlikely(skb->len < len)) {
3572 		ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
3573 		return;
3574 	}
3575 
3576 	switch (mode) {
3577 	case HTT_TX_MODE_SWITCH_PUSH:
3578 	case HTT_TX_MODE_SWITCH_PUSH_PULL:
3579 		break;
3580 	default:
3581 		ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
3582 			    mode);
3583 		return;
3584 	}
3585 
3586 	if (!enable)
3587 		return;
3588 
3589 	ar->htt.tx_q_state.enabled = enable;
3590 	ar->htt.tx_q_state.mode = mode;
3591 	ar->htt.tx_q_state.num_push_allowed = threshold;
3592 
3593 	rcu_read_lock();
3594 
3595 	for (i = 0; i < num_records; i++) {
3596 		record = &resp->tx_mode_switch_ind.records[i];
3597 		info0 = le16_to_cpu(record->info0);
3598 		peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
3599 		tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
3600 
3601 		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
3602 		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
3603 			ath10k_warn(ar, "received out of range peer_id %u tid %u\n",
3604 				    peer_id, tid);
3605 			continue;
3606 		}
3607 
3608 		spin_lock_bh(&ar->data_lock);
3609 		txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
3610 		spin_unlock_bh(&ar->data_lock);
3611 
3612 		/* It is okay to release the lock and use txq because RCU read
3613 		 * lock is held.
3614 		 */
3615 
3616 		if (unlikely(!txq)) {
3617 			ath10k_warn(ar, "failed to lookup txq for peer_id %u tid %u\n",
3618 				    peer_id, tid);
3619 			continue;
3620 		}
3621 
3622 		spin_lock_bh(&ar->htt.tx_lock);
3623 		artxq = (void *)txq->drv_priv;
3624 		artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
3625 		spin_unlock_bh(&ar->htt.tx_lock);
3626 	}
3627 
3628 	rcu_read_unlock();
3629 
3630 	ath10k_mac_tx_push_pending(ar);
3631 }
3632 
ath10k_htt_htc_t2h_msg_handler(struct ath10k * ar,struct sk_buff * skb)3633 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
3634 {
3635 	bool release;
3636 
3637 	release = ath10k_htt_t2h_msg_handler(ar, skb);
3638 
3639 	/* Free the indication buffer */
3640 	if (release)
3641 		dev_kfree_skb_any(skb);
3642 }
3643 
ath10k_get_legacy_rate_idx(struct ath10k * ar,u8 rate)3644 static inline s8 ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate)
3645 {
3646 	static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12,
3647 					  18, 24, 36, 48, 54};
3648 	int i;
3649 
3650 	for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) {
3651 		if (rate == legacy_rates[i])
3652 			return i;
3653 	}
3654 
3655 	ath10k_warn(ar, "Invalid legacy rate %d peer stats", rate);
3656 	return -EINVAL;
3657 }
3658 
3659 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)3660 ath10k_accumulate_per_peer_tx_stats(struct ath10k *ar,
3661 				    struct ath10k_sta *arsta,
3662 				    struct ath10k_per_peer_tx_stats *pstats,
3663 				    s8 legacy_rate_idx)
3664 {
3665 	struct rate_info *txrate = &arsta->txrate;
3666 	struct ath10k_htt_tx_stats *tx_stats;
3667 	int idx, ht_idx, gi, mcs, bw, nss;
3668 	unsigned long flags;
3669 
3670 	if (!arsta->tx_stats)
3671 		return;
3672 
3673 	tx_stats = arsta->tx_stats;
3674 	flags = txrate->flags;
3675 	gi = test_bit(ATH10K_RATE_INFO_FLAGS_SGI_BIT, &flags);
3676 	mcs = ATH10K_HW_MCS_RATE(pstats->ratecode);
3677 	bw = txrate->bw;
3678 	nss = txrate->nss;
3679 	ht_idx = mcs + (nss - 1) * 8;
3680 	idx = mcs * 8 + 8 * 10 * (nss - 1);
3681 	idx += bw * 2 + gi;
3682 
3683 #define STATS_OP_FMT(name) tx_stats->stats[ATH10K_STATS_TYPE_##name]
3684 
3685 	if (txrate->flags & RATE_INFO_FLAGS_VHT_MCS) {
3686 		STATS_OP_FMT(SUCC).vht[0][mcs] += pstats->succ_bytes;
3687 		STATS_OP_FMT(SUCC).vht[1][mcs] += pstats->succ_pkts;
3688 		STATS_OP_FMT(FAIL).vht[0][mcs] += pstats->failed_bytes;
3689 		STATS_OP_FMT(FAIL).vht[1][mcs] += pstats->failed_pkts;
3690 		STATS_OP_FMT(RETRY).vht[0][mcs] += pstats->retry_bytes;
