2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 #include <linux/log2.h>
28 #define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
29 #define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
31 /* when under memory pressure rx ring refill may fail and needs a retry */
32 #define HTT_RX_RING_REFILL_RETRY_MS 50
34 #define HTT_RX_RING_REFILL_RESCHED_MS 5
36 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
38 static struct sk_buff *
39 ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 paddr)
41 struct ath10k_skb_rxcb *rxcb;
43 hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
44 if (rxcb->paddr == paddr)
45 return ATH10K_RXCB_SKB(rxcb);
51 static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
54 struct ath10k_skb_rxcb *rxcb;
58 if (htt->rx_ring.in_ord_rx) {
59 hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
60 skb = ATH10K_RXCB_SKB(rxcb);
61 dma_unmap_single(htt->ar->dev, rxcb->paddr,
62 skb->len + skb_tailroom(skb),
64 hash_del(&rxcb->hlist);
65 dev_kfree_skb_any(skb);
68 for (i = 0; i < htt->rx_ring.size; i++) {
69 skb = htt->rx_ring.netbufs_ring[i];
73 rxcb = ATH10K_SKB_RXCB(skb);
74 dma_unmap_single(htt->ar->dev, rxcb->paddr,
75 skb->len + skb_tailroom(skb),
77 dev_kfree_skb_any(skb);
81 htt->rx_ring.fill_cnt = 0;
82 hash_init(htt->rx_ring.skb_table);
83 memset(htt->rx_ring.netbufs_ring, 0,
84 htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
87 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
89 struct htt_rx_desc *rx_desc;
90 struct ath10k_skb_rxcb *rxcb;
95 /* The Full Rx Reorder firmware has no way of telling the host
96 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
97 * To keep things simple make sure ring is always half empty. This
98 * guarantees there'll be no replenishment overruns possible.
100 BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);
102 idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
104 skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
110 if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
112 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
115 /* Clear rx_desc attention word before posting to Rx ring */
116 rx_desc = (struct htt_rx_desc *)skb->data;
117 rx_desc->attention.flags = __cpu_to_le32(0);
119 paddr = dma_map_single(htt->ar->dev, skb->data,
120 skb->len + skb_tailroom(skb),
123 if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
124 dev_kfree_skb_any(skb);
129 rxcb = ATH10K_SKB_RXCB(skb);
131 htt->rx_ring.netbufs_ring[idx] = skb;
132 htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
133 htt->rx_ring.fill_cnt++;
135 if (htt->rx_ring.in_ord_rx) {
136 hash_add(htt->rx_ring.skb_table,
137 &ATH10K_SKB_RXCB(skb)->hlist,
143 idx &= htt->rx_ring.size_mask;
148 * Make sure the rx buffer is updated before available buffer
149 * index to avoid any potential rx ring corruption.
152 *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
156 static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
158 lockdep_assert_held(&htt->rx_ring.lock);
159 return __ath10k_htt_rx_ring_fill_n(htt, num);
162 static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
164 int ret, num_deficit, num_to_fill;
166 /* Refilling the whole RX ring buffer proves to be a bad idea. The
167 * reason is RX may take up significant amount of CPU cycles and starve
168 * other tasks, e.g. TX on an ethernet device while acting as a bridge
169 * with ath10k wlan interface. This ended up with very poor performance
170 * once CPU the host system was overwhelmed with RX on ath10k.
172 * By limiting the number of refills the replenishing occurs
173 * progressively. This in turns makes use of the fact tasklets are
174 * processed in FIFO order. This means actual RX processing can starve
175 * out refilling. If there's not enough buffers on RX ring FW will not
176 * report RX until it is refilled with enough buffers. This
177 * automatically balances load wrt to CPU power.
179 * This probably comes at a cost of lower maximum throughput but
180 * improves the average and stability. */
181 spin_lock_bh(&htt->rx_ring.lock);
182 num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
183 num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
184 num_deficit -= num_to_fill;
185 ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
186 if (ret == -ENOMEM) {
188 * Failed to fill it to the desired level -
189 * we'll start a timer and try again next time.
190 * As long as enough buffers are left in the ring for
191 * another A-MPDU rx, no special recovery is needed.
193 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
194 msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
195 } else if (num_deficit > 0) {
196 mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
197 msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS));
199 spin_unlock_bh(&htt->rx_ring.lock);
202 static void ath10k_htt_rx_ring_refill_retry(unsigned long arg)
204 struct ath10k_htt *htt = (struct ath10k_htt *)arg;
206 ath10k_htt_rx_msdu_buff_replenish(htt);
209 int ath10k_htt_rx_ring_refill(struct ath10k *ar)
211 struct ath10k_htt *htt = &ar->htt;
214 spin_lock_bh(&htt->rx_ring.lock);
215 ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
216 htt->rx_ring.fill_cnt));
217 spin_unlock_bh(&htt->rx_ring.lock);
220 ath10k_htt_rx_ring_free(htt);
225 void ath10k_htt_rx_free(struct ath10k_htt *htt)
227 del_timer_sync(&htt->rx_ring.refill_retry_timer);
229 skb_queue_purge(&htt->rx_compl_q);
230 skb_queue_purge(&htt->rx_in_ord_compl_q);
231 skb_queue_purge(&htt->tx_fetch_ind_q);
233 ath10k_htt_rx_ring_free(htt);
235 dma_free_coherent(htt->ar->dev,
237 sizeof(htt->rx_ring.paddrs_ring)),
238 htt->rx_ring.paddrs_ring,
239 htt->rx_ring.base_paddr);
241 dma_free_coherent(htt->ar->dev,
242 sizeof(*htt->rx_ring.alloc_idx.vaddr),
243 htt->rx_ring.alloc_idx.vaddr,
244 htt->rx_ring.alloc_idx.paddr);
246 kfree(htt->rx_ring.netbufs_ring);
249 static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
251 struct ath10k *ar = htt->ar;
253 struct sk_buff *msdu;
255 lockdep_assert_held(&htt->rx_ring.lock);
257 if (htt->rx_ring.fill_cnt == 0) {
258 ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
262 idx = htt->rx_ring.sw_rd_idx.msdu_payld;
263 msdu = htt->rx_ring.netbufs_ring[idx];
264 htt->rx_ring.netbufs_ring[idx] = NULL;
265 htt->rx_ring.paddrs_ring[idx] = 0;
268 idx &= htt->rx_ring.size_mask;
269 htt->rx_ring.sw_rd_idx.msdu_payld = idx;
270 htt->rx_ring.fill_cnt--;
272 dma_unmap_single(htt->ar->dev,
273 ATH10K_SKB_RXCB(msdu)->paddr,
274 msdu->len + skb_tailroom(msdu),
276 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
277 msdu->data, msdu->len + skb_tailroom(msdu));
282 /* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
283 static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
284 struct sk_buff_head *amsdu)
286 struct ath10k *ar = htt->ar;
287 int msdu_len, msdu_chaining = 0;
288 struct sk_buff *msdu;
289 struct htt_rx_desc *rx_desc;
291 lockdep_assert_held(&htt->rx_ring.lock);
294 int last_msdu, msdu_len_invalid, msdu_chained;
296 msdu = ath10k_htt_rx_netbuf_pop(htt);
298 __skb_queue_purge(amsdu);
302 __skb_queue_tail(amsdu, msdu);
304 rx_desc = (struct htt_rx_desc *)msdu->data;
306 /* FIXME: we must report msdu payload since this is what caller
308 skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
309 skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));
312 * Sanity check - confirm the HW is finished filling in the
314 * If the HW and SW are working correctly, then it's guaranteed
315 * that the HW's MAC DMA is done before this point in the SW.