3691 		STATS_OP_FMT(RETRY).vht[1][mcs] += pstats->retry_pkts;
3692 	} else if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3693 		STATS_OP_FMT(SUCC).ht[0][ht_idx] += pstats->succ_bytes;
3694 		STATS_OP_FMT(SUCC).ht[1][ht_idx] += pstats->succ_pkts;
3695 		STATS_OP_FMT(FAIL).ht[0][ht_idx] += pstats->failed_bytes;
3696 		STATS_OP_FMT(FAIL).ht[1][ht_idx] += pstats->failed_pkts;
3697 		STATS_OP_FMT(RETRY).ht[0][ht_idx] += pstats->retry_bytes;
3698 		STATS_OP_FMT(RETRY).ht[1][ht_idx] += pstats->retry_pkts;
3699 	} else {
3700 		mcs = legacy_rate_idx;
3701 
3702 		STATS_OP_FMT(SUCC).legacy[0][mcs] += pstats->succ_bytes;
3703 		STATS_OP_FMT(SUCC).legacy[1][mcs] += pstats->succ_pkts;
3704 		STATS_OP_FMT(FAIL).legacy[0][mcs] += pstats->failed_bytes;
3705 		STATS_OP_FMT(FAIL).legacy[1][mcs] += pstats->failed_pkts;
3706 		STATS_OP_FMT(RETRY).legacy[0][mcs] += pstats->retry_bytes;
3707 		STATS_OP_FMT(RETRY).legacy[1][mcs] += pstats->retry_pkts;
3708 	}
3709 
3710 	if (ATH10K_HW_AMPDU(pstats->flags)) {
3711 		tx_stats->ba_fails += ATH10K_HW_BA_FAIL(pstats->flags);
3712 
3713 		if (txrate->flags & RATE_INFO_FLAGS_MCS) {
3714 			STATS_OP_FMT(AMPDU).ht[0][ht_idx] +=
3715 				pstats->succ_bytes + pstats->retry_bytes;
3716 			STATS_OP_FMT(AMPDU).ht[1][ht_idx] +=
3717 				pstats->succ_pkts + pstats->retry_pkts;
3718 		} else {
3719 			STATS_OP_FMT(AMPDU).vht[0][mcs] +=
3720 				pstats->succ_bytes + pstats->retry_bytes;
3721 			STATS_OP_FMT(AMPDU).vht[1][mcs] +=
3722 				pstats->succ_pkts + pstats->retry_pkts;
3723 		}
3724 		STATS_OP_FMT(AMPDU).bw[0][bw] +=
3725 			pstats->succ_bytes + pstats->retry_bytes;
3726 		STATS_OP_FMT(AMPDU).nss[0][nss - 1] +=
3727 			pstats->succ_bytes + pstats->retry_bytes;
3728 		STATS_OP_FMT(AMPDU).gi[0][gi] +=
3729 			pstats->succ_bytes + pstats->retry_bytes;
3730 		STATS_OP_FMT(AMPDU).rate_table[0][idx] +=
3731 			pstats->succ_bytes + pstats->retry_bytes;
3732 		STATS_OP_FMT(AMPDU).bw[1][bw] +=
3733 			pstats->succ_pkts + pstats->retry_pkts;
3734 		STATS_OP_FMT(AMPDU).nss[1][nss - 1] +=
3735 			pstats->succ_pkts + pstats->retry_pkts;
3736 		STATS_OP_FMT(AMPDU).gi[1][gi] +=
3737 			pstats->succ_pkts + pstats->retry_pkts;
3738 		STATS_OP_FMT(AMPDU).rate_table[1][idx] +=
3739 			pstats->succ_pkts + pstats->retry_pkts;
3740 	} else {
3741 		tx_stats->ack_fails +=
3742 				ATH10K_HW_BA_FAIL(pstats->flags);
3743 	}
3744 
3745 	STATS_OP_FMT(SUCC).bw[0][bw] += pstats->succ_bytes;
3746 	STATS_OP_FMT(SUCC).nss[0][nss - 1] += pstats->succ_bytes;
3747 	STATS_OP_FMT(SUCC).gi[0][gi] += pstats->succ_bytes;
3748 
3749 	STATS_OP_FMT(SUCC).bw[1][bw] += pstats->succ_pkts;
3750 	STATS_OP_FMT(SUCC).nss[1][nss - 1] += pstats->succ_pkts;
3751 	STATS_OP_FMT(SUCC).gi[1][gi] += pstats->succ_pkts;
3752 
3753 	STATS_OP_FMT(FAIL).bw[0][bw] += pstats->failed_bytes;
3754 	STATS_OP_FMT(FAIL).nss[0][nss - 1] += pstats->failed_bytes;
3755 	STATS_OP_FMT(FAIL).gi[0][gi] += pstats->failed_bytes;
3756 
3757 	STATS_OP_FMT(FAIL).bw[1][bw] += pstats->failed_pkts;
3758 	STATS_OP_FMT(FAIL).nss[1][nss - 1] += pstats->failed_pkts;
3759 	STATS_OP_FMT(FAIL).gi[1][gi] += pstats->failed_pkts;
3760 
3761 	STATS_OP_FMT(RETRY).bw[0][bw] += pstats->retry_bytes;
3762 	STATS_OP_FMT(RETRY).nss[0][nss - 1] += pstats->retry_bytes;
3763 	STATS_OP_FMT(RETRY).gi[0][gi] += pstats->retry_bytes;
3764 
3765 	STATS_OP_FMT(RETRY).bw[1][bw] += pstats->retry_pkts;
3766 	STATS_OP_FMT(RETRY).nss[1][nss - 1] += pstats->retry_pkts;
3767 	STATS_OP_FMT(RETRY).gi[1][gi] += pstats->retry_pkts;
3768 
3769 	if (txrate->flags >= RATE_INFO_FLAGS_MCS) {
3770 		STATS_OP_FMT(SUCC).rate_table[0][idx] += pstats->succ_bytes;
3771 		STATS_OP_FMT(SUCC).rate_table[1][idx] += pstats->succ_pkts;
3772 		STATS_OP_FMT(FAIL).rate_table[0][idx] += pstats->failed_bytes;
3773 		STATS_OP_FMT(FAIL).rate_table[1][idx] += pstats->failed_pkts;
3774 		STATS_OP_FMT(RETRY).rate_table[0][idx] += pstats->retry_bytes;
3775 		STATS_OP_FMT(RETRY).rate_table[1][idx] += pstats->retry_pkts;
3776 	}
3777 
3778 	tx_stats->tx_duration += pstats->duration;
3779 }
3780 
3781 static void
ath10k_update_per_peer_tx_stats(struct ath10k * ar,struct ieee80211_sta * sta,struct ath10k_per_peer_tx_stats * peer_stats)3782 ath10k_update_per_peer_tx_stats(struct ath10k *ar,
3783 				struct ieee80211_sta *sta,
3784 				struct ath10k_per_peer_tx_stats *peer_stats)
3785 {
3786 	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
3787 	struct ieee80211_chanctx_conf *conf = NULL;
3788 	u8 rate = 0, sgi;
3789 	s8 rate_idx = 0;
3790 	bool skip_auto_rate;
3791 	struct rate_info txrate;
3792 
3793 	lockdep_assert_held(&ar->data_lock);
3794 
3795 	txrate.flags = ATH10K_HW_PREAMBLE(peer_stats->ratecode);
3796 	txrate.bw = ATH10K_HW_BW(peer_stats->flags);
3797 	txrate.nss = ATH10K_HW_NSS(peer_stats->ratecode);
3798 	txrate.mcs = ATH10K_HW_MCS_RATE(peer_stats->ratecode);
3799 	sgi = ATH10K_HW_GI(peer_stats->flags);
3800 	skip_auto_rate = ATH10K_FW_SKIPPED_RATE_CTRL(peer_stats->flags);
3801 
3802 	/* Firmware's rate control skips broadcast/management frames,
3803 	 * if host has configure fixed rates and in some other special cases.
3804 	 */
3805 	if (skip_auto_rate)
3806 		return;
3807 
3808 	if (txrate.flags == WMI_RATE_PREAMBLE_VHT && txrate.mcs > 9) {
3809 		ath10k_warn(ar, "Invalid VHT mcs %d peer stats",  txrate.mcs);
3810 		return;
3811 	}
3812 
3813 	if (txrate.flags == WMI_RATE_PREAMBLE_HT &&
3814 	    (txrate.mcs > 7 || txrate.nss < 1)) {
3815 		ath10k_warn(ar, "Invalid HT mcs %d nss %d peer stats",
3816 			    txrate.mcs, txrate.nss);
3817 		return;
3818 	}
3819 
3820 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
3821 	memset(&arsta->tx_info.status, 0, sizeof(arsta->tx_info.status));
3822 	if (txrate.flags == WMI_RATE_PREAMBLE_CCK ||
3823 	    txrate.flags == WMI_RATE_PREAMBLE_OFDM) {
3824 		rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode);
3825 		/* This is hacky, FW sends CCK rate 5.5Mbps as 6 */
3826 		if (rate == 6 && txrate.flags == WMI_RATE_PREAMBLE_CCK)
3827 			rate = 5;
3828 		rate_idx = ath10k_get_legacy_rate_idx(ar, rate);
3829 		if (rate_idx < 0)
3830 			return;
3831 		arsta->txrate.legacy = rate;
3832 	} else if (txrate.flags == WMI_RATE_PREAMBLE_HT) {
3833 		arsta->txrate.flags = RATE_INFO_FLAGS_MCS;
3834 		arsta->txrate.mcs = txrate.mcs + 8 * (txrate.nss - 1);
3835 	} else {
3836 		arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS;
3837 		arsta->txrate.mcs = txrate.mcs;
3838 	}
3839 
3840 	switch (txrate.flags) {
3841 	case WMI_RATE_PREAMBLE_OFDM:
3842 		if (arsta->arvif && arsta->arvif->vif)
3843 			conf = rcu_dereference(arsta->arvif->vif->bss_conf.chanctx_conf);
3844 		if (conf && conf->def.chan->band == NL80211_BAND_5GHZ)
3845 			arsta->tx_info.status.rates[0].idx = rate_idx - 4;
3846 		break;
3847 	case WMI_RATE_PREAMBLE_CCK:
3848 		arsta->tx_info.status.rates[0].idx = rate_idx;
3849 		if (sgi)
3850 			arsta->tx_info.status.rates[0].flags |=
3851 				(IEEE80211_TX_RC_USE_SHORT_PREAMBLE |
3852 				 IEEE80211_TX_RC_SHORT_GI);
3853 		break;
3854 	case WMI_RATE_PREAMBLE_HT:
3855 		arsta->tx_info.status.rates[0].idx =
3856 				txrate.mcs + ((txrate.nss - 1) * 8);
3857 		if (sgi)
3858 			arsta->tx_info.status.rates[0].flags |=
3859 					IEEE80211_TX_RC_SHORT_GI;
3860 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_MCS;
3861 		break;
3862 	case WMI_RATE_PREAMBLE_VHT:
3863 		ieee80211_rate_set_vht(&arsta->tx_info.status.rates[0],
3864 				       txrate.mcs, txrate.nss);
3865 		if (sgi)
3866 			arsta->tx_info.status.rates[0].flags |=
3867 						IEEE80211_TX_RC_SHORT_GI;
3868 		arsta->tx_info.status.rates[0].flags |= IEEE80211_TX_RC_VHT_MCS;
3869 		break;
3870 	}
3871 
3872 	arsta->txrate.nss = txrate.nss;