316 * To prevent the case that we handle a stale Rx descriptor,
317 * just assert for now until we have a way to recover.
319 if (!(__le32_to_cpu(rx_desc->attention.flags)
320 & RX_ATTENTION_FLAGS_MSDU_DONE)) {
321 __skb_queue_purge(amsdu);
325 msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
326 & (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
327 RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
328 msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
329 RX_MSDU_START_INFO0_MSDU_LENGTH);
330 msdu_chained = rx_desc->frag_info.ring2_more_count;
332 if (msdu_len_invalid)
336 skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
337 msdu_len -= msdu->len;
339 /* Note: Chained buffers do not contain rx descriptor */
340 while (msdu_chained--) {
341 msdu = ath10k_htt_rx_netbuf_pop(htt);
343 __skb_queue_purge(amsdu);
347 __skb_queue_tail(amsdu, msdu);
349 skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
350 msdu_len -= msdu->len;
354 last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
355 RX_MSDU_END_INFO0_LAST_MSDU;
357 trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
358 sizeof(*rx_desc) - sizeof(u32));
364 if (skb_queue_empty(amsdu))
368 * Don't refill the ring yet.
370 * First, the elements popped here are still in use - it is not
371 * safe to overwrite them until the matching call to
372 * mpdu_desc_list_next. Second, for efficiency it is preferable to
373 * refill the rx ring with 1 PPDU's worth of rx buffers (something
374 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
375 * (something like 3 buffers). Consequently, we'll rely on the txrx
376 * SW to tell us when it is done pulling all the PPDU's rx buffers
377 * out of the rx ring, and then refill it just once.
380 return msdu_chaining;
383 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
386 struct ath10k *ar = htt->ar;
387 struct ath10k_skb_rxcb *rxcb;
388 struct sk_buff *msdu;
390 lockdep_assert_held(&htt->rx_ring.lock);
392 msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
396 rxcb = ATH10K_SKB_RXCB(msdu);
397 hash_del(&rxcb->hlist);
398 htt->rx_ring.fill_cnt--;
400 dma_unmap_single(htt->ar->dev, rxcb->paddr,
401 msdu->len + skb_tailroom(msdu),
403 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
404 msdu->data, msdu->len + skb_tailroom(msdu));
409 static int ath10k_htt_rx_pop_paddr_list(struct ath10k_htt *htt,
410 struct htt_rx_in_ord_ind *ev,
411 struct sk_buff_head *list)
413 struct ath10k *ar = htt->ar;
414 struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs;
415 struct htt_rx_desc *rxd;
416 struct sk_buff *msdu;
421 lockdep_assert_held(&htt->rx_ring.lock);
423 msdu_count = __le16_to_cpu(ev->msdu_count);
424 is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
426 while (msdu_count--) {
427 paddr = __le32_to_cpu(msdu_desc->msdu_paddr);
429 msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
431 __skb_queue_purge(list);
435 __skb_queue_tail(list, msdu);
438 rxd = (void *)msdu->data;
440 trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
442 skb_put(msdu, sizeof(*rxd));
443 skb_pull(msdu, sizeof(*rxd));
444 skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));
446 if (!(__le32_to_cpu(rxd->attention.flags) &
447 RX_ATTENTION_FLAGS_MSDU_DONE)) {
448 ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
459 int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
461 struct ath10k *ar = htt->ar;
465 struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
467 htt->rx_confused = false;
469 /* XXX: The fill level could be changed during runtime in response to
470 * the host processing latency. Is this really worth it?
472 htt->rx_ring.size = HTT_RX_RING_SIZE;
473 htt->rx_ring.size_mask = htt->rx_ring.size - 1;
474 htt->rx_ring.fill_level = HTT_RX_RING_FILL_LEVEL;
476 if (!is_power_of_2(htt->rx_ring.size)) {
477 ath10k_warn(ar, "htt rx ring size is not power of 2\n");
481 htt->rx_ring.netbufs_ring =
482 kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
484 if (!htt->rx_ring.netbufs_ring)
487 size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
489 vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
493 htt->rx_ring.paddrs_ring = vaddr;
494 htt->rx_ring.base_paddr = paddr;
496 vaddr = dma_alloc_coherent(htt->ar->dev,
497 sizeof(*htt->rx_ring.alloc_idx.vaddr),
502 htt->rx_ring.alloc_idx.vaddr = vaddr;
503 htt->rx_ring.alloc_idx.paddr = paddr;
504 htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
505 *htt->rx_ring.alloc_idx.vaddr = 0;
507 /* Initialize the Rx refill retry timer */
508 setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);
510 spin_lock_init(&htt->rx_ring.lock);
512 htt->rx_ring.fill_cnt = 0;
513 htt->rx_ring.sw_rd_idx.msdu_payld = 0;
514 hash_init(htt->rx_ring.skb_table);
516 skb_queue_head_init(&htt->rx_compl_q);
517 skb_queue_head_init(&htt->rx_in_ord_compl_q);
518 skb_queue_head_init(&htt->tx_fetch_ind_q);
519 atomic_set(&htt->num_mpdus_ready, 0);
521 ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
522 htt->rx_ring.size, htt->rx_ring.fill_level);
526 dma_free_coherent(htt->ar->dev,
528 sizeof(htt->rx_ring.paddrs_ring)),
529 htt->rx_ring.paddrs_ring,
530 htt->rx_ring.base_paddr);
532 kfree(htt->rx_ring.netbufs_ring);
537 static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
538 enum htt_rx_mpdu_encrypt_type type)
541 case HTT_RX_MPDU_ENCRYPT_NONE:
543 case HTT_RX_MPDU_ENCRYPT_WEP40:
544 case HTT_RX_MPDU_ENCRYPT_WEP104:
545 return IEEE80211_WEP_IV_LEN;
546 case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
547 case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
548 return IEEE80211_TKIP_IV_LEN;
549 case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
550 return IEEE80211_CCMP_HDR_LEN;
551 case HTT_RX_MPDU_ENCRYPT_WEP128:
552 case HTT_RX_MPDU_ENCRYPT_WAPI:
556 ath10k_warn(ar, "unsupported encryption type %d\n", type);
560 #define MICHAEL_MIC_LEN 8
562 static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
563 enum htt_rx_mpdu_encrypt_type type)
566 case HTT_RX_MPDU_ENCRYPT_NONE:
568 case HTT_RX_MPDU_ENCRYPT_WEP40:
569 case HTT_RX_MPDU_ENCRYPT_WEP104:
570 return IEEE80211_WEP_ICV_LEN;
571 case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
572 case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
573 return IEEE80211_TKIP_ICV_LEN;
574 case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
575 return IEEE80211_CCMP_MIC_LEN;
576 case HTT_RX_MPDU_ENCRYPT_WEP128:
577 case HTT_RX_MPDU_ENCRYPT_WAPI:
581 ath10k_warn(ar, "unsupported encryption type %d\n", type);
585 struct amsdu_subframe_hdr {
591 #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)
593 static void ath10k_htt_rx_h_rates(struct ath10k *ar,
594 struct ieee80211_rx_status *status,
595 struct htt_rx_desc *rxd)
597 struct ieee80211_supported_band *sband;
598 u8 cck, rate, bw, sgi, mcs, nss;
601 u32 info1, info2, info3;
603 info1 = __le32_to_cpu(rxd->ppdu_start.info1);
604 info2 = __le32_to_cpu(rxd->ppdu_start.info2);
605 info3 = __le32_to_cpu(rxd->ppdu_start.info3);
607 preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
611 /* To get legacy rate index band is required. Since band can't
612 * be undefined check if freq is non-zero.
617 cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
618 rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
619 rate &= ~RX_PPDU_START_RATE_FLAG;
621 sband = &ar->mac.sbands[status->band];
622 status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
625 case HTT_RX_HT_WITH_TXBF:
626 /* HT-SIG - Table 20-11 in info2 and info3 */
629 bw = (info2 >> 7) & 1;
630 sgi = (info3 >> 7) & 1;
632 status->rate_idx = mcs;
633 status->flag |= RX_FLAG_HT;
635 status->flag |= RX_FLAG_SHORT_GI;
637 status->flag |= RX_FLAG_40MHZ;
640 case HTT_RX_VHT_WITH_TXBF:
641 /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
645 group_id = (info2 >> 4) & 0x3F;
647 if (GROUP_ID_IS_SU_MIMO(group_id)) {
648 mcs = (info3 >> 4) & 0x0F;
649 nss = ((info2 >> 10) & 0x07) + 1;
651 /* Hardware doesn't decode VHT-SIG-B into Rx descriptor
652 * so it's impossible to decode MCS. Also since
653 * firmware consumes Group Id Management frames host
654 * has no knowledge regarding group/user position
655 * mapping so it's impossible to pick the correct Nsts
658 * Bandwidth and SGI are valid so report the rateinfo
659 * on best-effort basis.
666 ath10k_warn(ar, "invalid MCS received %u\n", mcs);
667 ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
668 __le32_to_cpu(rxd->attention.flags),
669 __le32_to_cpu(rxd->mpdu_start.info0),
670 __le32_to_cpu(rxd->mpdu_start.info1),
671 __le32_to_cpu(rxd->msdu_start.common.info0),
672 __le32_to_cpu(rxd->msdu_start.common.info1),
673 rxd->ppdu_start.info0,
674 __le32_to_cpu(rxd->ppdu_start.info1),
675 __le32_to_cpu(rxd->ppdu_start.info2),
676 __le32_to_cpu(rxd->ppdu_start.info3),
677 __le32_to_cpu(rxd->ppdu_start.info4));
679 ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
680 __le32_to_cpu(rxd->msdu_end.common.info0),
681 __le32_to_cpu(rxd->mpdu_end.info0));
683 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
684 "rx desc msdu payload: ",
685 rxd->msdu_payload, 50);
688 status->rate_idx = mcs;
689 status->vht_nss = nss;
692 status->flag |= RX_FLAG_SHORT_GI;
700 status->flag |= RX_FLAG_40MHZ;
704 status->vht_flag |= RX_VHT_FLAG_80MHZ;
707 status->flag |= RX_FLAG_VHT;
714 static struct ieee80211_channel *
715 ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
717 struct ath10k_peer *peer;
718 struct ath10k_vif *arvif;
719 struct cfg80211_chan_def def;
722 lockdep_assert_held(&ar->data_lock);
727 if (rxd->attention.flags &
728 __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
731 if (!(rxd->msdu_end.common.info0 &
732 __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
735 peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
736 RX_MPDU_START_INFO0_PEER_IDX);
738 peer = ath10k_peer_find_by_id(ar, peer_id);
742 arvif = ath10k_get_arvif(ar, peer->vdev_id);
743 if (WARN_ON_ONCE(!arvif))
746 if (ath10k_mac_vif_chan(arvif->vif, &def))
752 static struct ieee80211_channel *
753 ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
755 struct ath10k_vif *arvif;
756 struct cfg80211_chan_def def;
758 lockdep_assert_held(&ar->data_lock);
760 list_for_each_entry(arvif, &ar->arvifs, list) {
761 if (arvif->vdev_id == vdev_id &&
762 ath10k_mac_vif_chan(arvif->vif, &def) == 0)
770 ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
771 struct ieee80211_chanctx_conf *conf,
774 struct cfg80211_chan_def *def = data;
779 static struct ieee80211_channel *
780 ath10k_htt_rx_h_any_channel(struct ath10k *ar)
782 struct cfg80211_chan_def def = {};
784 ieee80211_iter_chan_contexts_atomic(ar->hw,
785 ath10k_htt_rx_h_any_chan_iter,
791 static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
792 struct ieee80211_rx_status *status,
793 struct htt_rx_desc *rxd,
796 struct ieee80211_channel *ch;
798 spin_lock_bh(&ar->data_lock);
799 ch = ar->scan_channel;
803 ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
805 ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
807 ch = ath10k_htt_rx_h_any_channel(ar);
809 ch = ar->tgt_oper_chan;
810 spin_unlock_bh(&ar->data_lock);
815 status->band = ch->band;
816 status->freq = ch->center_freq;
821 static void ath10k_htt_rx_h_signal(struct ath10k *ar,
822 struct ieee80211_rx_status *status,
823 struct htt_rx_desc *rxd)
825 /* FIXME: Get real NF */
826 status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
827 rxd->ppdu_start.rssi_comb;
828 status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
831 static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
832 struct ieee80211_rx_status *status,
833 struct htt_rx_desc *rxd)
835 /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
836 * means all prior MSDUs in a PPDU are reported to mac80211 without the
837 * TSF. Is it worth holding frames until end of PPDU is known?
839 * FIXME: Can we get/compute 64bit TSF?
841 status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
842 status->flag |= RX_FLAG_MACTIME_END;
845 static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
846 struct sk_buff_head *amsdu,
847 struct ieee80211_rx_status *status,
850 struct sk_buff *first;
851 struct htt_rx_desc *rxd;
855 if (skb_queue_empty(amsdu))
858 first = skb_peek(amsdu);
859 rxd = (void *)first->data - sizeof(*rxd);
861 is_first_ppdu = !!(rxd->attention.flags &
862 __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
863 is_last_ppdu = !!(rxd->attention.flags &
864 __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
867 /* New PPDU starts so clear out the old per-PPDU status. */
869 status->rate_idx = 0;
871 status->vht_flag &= ~RX_VHT_FLAG_80MHZ;
872 status->flag &= ~(RX_FLAG_HT |
876 RX_FLAG_MACTIME_END);
877 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
879 ath10k_htt_rx_h_signal(ar, status, rxd);
880 ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
881 ath10k_htt_rx_h_rates(ar, status, rxd);
885 ath10k_htt_rx_h_mactime(ar, status, rxd);
888 static const char * const tid_to_ac[] = {
899 static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
904 if (!ieee80211_is_data_qos(hdr->frame_control))
907 qc = ieee80211_get_qos_ctl(hdr);
908 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
910 snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
912 snprintf(out, size, "tid %d", tid);
917 static void ath10k_process_rx(struct ath10k *ar,
918 struct ieee80211_rx_status *rx_status,
921 struct ieee80211_rx_status *status;
922 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
925 status = IEEE80211_SKB_RXCB(skb);
926 *status = *rx_status;
928 ath10k_dbg(ar, ATH10K_DBG_DATA,
929 "rx skb %pK len %u peer %pM %s %s sn %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%llx fcs-err %i mic-err %i amsdu-more %i\n",
932 ieee80211_get_SA(hdr),
933 ath10k_get_tid(hdr, tid, sizeof(tid)),
934 is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
936 (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
937 (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) == 0 ?