3873 	arsta->txrate.bw = ath10k_bw_to_mac80211_bw(txrate.bw);
3874 	arsta->last_tx_bitrate = cfg80211_calculate_bitrate(&arsta->txrate);
3875 	if (sgi)
3876 		arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
3877 
3878 	switch (arsta->txrate.bw) {
3879 	case RATE_INFO_BW_40:
3880 		arsta->tx_info.status.rates[0].flags |=
3881 				IEEE80211_TX_RC_40_MHZ_WIDTH;
3882 		break;
3883 	case RATE_INFO_BW_80:
3884 		arsta->tx_info.status.rates[0].flags |=
3885 				IEEE80211_TX_RC_80_MHZ_WIDTH;
3886 		break;
3887 	}
3888 
3889 	if (peer_stats->succ_pkts) {
3890 		arsta->tx_info.flags = IEEE80211_TX_STAT_ACK;
3891 		arsta->tx_info.status.rates[0].count = 1;
3892 		ieee80211_tx_rate_update(ar->hw, sta, &arsta->tx_info);
3893 	}
3894 
3895 	if (ar->htt.disable_tx_comp) {
3896 		arsta->tx_failed += peer_stats->failed_pkts;
3897 		ath10k_dbg(ar, ATH10K_DBG_HTT, "tx failed %d\n",
3898 			   arsta->tx_failed);
3899 	}
3900 
3901 	arsta->tx_retries += peer_stats->retry_pkts;
3902 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx retries %d", arsta->tx_retries);
3903 
3904 	if (ath10k_debug_is_extd_tx_stats_enabled(ar))
3905 		ath10k_accumulate_per_peer_tx_stats(ar, arsta, peer_stats,
3906 						    rate_idx);
3907 }
3908 
ath10k_htt_fetch_peer_stats(struct ath10k * ar,struct sk_buff * skb)3909 static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
3910 					struct sk_buff *skb)
3911 {
3912 	struct htt_resp *resp = (struct htt_resp *)skb->data;
3913 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3914 	struct htt_per_peer_tx_stats_ind *tx_stats;
3915 	struct ieee80211_sta *sta;
3916 	struct ath10k_peer *peer;
3917 	int peer_id, i;
3918 	u8 ppdu_len, num_ppdu;
3919 
3920 	num_ppdu = resp->peer_tx_stats.num_ppdu;
3921 	ppdu_len = resp->peer_tx_stats.ppdu_len * sizeof(__le32);
3922 
3923 	if (skb->len < sizeof(struct htt_resp_hdr) + num_ppdu * ppdu_len) {
3924 		ath10k_warn(ar, "Invalid peer stats buf length %d\n", skb->len);
3925 		return;
3926 	}
3927 
3928 	tx_stats = (struct htt_per_peer_tx_stats_ind *)
3929 			(resp->peer_tx_stats.payload);
3930 	peer_id = __le16_to_cpu(tx_stats->peer_id);
3931 
3932 	rcu_read_lock();
3933 	spin_lock_bh(&ar->data_lock);
3934 	peer = ath10k_peer_find_by_id(ar, peer_id);
3935 	if (!peer || !peer->sta) {
3936 		ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n",
3937 			    peer_id);
3938 		goto out;
3939 	}
3940 
3941 	sta = peer->sta;
3942 	for (i = 0; i < num_ppdu; i++) {
3943 		tx_stats = (struct htt_per_peer_tx_stats_ind *)
3944 			   (resp->peer_tx_stats.payload + i * ppdu_len);
3945 
3946 		p_tx_stats->succ_bytes = __le32_to_cpu(tx_stats->succ_bytes);
3947 		p_tx_stats->retry_bytes = __le32_to_cpu(tx_stats->retry_bytes);
3948 		p_tx_stats->failed_bytes =
3949 				__le32_to_cpu(tx_stats->failed_bytes);
3950 		p_tx_stats->ratecode = tx_stats->ratecode;
3951 		p_tx_stats->flags = tx_stats->flags;
3952 		p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts);
3953 		p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts);
3954 		p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts);
3955 		p_tx_stats->duration = __le16_to_cpu(tx_stats->tx_duration);
3956 
3957 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
3958 	}
3959 
3960 out:
3961 	spin_unlock_bh(&ar->data_lock);
3962 	rcu_read_unlock();
3963 }
3964 
ath10k_fetch_10_2_tx_stats(struct ath10k * ar,u8 * data)3965 static void ath10k_fetch_10_2_tx_stats(struct ath10k *ar, u8 *data)
3966 {
3967 	struct ath10k_pktlog_hdr *hdr = (struct ath10k_pktlog_hdr *)data;
3968 	struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats;
3969 	struct ath10k_10_2_peer_tx_stats *tx_stats;
3970 	struct ieee80211_sta *sta;
3971 	struct ath10k_peer *peer;
3972 	u16 log_type = __le16_to_cpu(hdr->log_type);
3973 	u32 peer_id = 0, i;
3974 