939 status->flag & RX_FLAG_HT ? "ht" : "",
940 status->flag & RX_FLAG_VHT ? "vht" : "",
941 status->flag & RX_FLAG_40MHZ ? "40" : "",
942 status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
943 status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
947 status->band, status->flag,
948 !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
949 !!(status->flag & RX_FLAG_MMIC_ERROR),
950 !!(status->flag & RX_FLAG_AMSDU_MORE));
951 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
952 skb->data, skb->len);
953 trace_ath10k_rx_hdr(ar, skb->data, skb->len);
954 trace_ath10k_rx_payload(ar, skb->data, skb->len);
956 ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
959 static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
960 struct ieee80211_hdr *hdr)
962 int len = ieee80211_hdrlen(hdr->frame_control);
964 if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
965 ar->running_fw->fw_file.fw_features))
966 len = round_up(len, 4);
971 static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
972 struct sk_buff *msdu,
973 struct ieee80211_rx_status *status,
974 enum htt_rx_mpdu_encrypt_type enctype,
977 struct ieee80211_hdr *hdr;
978 struct htt_rx_desc *rxd;
984 rxd = (void *)msdu->data - sizeof(*rxd);
985 is_first = !!(rxd->msdu_end.common.info0 &
986 __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
987 is_last = !!(rxd->msdu_end.common.info0 &
988 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
990 /* Delivered decapped frame:
992 * [crypto param] <-- can be trimmed if !fcs_err &&
993 * !decrypt_err && !peer_idx_invalid
994 * [amsdu header] <-- only if A-MSDU
997 * [FCS] <-- at end, needs to be trimmed
1000 /* This probably shouldn't happen but warn just in case */
1001 if (unlikely(WARN_ON_ONCE(!is_first)))
1004 /* This probably shouldn't happen but warn just in case */
1005 if (unlikely(WARN_ON_ONCE(!(is_first && is_last))))
1008 skb_trim(msdu, msdu->len - FCS_LEN);
1010 /* In most cases this will be true for sniffed frames. It makes sense
1011 * to deliver them as-is without stripping the crypto param. This is
1012 * necessary for software based decryption.
1014 * If there's no error then the frame is decrypted. At least that is
1015 * the case for frames that come in via fragmented rx indication.
1020 /* The payload is decrypted so strip crypto params. Start from tail
1021 * since hdr is used to compute some stuff.
1024 hdr = (void *)msdu->data;
1027 if (status->flag & RX_FLAG_IV_STRIPPED)
1028 skb_trim(msdu, msdu->len -
1029 ath10k_htt_rx_crypto_tail_len(ar, enctype));
1032 if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
1033 !ieee80211_has_morefrags(hdr->frame_control) &&
1034 enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
1035 skb_trim(msdu, msdu->len - 8);
1038 if (status->flag & RX_FLAG_IV_STRIPPED) {
1039 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1040 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1042 memmove((void *)msdu->data + crypto_len,
1043 (void *)msdu->data, hdr_len);
1044 skb_pull(msdu, crypto_len);
1048 static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
1049 struct sk_buff *msdu,
1050 struct ieee80211_rx_status *status,
1051 const u8 first_hdr[64])
1053 struct ieee80211_hdr *hdr;
1054 struct htt_rx_desc *rxd;
1060 /* Delivered decapped frame:
1061 * [nwifi 802.11 header] <-- replaced with 802.11 hdr
1064 * Note: The nwifi header doesn't have QoS Control and is
1065 * (always?) a 3addr frame.
1067 * Note2: There's no A-MSDU subframe header. Even if it's part
1071 /* pull decapped header and copy SA & DA */
1072 rxd = (void *)msdu->data - sizeof(*rxd);
1074 l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1075 skb_put(msdu, l3_pad_bytes);
1077 hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes);
1079 hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
1080 ether_addr_copy(da, ieee80211_get_DA(hdr));
1081 ether_addr_copy(sa, ieee80211_get_SA(hdr));
1082 skb_pull(msdu, hdr_len);
1084 /* push original 802.11 header */
1085 hdr = (struct ieee80211_hdr *)first_hdr;
1086 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1087 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1089 /* original 802.11 header has a different DA and in
1090 * case of 4addr it may also have different SA
1092 hdr = (struct ieee80211_hdr *)msdu->data;
1093 ether_addr_copy(ieee80211_get_DA(hdr), da);
1094 ether_addr_copy(ieee80211_get_SA(hdr), sa);
1097 static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
1098 struct sk_buff *msdu,
1099 enum htt_rx_mpdu_encrypt_type enctype)
1101 struct ieee80211_hdr *hdr;
1102 struct htt_rx_desc *rxd;
1103 size_t hdr_len, crypto_len;
1105 bool is_first, is_last, is_amsdu;
1106 int bytes_aligned = ar->hw_params.decap_align_bytes;
1108 rxd = (void *)msdu->data - sizeof(*rxd);
1109 hdr = (void *)rxd->rx_hdr_status;
1111 is_first = !!(rxd->msdu_end.common.info0 &
1112 __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1113 is_last = !!(rxd->msdu_end.common.info0 &
1114 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
1115 is_amsdu = !(is_first && is_last);
1120 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1121 crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1123 rfc1042 += round_up(hdr_len, bytes_aligned) +
1124 round_up(crypto_len, bytes_aligned);
1128 rfc1042 += sizeof(struct amsdu_subframe_hdr);
1133 static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
1134 struct sk_buff *msdu,
1135 struct ieee80211_rx_status *status,
1136 const u8 first_hdr[64],
1137 enum htt_rx_mpdu_encrypt_type enctype)
1139 struct ieee80211_hdr *hdr;
1146 struct htt_rx_desc *rxd;
1148 /* Delivered decapped frame:
1149 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
1153 rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
1154 if (WARN_ON_ONCE(!rfc1042))
1157 rxd = (void *)msdu->data - sizeof(*rxd);
1158 l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1159 skb_put(msdu, l3_pad_bytes);
1160 skb_pull(msdu, l3_pad_bytes);
1162 /* pull decapped header and copy SA & DA */
1163 eth = (struct ethhdr *)msdu->data;
1164 ether_addr_copy(da, eth->h_dest);
1165 ether_addr_copy(sa, eth->h_source);
1166 skb_pull(msdu, sizeof(struct ethhdr));
1168 /* push rfc1042/llc/snap */
1169 memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
1170 sizeof(struct rfc1042_hdr));
1172 /* push original 802.11 header */
1173 hdr = (struct ieee80211_hdr *)first_hdr;
1174 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1175 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1177 /* original 802.11 header has a different DA and in
1178 * case of 4addr it may also have different SA
1180 hdr = (struct ieee80211_hdr *)msdu->data;
1181 ether_addr_copy(ieee80211_get_DA(hdr), da);
1182 ether_addr_copy(ieee80211_get_SA(hdr), sa);
1185 static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
1186 struct sk_buff *msdu,
1187 struct ieee80211_rx_status *status,
1188 const u8 first_hdr[64])
1190 struct ieee80211_hdr *hdr;
1193 struct htt_rx_desc *rxd;
1195 /* Delivered decapped frame:
1196 * [amsdu header] <-- replaced with 802.11 hdr
1201 rxd = (void *)msdu->data - sizeof(*rxd);
1202 l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd);
1204 skb_put(msdu, l3_pad_bytes);
1205 skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes);
1207 hdr = (struct ieee80211_hdr *)first_hdr;
1208 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1209 memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1212 static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
1213 struct sk_buff *msdu,
1214 struct ieee80211_rx_status *status,
1216 enum htt_rx_mpdu_encrypt_type enctype,
1219 struct htt_rx_desc *rxd;
1220 enum rx_msdu_decap_format decap;
1222 /* First msdu's decapped header:
1223 * [802.11 header] <-- padded to 4 bytes long
1224 * [crypto param] <-- padded to 4 bytes long
1225 * [amsdu header] <-- only if A-MSDU
1228 * Other (2nd, 3rd, ..) msdu's decapped header:
1229 * [amsdu header] <-- only if A-MSDU
1233 rxd = (void *)msdu->data - sizeof(*rxd);
1234 decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1235 RX_MSDU_START_INFO1_DECAP_FORMAT);
1238 case RX_MSDU_DECAP_RAW:
1239 ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
1242 case RX_MSDU_DECAP_NATIVE_WIFI:
1243 ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr);
1245 case RX_MSDU_DECAP_ETHERNET2_DIX:
1246 ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1248 case RX_MSDU_DECAP_8023_SNAP_LLC:
1249 ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr);
1254 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
1256 struct htt_rx_desc *rxd;
1258 bool is_ip4, is_ip6;
1259 bool is_tcp, is_udp;
1260 bool ip_csum_ok, tcpudp_csum_ok;
1262 rxd = (void *)skb->data - sizeof(*rxd);
1263 flags = __le32_to_cpu(rxd->attention.flags);
1264 info = __le32_to_cpu(rxd->msdu_start.common.info1);
1266 is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
1267 is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
1268 is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
1269 is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
1270 ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
1271 tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);
1273 if (!is_ip4 && !is_ip6)
1274 return CHECKSUM_NONE;
1275 if (!is_tcp && !is_udp)
1276 return CHECKSUM_NONE;
1278 return CHECKSUM_NONE;
1279 if (!tcpudp_csum_ok)
1280 return CHECKSUM_NONE;
1282 return CHECKSUM_UNNECESSARY;
1285 static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
1287 msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
1290 static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
1291 struct sk_buff_head *amsdu,
1292 struct ieee80211_rx_status *status)
1294 struct sk_buff *first;
1295 struct sk_buff *last;
1296 struct sk_buff *msdu;
1297 struct htt_rx_desc *rxd;
1298 struct ieee80211_hdr *hdr;
1299 enum htt_rx_mpdu_encrypt_type enctype;
1304 bool has_crypto_err;
1306 bool has_peer_idx_invalid;
1311 if (skb_queue_empty(amsdu))
1314 first = skb_peek(amsdu);
1315 rxd = (void *)first->data - sizeof(*rxd);
1317 is_mgmt = !!(rxd->attention.flags &
1318 __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
1320 enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
1321 RX_MPDU_START_INFO0_ENCRYPT_TYPE);
1323 /* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
1324 * decapped header. It'll be used for undecapping of each MSDU.
1326 hdr = (void *)rxd->rx_hdr_status;
1327 hdr_len = ieee80211_hdrlen(hdr->frame_control);
1328 memcpy(first_hdr, hdr, hdr_len);
1330 /* Each A-MSDU subframe will use the original header as the base and be
1331 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
1333 hdr = (void *)first_hdr;
1334 qos = ieee80211_get_qos_ctl(hdr);
1335 qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1337 /* Some attention flags are valid only in the last MSDU. */
1338 last = skb_peek_tail(amsdu);
1339 rxd = (void *)last->data - sizeof(*rxd);
1340 attention = __le32_to_cpu(rxd->attention.flags);
1342 has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
1343 has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
1344 has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
1345 has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);
1347 /* Note: If hardware captures an encrypted frame that it can't decrypt,
1348 * e.g. due to fcs error, missing peer or invalid key data it will
1349 * report the frame as raw.
1351 is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
1354 !has_peer_idx_invalid);
1356 /* Clear per-MPDU flags while leaving per-PPDU flags intact. */
1357 status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
1358 RX_FLAG_MMIC_ERROR |
1360 RX_FLAG_IV_STRIPPED |
1361 RX_FLAG_ONLY_MONITOR |
1362 RX_FLAG_MMIC_STRIPPED);
1365 status->flag |= RX_FLAG_FAILED_FCS_CRC;
1368 status->flag |= RX_FLAG_MMIC_ERROR;
1370 /* Firmware reports all necessary management frames via WMI already.
1371 * They are not reported to monitor interfaces at all so pass the ones
1372 * coming via HTT to monitor interfaces instead. This simplifies
1376 status->flag |= RX_FLAG_ONLY_MONITOR;
1379 status->flag |= RX_FLAG_DECRYPTED;
1381 if (likely(!is_mgmt))
1382 status->flag |= RX_FLAG_IV_STRIPPED |
1383 RX_FLAG_MMIC_STRIPPED;
1386 skb_queue_walk(amsdu, msdu) {
1387 ath10k_htt_rx_h_csum_offload(msdu);
1388 ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
1391 /* Undecapping involves copying the original 802.11 header back
1392 * to sk_buff. If frame is protected and hardware has decrypted
1393 * it then remove the protected bit.
1400 hdr = (void *)msdu->data;
1401 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1405 static void ath10k_htt_rx_h_deliver(struct ath10k *ar,
1406 struct sk_buff_head *amsdu,
1407 struct ieee80211_rx_status *status)
1409 struct sk_buff *msdu;
1411 while ((msdu = __skb_dequeue(amsdu))) {
1412 /* Setup per-MSDU flags */
1413 if (skb_queue_empty(amsdu))
1414 status->flag &= ~RX_FLAG_AMSDU_MORE;
1416 status->flag |= RX_FLAG_AMSDU_MORE;
1418 ath10k_process_rx(ar, status, msdu);
1422 static int ath10k_unchain_msdu(struct sk_buff_head *amsdu)
1424 struct sk_buff *skb, *first;
1428 /* TODO: Might could optimize this by using
1429 * skb_try_coalesce or similar method to
1430 * decrease copying, or maybe get mac80211 to
1431 * provide a way to just receive a list of
1435 first = __skb_dequeue(amsdu);
1437 /* Allocate total length all at once. */
1438 skb_queue_walk(amsdu, skb)
1439 total_len += skb->len;
1441 space = total_len - skb_tailroom(first);
1443 (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
1444 /* TODO: bump some rx-oom error stat */
1445 /* put it back together so we can free the
1446 * whole list at once.
1448 __skb_queue_head(amsdu, first);
1452 /* Walk list again, copying contents into
1455 while ((skb = __skb_dequeue(amsdu))) {
1456 skb_copy_from_linear_data(skb, skb_put(first, skb->len),
1458 dev_kfree_skb_any(skb);
1461 __skb_queue_head(amsdu, first);
1465 static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
1466 struct sk_buff_head *amsdu,
1469 struct sk_buff *first;
1470 struct htt_rx_desc *rxd;
1471 enum rx_msdu_decap_format decap;
1473 first = skb_peek(amsdu);
1474 rxd = (void *)first->data - sizeof(*rxd);
1475 decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
1476 RX_MSDU_START_INFO1_DECAP_FORMAT);
1481 /* FIXME: Current unchaining logic can only handle simple case of raw
1482 * msdu chaining. If decapping is other than raw the chaining may be
1483 * more complex and this isn't handled by the current code. Don't even
1484 * try re-constructing such frames - it'll be pretty much garbage.
1486 if (decap != RX_MSDU_DECAP_RAW ||
1487 skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
1488 __skb_queue_purge(amsdu);
1492 ath10k_unchain_msdu(amsdu);
1495 static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
1496 struct sk_buff_head *amsdu,
1497 struct ieee80211_rx_status *rx_status)
1499 /* FIXME: It might be a good idea to do some fuzzy-testing to drop
1500 * invalid/dangerous frames.