3975 	if (log_type != ATH_PKTLOG_TYPE_TX_STAT)
3976 		return;
3977 
3978 	tx_stats = (struct ath10k_10_2_peer_tx_stats *)((hdr->payload) +
3979 		    ATH10K_10_2_TX_STATS_OFFSET);
3980 
3981 	if (!tx_stats->tx_ppdu_cnt)
3982 		return;
3983 
3984 	peer_id = tx_stats->peer_id;
3985 
3986 	rcu_read_lock();
3987 	spin_lock_bh(&ar->data_lock);
3988 	peer = ath10k_peer_find_by_id(ar, peer_id);
3989 	if (!peer || !peer->sta) {
3990 		ath10k_warn(ar, "Invalid peer id %d in peer stats buffer\n",
3991 			    peer_id);
3992 		goto out;
3993 	}
3994 
3995 	sta = peer->sta;
3996 	for (i = 0; i < tx_stats->tx_ppdu_cnt; i++) {
3997 		p_tx_stats->succ_bytes =
3998 			__le16_to_cpu(tx_stats->success_bytes[i]);
3999 		p_tx_stats->retry_bytes =
4000 			__le16_to_cpu(tx_stats->retry_bytes[i]);
4001 		p_tx_stats->failed_bytes =
4002 			__le16_to_cpu(tx_stats->failed_bytes[i]);
4003 		p_tx_stats->ratecode = tx_stats->ratecode[i];
4004 		p_tx_stats->flags = tx_stats->flags[i];
4005 		p_tx_stats->succ_pkts = tx_stats->success_pkts[i];
4006 		p_tx_stats->retry_pkts = tx_stats->retry_pkts[i];
4007 		p_tx_stats->failed_pkts = tx_stats->failed_pkts[i];
4008 
4009 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
4010 	}
4011 	spin_unlock_bh(&ar->data_lock);
4012 	rcu_read_unlock();
4013 
4014 	return;
4015 
4016 out:
4017 	spin_unlock_bh(&ar->data_lock);
4018 	rcu_read_unlock();
4019 }
4020 
ath10k_htt_rx_pn_len(enum htt_security_types sec_type)4021 static int ath10k_htt_rx_pn_len(enum htt_security_types sec_type)
4022 {
4023 	switch (sec_type) {
4024 	case HTT_SECURITY_TKIP:
4025 	case HTT_SECURITY_TKIP_NOMIC:
4026 	case HTT_SECURITY_AES_CCMP:
4027 		return 48;
4028 	default:
4029 		return 0;
4030 	}
4031 }
4032 
ath10k_htt_rx_sec_ind_handler(struct ath10k * ar,struct htt_security_indication * ev)4033 static void ath10k_htt_rx_sec_ind_handler(struct ath10k *ar,
4034 					  struct htt_security_indication *ev)
4035 {
4036 	enum htt_txrx_sec_cast_type sec_index;
4037 	enum htt_security_types sec_type;
4038 	struct ath10k_peer *peer;
4039 
4040 	spin_lock_bh(&ar->data_lock);
4041 
4042 	peer = ath10k_peer_find_by_id(ar, __le16_to_cpu(ev->peer_id));
4043 	if (!peer) {
4044 		ath10k_warn(ar, "failed to find peer id %d for security indication",
4045 			    __le16_to_cpu(ev->peer_id));
4046 		goto out;
4047 	}
4048 
4049 	sec_type = MS(ev->flags, HTT_SECURITY_TYPE);
4050 
4051 	if (ev->flags & HTT_SECURITY_IS_UNICAST)
4052 		sec_index = HTT_TXRX_SEC_UCAST;
4053 	else
4054 		sec_index = HTT_TXRX_SEC_MCAST;
4055 
4056 	peer->rx_pn[sec_index].sec_type = sec_type;
4057 	peer->rx_pn[sec_index].pn_len = ath10k_htt_rx_pn_len(sec_type);
4058 
4059 	memset(peer->tids_last_pn_valid, 0, sizeof(peer->tids_last_pn_valid));
4060 	memset(peer->tids_last_pn, 0, sizeof(peer->tids_last_pn));
4061 
4062 out:
4063 	spin_unlock_bh(&ar->data_lock);
4064 }
4065 
ath10k_htt_t2h_msg_handler(struct ath10k * ar,struct sk_buff * skb)4066 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
4067 {
4068 	struct ath10k_htt *htt = &ar->htt;
4069 	struct htt_resp *resp = (struct htt_resp *)skb->data;
4070 	enum htt_t2h_msg_type type;
4071 
4072 	/* confirm alignment */
4073 	if (!IS_ALIGNED((unsigned long)skb->data, 4))
4074 		ath10k_warn(ar, "unaligned htt message, expect trouble\n");
4075 
4076 	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
4077 		   resp->hdr.msg_type);
4078 
4079 	if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
4080 		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
4081 			   resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
4082 		return true;
4083 	}
4084 	type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
4085 
4086 	switch (type) {
4087 	case HTT_T2H_MSG_TYPE_VERSION_CONF: {
4088 		htt->target_version_major = resp->ver_resp.major;
4089 		htt->target_version_minor = resp->ver_resp.minor;