1503 if (!rx_status->freq) {
1504 ath10k_warn(ar, "no channel configured; ignoring frame(s)!\n");
1508 if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
1509 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1516 static void ath10k_htt_rx_h_filter(struct ath10k *ar,
1517 struct sk_buff_head *amsdu,
1518 struct ieee80211_rx_status *rx_status)
1520 if (skb_queue_empty(amsdu))
1523 if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
1526 __skb_queue_purge(amsdu);
1529 static int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt)
1531 struct ath10k *ar = htt->ar;
1532 struct ieee80211_rx_status *rx_status = &htt->rx_status;
1533 struct sk_buff_head amsdu;
1536 __skb_queue_head_init(&amsdu);
1538 spin_lock_bh(&htt->rx_ring.lock);
1539 if (htt->rx_confused) {
1540 spin_unlock_bh(&htt->rx_ring.lock);
1543 ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu);
1544 spin_unlock_bh(&htt->rx_ring.lock);
1547 ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
1548 __skb_queue_purge(&amsdu);
1549 /* FIXME: It's probably a good idea to reboot the
1550 * device instead of leaving it inoperable.
1552 htt->rx_confused = true;
1556 num_msdus = skb_queue_len(&amsdu);
1557 ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
1558 ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0);
1559 ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
1560 ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status);
1561 ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status);
1566 static void ath10k_htt_rx_proc_rx_ind(struct ath10k_htt *htt,
1567 struct htt_rx_indication *rx)
1569 struct ath10k *ar = htt->ar;
1570 struct htt_rx_indication_mpdu_range *mpdu_ranges;
1571 int num_mpdu_ranges;
1572 int i, mpdu_count = 0;
1574 num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
1575 HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
1576 mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
1578 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1580 (sizeof(struct htt_rx_indication_mpdu_range) *
1583 for (i = 0; i < num_mpdu_ranges; i++)
1584 mpdu_count += mpdu_ranges[i].mpdu_count;
1586 atomic_add(mpdu_count, &htt->num_mpdus_ready);
1589 static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar,
1590 struct sk_buff *skb)
1592 struct ath10k_htt *htt = &ar->htt;
1593 struct htt_resp *resp = (struct htt_resp *)skb->data;
1594 struct htt_tx_done tx_done = {};
1595 int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
1600 case HTT_DATA_TX_STATUS_NO_ACK:
1601 tx_done.status = HTT_TX_COMPL_STATE_NOACK;
1603 case HTT_DATA_TX_STATUS_OK:
1604 tx_done.status = HTT_TX_COMPL_STATE_ACK;
1606 case HTT_DATA_TX_STATUS_DISCARD:
1607 case HTT_DATA_TX_STATUS_POSTPONE:
1608 case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
1609 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
1612 ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1613 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
1617 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1618 resp->data_tx_completion.num_msdus);
1620 for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
1621 msdu_id = resp->data_tx_completion.msdus[i];
1622 tx_done.msdu_id = __le16_to_cpu(msdu_id);
1624 /* kfifo_put: In practice firmware shouldn't fire off per-CE
1625 * interrupt and main interrupt (MSI/-X range case) for the same
1626 * HTC service so it should be safe to use kfifo_put w/o lock.
1628 * From kfifo_put() documentation:
1629 * Note that with only one concurrent reader and one concurrent
1630 * writer, you don't need extra locking to use these macro.
1632 if (!kfifo_put(&htt->txdone_fifo, tx_done)) {
1633 ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n",
1634 tx_done.msdu_id, tx_done.status);
1635 ath10k_txrx_tx_unref(htt, &tx_done);
1640 static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
1642 struct htt_rx_addba *ev = &resp->rx_addba;
1643 struct ath10k_peer *peer;
1644 struct ath10k_vif *arvif;
1645 u16 info0, tid, peer_id;
1647 info0 = __le16_to_cpu(ev->info0);
1648 tid = MS(info0, HTT_RX_BA_INFO0_TID);
1649 peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1651 ath10k_dbg(ar, ATH10K_DBG_HTT,
1652 "htt rx addba tid %hu peer_id %hu size %hhu\n",
1653 tid, peer_id, ev->window_size);
1655 spin_lock_bh(&ar->data_lock);
1656 peer = ath10k_peer_find_by_id(ar, peer_id);
1658 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1660 spin_unlock_bh(&ar->data_lock);
1664 arvif = ath10k_get_arvif(ar, peer->vdev_id);
1666 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1668 spin_unlock_bh(&ar->data_lock);
1672 ath10k_dbg(ar, ATH10K_DBG_HTT,
1673 "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
1674 peer->addr, tid, ev->window_size);
1676 ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1677 spin_unlock_bh(&ar->data_lock);
1680 static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
1682 struct htt_rx_delba *ev = &resp->rx_delba;
1683 struct ath10k_peer *peer;
1684 struct ath10k_vif *arvif;
1685 u16 info0, tid, peer_id;
1687 info0 = __le16_to_cpu(ev->info0);
1688 tid = MS(info0, HTT_RX_BA_INFO0_TID);
1689 peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);
1691 ath10k_dbg(ar, ATH10K_DBG_HTT,
1692 "htt rx delba tid %hu peer_id %hu\n",
1695 spin_lock_bh(&ar->data_lock);
1696 peer = ath10k_peer_find_by_id(ar, peer_id);
1698 ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1700 spin_unlock_bh(&ar->data_lock);
1704 arvif = ath10k_get_arvif(ar, peer->vdev_id);
1706 ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1708 spin_unlock_bh(&ar->data_lock);
1712 ath10k_dbg(ar, ATH10K_DBG_HTT,
1713 "htt rx stop rx ba session sta %pM tid %hu\n",
1716 ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
1717 spin_unlock_bh(&ar->data_lock);
1720 static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
1721 struct sk_buff_head *amsdu)
1723 struct sk_buff *msdu;
1724 struct htt_rx_desc *rxd;
1726 if (skb_queue_empty(list))
1729 if (WARN_ON(!skb_queue_empty(amsdu)))
1732 while ((msdu = __skb_dequeue(list))) {
1733 __skb_queue_tail(amsdu, msdu);
1735 rxd = (void *)msdu->data - sizeof(*rxd);
1736 if (rxd->msdu_end.common.info0 &
1737 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
1741 msdu = skb_peek_tail(amsdu);
1742 rxd = (void *)msdu->data - sizeof(*rxd);
1743 if (!(rxd->msdu_end.common.info0 &
1744 __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
1745 skb_queue_splice_init(amsdu, list);
1752 static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
1753 struct sk_buff *skb)
1755 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1757 if (!ieee80211_has_protected(hdr->frame_control))
1760 /* Offloaded frames are already decrypted but firmware insists they are
1761 * protected in the 802.11 header. Strip the flag. Otherwise mac80211
1762 * will drop the frame.
1765 hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1766 status->flag |= RX_FLAG_DECRYPTED |
1767 RX_FLAG_IV_STRIPPED |
1768 RX_FLAG_MMIC_STRIPPED;
1771 static int ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
1772 struct sk_buff_head *list)
1774 struct ath10k_htt *htt = &ar->htt;
1775 struct ieee80211_rx_status *status = &htt->rx_status;
1776 struct htt_rx_offload_msdu *rx;
1777 struct sk_buff *msdu;
1781 while ((msdu = __skb_dequeue(list))) {
1782 /* Offloaded frames don't have Rx descriptor. Instead they have
1783 * a short meta information header.
1786 rx = (void *)msdu->data;
1788 skb_put(msdu, sizeof(*rx));
1789 skb_pull(msdu, sizeof(*rx));
1791 if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
1792 ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
1793 dev_kfree_skb_any(msdu);
1797 skb_put(msdu, __le16_to_cpu(rx->msdu_len));
1799 /* Offloaded rx header length isn't multiple of 2 nor 4 so the
1800 * actual payload is unaligned. Align the frame. Otherwise
1801 * mac80211 complains. This shouldn't reduce performance much
1802 * because these offloaded frames are rare.
1804 offset = 4 - ((unsigned long)msdu->data & 3);
1805 skb_put(msdu, offset);
1806 memmove(msdu->data + offset, msdu->data, msdu->len);
1807 skb_pull(msdu, offset);
1809 /* FIXME: The frame is NWifi. Re-construct QoS Control
1810 * if possible later.
1813 memset(status, 0, sizeof(*status));
1814 status->flag |= RX_FLAG_NO_SIGNAL_VAL;
1816 ath10k_htt_rx_h_rx_offload_prot(status, msdu);
1817 ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
1818 ath10k_process_rx(ar, status, msdu);
1824 static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
1826 struct ath10k_htt *htt = &ar->htt;
1827 struct htt_resp *resp = (void *)skb->data;
1828 struct ieee80211_rx_status *status = &htt->rx_status;
1829 struct sk_buff_head list;
1830 struct sk_buff_head amsdu;
1837 int ret, num_msdus = 0;
1839 lockdep_assert_held(&htt->rx_ring.lock);
1841 if (htt->rx_confused)
1844 skb_pull(skb, sizeof(resp->hdr));
1845 skb_pull(skb, sizeof(resp->rx_in_ord_ind));
1847 peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
1848 msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
1849 vdev_id = resp->rx_in_ord_ind.vdev_id;
1850 tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
1851 offload = !!(resp->rx_in_ord_ind.info &
1852 HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
1853 frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);
1855 ath10k_dbg(ar, ATH10K_DBG_HTT,
1856 "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
1857 vdev_id, peer_id, tid, offload, frag, msdu_count);
1859 if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs)) {
1860 ath10k_warn(ar, "dropping invalid in order rx indication\n");
1864 /* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
1865 * extracted and processed.
1867 __skb_queue_head_init(&list);
1868 ret = ath10k_htt_rx_pop_paddr_list(htt, &resp->rx_in_ord_ind, &list);
1870 ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
1871 htt->rx_confused = true;
1875 /* Offloaded frames are very different and need to be handled
1879 num_msdus = ath10k_htt_rx_h_rx_offload(ar, &list);
1881 while (!skb_queue_empty(&list)) {
1882 __skb_queue_head_init(&amsdu);
1883 ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
1886 /* Note: The in-order indication may report interleaved
1887 * frames from different PPDUs meaning reported rx rate
1888 * to mac80211 isn't accurate/reliable. It's still
1889 * better to report something than nothing though. This
1890 * should still give an idea about rx rate to the user.
1892 num_msdus += skb_queue_len(&amsdu);
1893 ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
1894 ath10k_htt_rx_h_filter(ar, &amsdu, status);
1895 ath10k_htt_rx_h_mpdu(ar, &amsdu, status);
1896 ath10k_htt_rx_h_deliver(ar, &amsdu, status);
1901 /* Should not happen. */
1902 ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
1903 htt->rx_confused = true;
1904 __skb_queue_purge(&list);
1911 static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
1912 const __le32 *resp_ids,
1918 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
1921 for (i = 0; i < num_resp_ids; i++) {
1922 resp_id = le32_to_cpu(resp_ids[i]);
1924 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
1927 /* TODO: free resp_id */
1931 static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
1933 struct ieee80211_hw *hw = ar->hw;
1934 struct ieee80211_txq *txq;
1935 struct htt_resp *resp = (struct htt_resp *)skb->data;
1936 struct htt_tx_fetch_record *record;
1938 size_t max_num_bytes;
1939 size_t max_num_msdus;
1942 const __le32 *resp_ids;
1950 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");
1952 len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
1953 if (unlikely(skb->len < len)) {
1954 ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
1958 num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
1959 num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);
1961 len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
1962 len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;
1964 if (unlikely(skb->len < len)) {
1965 ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
1969 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %hu num resps %hu seq %hu\n",
1970 num_records, num_resp_ids,
1971 le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));
1973 if (!ar->htt.tx_q_state.enabled) {
1974 ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n");
1978 if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) {
1979 ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n");
1985 for (i = 0; i < num_records; i++) {
1986 record = &resp->tx_fetch_ind.records[i];
1987 peer_id = MS(le16_to_cpu(record->info),
1988 HTT_TX_FETCH_RECORD_INFO_PEER_ID);
1989 tid = MS(le16_to_cpu(record->info),
1990 HTT_TX_FETCH_RECORD_INFO_TID);
1991 max_num_msdus = le16_to_cpu(record->num_msdus);
1992 max_num_bytes = le32_to_cpu(record->num_bytes);
1994 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %hu tid %hhu msdus %zu bytes %zu\n",
1995 i, peer_id, tid, max_num_msdus, max_num_bytes);
1997 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
1998 unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
1999 ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
2004 spin_lock_bh(&ar->data_lock);
2005 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
2006 spin_unlock_bh(&ar->data_lock);
2008 /* It is okay to release the lock and use txq because RCU read
2012 if (unlikely(!txq)) {
2013 ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
2021 while (num_msdus < max_num_msdus &&
2022 num_bytes < max_num_bytes) {
2023 ret = ath10k_mac_tx_push_txq(hw, txq);
2031 record->num_msdus = cpu_to_le16(num_msdus);
2032 record->num_bytes = cpu_to_le32(num_bytes);
2034 ath10k_htt_tx_txq_recalc(hw, txq);
2039 resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
2040 ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);
2042 ret = ath10k_htt_tx_fetch_resp(ar,
2043 resp->tx_fetch_ind.token,
2044 resp->tx_fetch_ind.fetch_seq_num,
2045 resp->tx_fetch_ind.records,
2047 if (unlikely(ret)) {
2048 ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n",
2049 le32_to_cpu(resp->tx_fetch_ind.token), ret);
2050 /* FIXME: request fw restart */
2053 ath10k_htt_tx_txq_sync(ar);
2056 static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
2057 struct sk_buff *skb)
2059 const struct htt_resp *resp = (void *)skb->data;
2063 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");
2065 len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
2066 if (unlikely(skb->len < len)) {
2067 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
2071 num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
2072 len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;
2074 if (unlikely(skb->len < len)) {
2075 ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
2079 ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
2080 resp->tx_fetch_confirm.resp_ids,
2084 static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
2085 struct sk_buff *skb)
2087 const struct htt_resp *resp = (void *)skb->data;
2088 const struct htt_tx_mode_switch_record *record;
2089 struct ieee80211_txq *txq;
2090 struct ath10k_txq *artxq;
2093 enum htt_tx_mode_switch_mode mode;
2102 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");
2104 len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