4090 		complete(&htt->target_version_received);
4091 		break;
4092 	}
4093 	case HTT_T2H_MSG_TYPE_RX_IND:
4094 		if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL) {
4095 			ath10k_htt_rx_proc_rx_ind_ll(htt, &resp->rx_ind);
4096 		} else {
4097 			skb_queue_tail(&htt->rx_indication_head, skb);
4098 			return false;
4099 		}
4100 		break;
4101 	case HTT_T2H_MSG_TYPE_PEER_MAP: {
4102 		struct htt_peer_map_event ev = {
4103 			.vdev_id = resp->peer_map.vdev_id,
4104 			.peer_id = __le16_to_cpu(resp->peer_map.peer_id),
4105 		};
4106 		memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
4107 		ath10k_peer_map_event(htt, &ev);
4108 		break;
4109 	}
4110 	case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
4111 		struct htt_peer_unmap_event ev = {
4112 			.peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
4113 		};
4114 		ath10k_peer_unmap_event(htt, &ev);
4115 		break;
4116 	}
4117 	case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
4118 		struct htt_tx_done tx_done = {};
4119 		struct ath10k_htt *htt = &ar->htt;
4120 		struct ath10k_htc *htc = &ar->htc;
4121 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
4122 		int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
4123 		int info = __le32_to_cpu(resp->mgmt_tx_completion.info);
4124 
4125 		tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
4126 
4127 		switch (status) {
4128 		case HTT_MGMT_TX_STATUS_OK:
4129 			tx_done.status = HTT_TX_COMPL_STATE_ACK;
4130 			if (test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS,
4131 				     ar->wmi.svc_map) &&
4132 			    (resp->mgmt_tx_completion.flags &
4133 			     HTT_MGMT_TX_CMPL_FLAG_ACK_RSSI)) {
4134 				tx_done.ack_rssi =
4135 				FIELD_GET(HTT_MGMT_TX_CMPL_INFO_ACK_RSSI_MASK,
4136 					  info);
4137 			}
4138 			break;
4139 		case HTT_MGMT_TX_STATUS_RETRY:
4140 			tx_done.status = HTT_TX_COMPL_STATE_NOACK;
4141 			break;
4142 		case HTT_MGMT_TX_STATUS_DROP:
4143 			tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
4144 			break;
4145 		}
4146 
4147 		if (htt->disable_tx_comp) {
4148 			spin_lock_bh(&htc->tx_lock);
4149 			ep->tx_credits++;
4150 			spin_unlock_bh(&htc->tx_lock);
4151 		}
4152 
4153 		status = ath10k_txrx_tx_unref(htt, &tx_done);
4154 		if (!status) {
4155 			spin_lock_bh(&htt->tx_lock);
4156 			ath10k_htt_tx_mgmt_dec_pending(htt);
4157 			spin_unlock_bh(&htt->tx_lock);
4158 		}
4159 		break;
4160 	}
4161 	case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
4162 		ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
4163 		break;
4164 	case HTT_T2H_MSG_TYPE_SEC_IND: {
4165 		struct ath10k *ar = htt->ar;
4166 		struct htt_security_indication *ev = &resp->security_indication;
4167 
4168 		ath10k_htt_rx_sec_ind_handler(ar, ev);
4169 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4170 			   "sec ind peer_id %d unicast %d type %d\n",
4171 			  __le16_to_cpu(ev->peer_id),
4172 			  !!(ev->flags & HTT_SECURITY_IS_UNICAST),
4173 			  MS(ev->flags, HTT_SECURITY_TYPE));
4174 		complete(&ar->install_key_done);
4175 		break;
4176 	}
4177 	case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
4178 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
4179 				skb->data, skb->len);
4180 		atomic_inc(&htt->num_mpdus_ready);
4181 
4182 		return ath10k_htt_rx_proc_rx_frag_ind(htt,
4183 						      &resp->rx_frag_ind,
4184 						      skb);
4185 	}
4186 	case HTT_T2H_MSG_TYPE_TEST:
4187 		break;
4188 	case HTT_T2H_MSG_TYPE_STATS_CONF:
4189 		trace_ath10k_htt_stats(ar, skb->data, skb->len);
4190 		break;
4191 	case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
4192 		/* Firmware can return tx frames if it's unable to fully
4193 		 * process them and suspects host may be able to fix it. ath10k
4194 		 * sends all tx frames as already inspected so this shouldn't
4195 		 * happen unless fw has a bug.
4196 		 */
4197 		ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
4198 		break;
4199 	case HTT_T2H_MSG_TYPE_RX_ADDBA:
4200 		ath10k_htt_rx_addba(ar, resp);
4201 		break;
4202 	case HTT_T2H_MSG_TYPE_RX_DELBA:
4203 		ath10k_htt_rx_delba(ar, resp);
4204 		break;
4205 	case HTT_T2H_MSG_TYPE_PKTLOG: {
4206 		trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
4207 					skb->len -
4208 					offsetof(struct htt_resp,
4209 						 pktlog_msg.payload));
4210 
4211 		if (ath10k_peer_stats_enabled(ar))
4212 			ath10k_fetch_10_2_tx_stats(ar,
4213 						   resp->pktlog_msg.payload);
4214 		break;
4215 	}
4216 	case HTT_T2H_MSG_TYPE_RX_FLUSH: {
4217 		/* Ignore this event because mac80211 takes care of Rx
4218 		 * aggregation reordering.
4219 		 */
4220 		break;
4221 	}
4222 	case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
4223 		skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
4224 		return false;
4225 	}
4226 	case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND: {
4227 		struct ath10k_htt *htt = &ar->htt;
4228 		struct ath10k_htc *htc = &ar->htc;
4229 		struct ath10k_htc_ep *ep = &ar->htc.endpoint[htt->eid];
4230 		u32 msg_word = __le32_to_cpu(*(__le32 *)resp);
4231 		int htt_credit_delta;
4232 
4233 		htt_credit_delta = HTT_TX_CREDIT_DELTA_ABS_GET(msg_word);
4234 		if (HTT_TX_CREDIT_SIGN_BIT_GET(msg_word))
4235 			htt_credit_delta = -htt_credit_delta;
4236 
4237 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4238 			   "htt credit update delta %d\n",
4239 			   htt_credit_delta);
4240 
4241 		if (htt->disable_tx_comp) {
4242 			spin_lock_bh(&htc->tx_lock);
4243 			ep->tx_credits += htt_credit_delta;
4244 			spin_unlock_bh(&htc->tx_lock);
4245 			ath10k_dbg(ar, ATH10K_DBG_HTT,
4246 				   "htt credit total %d\n",
4247 				   ep->tx_credits);
4248 			ep->ep_ops.ep_tx_credits(htc->ar);
4249 		}
4250 		break;
4251 	}
4252 	case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
4253 		u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
4254 		u32 freq = __le32_to_cpu(resp->chan_change.freq);
4255 
4256 		ar->tgt_oper_chan = ieee80211_get_channel(ar->hw->wiphy, freq);
4257 		ath10k_dbg(ar, ATH10K_DBG_HTT,
4258 			   "htt chan change freq %u phymode %s\n",
4259 			   freq, ath10k_wmi_phymode_str(phymode));
4260 		break;
4261 	}
4262 	case HTT_T2H_MSG_TYPE_AGGR_CONF:
4263 		break;
4264 	case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
4265 		struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
4266 
4267 		if (!tx_fetch_ind) {
4268 			ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
4269 			break;
4270 		}
4271 		skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
4272 		break;
4273 	}
4274 	case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
4275 		ath10k_htt_rx_tx_fetch_confirm(ar, skb);
4276 		break;
4277 	case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
4278 		ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
4279 		break;
4280 	case HTT_T2H_MSG_TYPE_PEER_STATS:
4281 		ath10k_htt_fetch_peer_stats(ar, skb);
4282 		break;
4283 	case HTT_T2H_MSG_TYPE_EN_STATS:
4284 	default:
4285 		ath10k_warn(ar, "htt event (%d) not handled\n",
4286 			    resp->hdr.msg_type);
4287 		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
4288 				skb->data, skb->len);
4289 		break;
4290 	}
4291 	return true;
4292 }
4293 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
4294 
ath10k_htt_rx_pktlog_completion_handler(struct ath10k * ar,struct sk_buff * skb)4295 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
4296 					     struct sk_buff *skb)
4297 {
4298 	trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
4299 	dev_kfree_skb_any(skb);
4300 }
4301 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
4302 
ath10k_htt_rx_deliver_msdu(struct ath10k * ar,int quota,int budget)4303 static int ath10k_htt_rx_deliver_msdu(struct ath10k *ar, int quota, int budget)
4304 {
4305 	struct sk_buff *skb;
4306 
4307 	while (quota < budget) {
4308 		if (skb_queue_empty(&ar->htt.rx_msdus_q))
4309 			break;
4310 
4311 		skb = skb_dequeue(&ar->htt.rx_msdus_q);
4312 		if (!skb)
4313 			break;
4314 		ath10k_process_rx(ar, skb);
4315 		quota++;
4316 	}
4317 
4318 	return quota;
4319 }
4320 
ath10k_htt_rx_hl_indication(struct ath10k * ar,int budget)4321 int ath10k_htt_rx_hl_indication(struct ath10k *ar, int budget)
4322 {
4323 	struct htt_resp *resp;
4324 	struct ath10k_htt *htt = &ar->htt;
4325 	struct sk_buff *skb;
4326 	bool release;
4327 	int quota;
4328 
4329 	for (quota = 0; quota < budget; quota++) {
4330 		skb = skb_dequeue(&htt->rx_indication_head);
4331 		if (!skb)
4332 			break;
4333 
4334 		resp = (struct htt_resp *)skb->data;
4335 
4336 		release = ath10k_htt_rx_proc_rx_ind_hl(htt,
4337 						       &resp->rx_ind_hl,
4338 						       skb,
4339 						       HTT_RX_PN_CHECK,
4340 						       HTT_RX_NON_TKIP_MIC);
4341 
4342 		if (release)
4343 			dev_kfree_skb_any(skb);
4344 
4345 		ath10k_dbg(ar, ATH10K_DBG_HTT, "rx indication poll pending count:%d\n",
4346 			   skb_queue_len(&htt->rx_indication_head));
4347 	}
4348 	return quota;
4349 }
4350 EXPORT_SYMBOL(ath10k_htt_rx_hl_indication);
4351 
ath10k_htt_txrx_compl_task(struct ath10k * ar,int budget)4352 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
4353 {
4354 	struct ath10k_htt *htt = &ar->htt;
4355 	struct htt_tx_done tx_done = {};
4356 	struct sk_buff_head tx_ind_q;
4357 	struct sk_buff *skb;
4358 	unsigned long flags;
4359 	int quota = 0, done, ret;
4360 	bool resched_napi = false;
4361 
4362 	__skb_queue_head_init(&tx_ind_q);
4363 
4364 	/* Process pending frames before dequeuing more data
4365 	 * from hardware.
4366 	 */
4367 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4368 	if (quota == budget) {
4369 		resched_napi = true;
4370 		goto exit;
4371 	}
4372 
4373 	while ((skb = skb_dequeue(&htt->rx_in_ord_compl_q))) {
4374 		spin_lock_bh(&htt->rx_ring.lock);
4375 		ret = ath10k_htt_rx_in_ord_ind(ar, skb);
4376 		spin_unlock_bh(&htt->rx_ring.lock);
4377 
4378 		dev_kfree_skb_any(skb);
4379 		if (ret == -EIO) {
4380 			resched_napi = true;
4381 			goto exit;
4382 		}
4383 	}
4384 
4385 	while (atomic_read(&htt->num_mpdus_ready)) {
4386 		ret = ath10k_htt_rx_handle_amsdu(htt);
4387 		if (ret == -EIO) {
4388 			resched_napi = true;
4389 			goto exit;
4390 		}
4391 		atomic_dec(&htt->num_mpdus_ready);
4392 	}
4393 
4394 	/* Deliver received data after processing data from hardware */
4395 	quota = ath10k_htt_rx_deliver_msdu(ar, quota, budget);
4396 
4397 	/* From NAPI documentation:
4398 	 *  The napi poll() function may also process TX completions, in which
4399 	 *  case if it processes the entire TX ring then it should count that
4400 	 *  work as the rest of the budget.
4401 	 */
4402 	if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo))
4403 		quota = budget;
4404 
4405 	/* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
4406 	 * From kfifo_get() documentation:
4407 	 *  Note that with only one concurrent reader and one concurrent writer,
4408 	 *  you don't need extra locking to use these macro.
4409 	 */
4410 	while (kfifo_get(&htt->txdone_fifo, &tx_done))
4411 		ath10k_txrx_tx_unref(htt, &tx_done);
4412 
4413 	ath10k_mac_tx_push_pending(ar);
4414 
4415 	spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
4416 	skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
4417 	spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
4418 
4419 	while ((skb = __skb_dequeue(&tx_ind_q))) {
4420 		ath10k_htt_rx_tx_fetch_ind(ar, skb);
4421 		dev_kfree_skb_any(skb);
4422 	}
4423 
4424 exit:
4425 	ath10k_htt_rx_msdu_buff_replenish(htt);
4426 	/* In case of rx failure or more data to read, report budget
4427 	 * to reschedule NAPI poll
4428 	 */
4429 	done = resched_napi ? budget : quota;
4430 
4431 	return done;
4432 }
4433 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);
4434 
4435 static const struct ath10k_htt_rx_ops htt_rx_ops_32 = {
4436 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_32,
4437 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_32,
4438 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_32,
4439 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_32,
4440 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_32,
4441 };
4442 
4443 static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
4444 	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_64,
4445 	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_64,
4446 	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_64,
4447 	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_64,
4448 	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
4449 };
4450 
4451 static const struct ath10k_htt_rx_ops htt_rx_ops_hl = {
4452 	.htt_rx_proc_rx_frag_ind = ath10k_htt_rx_proc_rx_frag_ind_hl,
4453 };
4454 
ath10k_htt_set_rx_ops(struct ath10k_htt * htt)4455 void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
4456 {
4457 	struct ath10k *ar = htt->ar;
4458 
4459 	if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
4460 		htt->rx_ops = &htt_rx_ops_hl;
4461 	else if (ar->hw_params.target_64bit)
4462 		htt->rx_ops = &htt_rx_ops_64;
4463 	else
4464 		htt->rx_ops = &htt_rx_ops_32;
4465 }
4466