2105 if (unlikely(skb->len < len)) {
2106 ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
2110 info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
2111 info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);
2113 enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
2114 num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
2115 mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
2116 threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
2118 ath10k_dbg(ar, ATH10K_DBG_HTT,
2119 "htt rx tx mode switch ind info0 0x%04hx info1 0x%04hx enable %d num records %zd mode %d threshold %hu\n",
2120 info0, info1, enable, num_records, mode, threshold);
2122 len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;
2124 if (unlikely(skb->len < len)) {
2125 ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
2130 case HTT_TX_MODE_SWITCH_PUSH:
2131 case HTT_TX_MODE_SWITCH_PUSH_PULL:
2134 ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
2142 ar->htt.tx_q_state.enabled = enable;
2143 ar->htt.tx_q_state.mode = mode;
2144 ar->htt.tx_q_state.num_push_allowed = threshold;
2148 for (i = 0; i < num_records; i++) {
2149 record = &resp->tx_mode_switch_ind.records[i];
2150 info0 = le16_to_cpu(record->info0);
2151 peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
2152 tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);
2154 if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
2155 unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
2156 ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
2161 spin_lock_bh(&ar->data_lock);
2162 txq = ath10k_mac_txq_lookup(ar, peer_id, tid);
2163 spin_unlock_bh(&ar->data_lock);
2165 /* It is okay to release the lock and use txq because RCU read
2169 if (unlikely(!txq)) {
2170 ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n",
2175 spin_lock_bh(&ar->htt.tx_lock);
2176 artxq = (void *)txq->drv_priv;
2177 artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus);
2178 spin_unlock_bh(&ar->htt.tx_lock);
2183 ath10k_mac_tx_push_pending(ar);
2186 void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
2190 release = ath10k_htt_t2h_msg_handler(ar, skb);
2192 /* Free the indication buffer */
2194 dev_kfree_skb_any(skb);
2197 bool ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
2199 struct ath10k_htt *htt = &ar->htt;
2200 struct htt_resp *resp = (struct htt_resp *)skb->data;
2201 enum htt_t2h_msg_type type;
2203 /* confirm alignment */
2204 if (!IS_ALIGNED((unsigned long)skb->data, 4))
2205 ath10k_warn(ar, "unaligned htt message, expect trouble\n");
2207 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
2208 resp->hdr.msg_type);
2210 if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
2211 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
2212 resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
2215 type = ar->htt.t2h_msg_types[resp->hdr.msg_type];
2218 case HTT_T2H_MSG_TYPE_VERSION_CONF: {
2219 htt->target_version_major = resp->ver_resp.major;
2220 htt->target_version_minor = resp->ver_resp.minor;
2221 complete(&htt->target_version_received);
2224 case HTT_T2H_MSG_TYPE_RX_IND:
2225 ath10k_htt_rx_proc_rx_ind(htt, &resp->rx_ind);
2227 case HTT_T2H_MSG_TYPE_PEER_MAP: {
2228 struct htt_peer_map_event ev = {
2229 .vdev_id = resp->peer_map.vdev_id,
2230 .peer_id = __le16_to_cpu(resp->peer_map.peer_id),
2232 memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
2233 ath10k_peer_map_event(htt, &ev);
2236 case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
2237 struct htt_peer_unmap_event ev = {
2238 .peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
2240 ath10k_peer_unmap_event(htt, &ev);
2243 case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
2244 struct htt_tx_done tx_done = {};
2245 int status = __le32_to_cpu(resp->mgmt_tx_completion.status);
2247 tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id);
2250 case HTT_MGMT_TX_STATUS_OK:
2251 tx_done.status = HTT_TX_COMPL_STATE_ACK;
2253 case HTT_MGMT_TX_STATUS_RETRY:
2254 tx_done.status = HTT_TX_COMPL_STATE_NOACK;
2256 case HTT_MGMT_TX_STATUS_DROP:
2257 tx_done.status = HTT_TX_COMPL_STATE_DISCARD;
2261 status = ath10k_txrx_tx_unref(htt, &tx_done);
2263 spin_lock_bh(&htt->tx_lock);
2264 ath10k_htt_tx_mgmt_dec_pending(htt);
2265 spin_unlock_bh(&htt->tx_lock);
2269 case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
2270 ath10k_htt_rx_tx_compl_ind(htt->ar, skb);
2272 case HTT_T2H_MSG_TYPE_SEC_IND: {
2273 struct ath10k *ar = htt->ar;
2274 struct htt_security_indication *ev = &resp->security_indication;
2276 ath10k_dbg(ar, ATH10K_DBG_HTT,
2277 "sec ind peer_id %d unicast %d type %d\n",
2278 __le16_to_cpu(ev->peer_id),
2279 !!(ev->flags & HTT_SECURITY_IS_UNICAST),
2280 MS(ev->flags, HTT_SECURITY_TYPE));
2281 complete(&ar->install_key_done);
2284 case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
2285 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2286 skb->data, skb->len);
2287 atomic_inc(&htt->num_mpdus_ready);
2290 case HTT_T2H_MSG_TYPE_TEST:
2292 case HTT_T2H_MSG_TYPE_STATS_CONF:
2293 trace_ath10k_htt_stats(ar, skb->data, skb->len);
2295 case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
2296 /* Firmware can return tx frames if it's unable to fully
2297 * process them and suspects host may be able to fix it. ath10k
2298 * sends all tx frames as already inspected so this shouldn't
2299 * happen unless fw has a bug.
2301 ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
2303 case HTT_T2H_MSG_TYPE_RX_ADDBA:
2304 ath10k_htt_rx_addba(ar, resp);
2306 case HTT_T2H_MSG_TYPE_RX_DELBA:
2307 ath10k_htt_rx_delba(ar, resp);
2309 case HTT_T2H_MSG_TYPE_PKTLOG: {
2310 trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
2312 offsetof(struct htt_resp,
2313 pktlog_msg.payload));
2316 case HTT_T2H_MSG_TYPE_RX_FLUSH: {
2317 /* Ignore this event because mac80211 takes care of Rx
2318 * aggregation reordering.
2322 case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
2323 __skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
2326 case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
2328 case HTT_T2H_MSG_TYPE_CHAN_CHANGE: {
2329 u32 phymode = __le32_to_cpu(resp->chan_change.phymode);
2330 u32 freq = __le32_to_cpu(resp->chan_change.freq);
2333 __ieee80211_get_channel(ar->hw->wiphy, freq);
2334 ath10k_dbg(ar, ATH10K_DBG_HTT,
2335 "htt chan change freq %u phymode %s\n",
2336 freq, ath10k_wmi_phymode_str(phymode));
2339 case HTT_T2H_MSG_TYPE_AGGR_CONF:
2341 case HTT_T2H_MSG_TYPE_TX_FETCH_IND: {
2342 struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC);
2344 if (!tx_fetch_ind) {
2345 ath10k_warn(ar, "failed to copy htt tx fetch ind\n");
2348 skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind);
2351 case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
2352 ath10k_htt_rx_tx_fetch_confirm(ar, skb);
2354 case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
2355 ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
2357 case HTT_T2H_MSG_TYPE_EN_STATS:
2359 ath10k_warn(ar, "htt event (%d) not handled\n",
2360 resp->hdr.msg_type);
2361 ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2362 skb->data, skb->len);
2367 EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
2369 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
2370 struct sk_buff *skb)
2372 trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
2373 dev_kfree_skb_any(skb);
2375 EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);
2377 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
2379 struct ath10k_htt *htt = &ar->htt;
2380 struct htt_tx_done tx_done = {};
2381 struct sk_buff_head tx_ind_q;
2382 struct sk_buff *skb;
2383 unsigned long flags;
2384 int quota = 0, done, num_rx_msdus;
2385 bool resched_napi = false;
2387 __skb_queue_head_init(&tx_ind_q);
2389 /* Since in-ord-ind can deliver more than 1 A-MSDU in single event,
2390 * process it first to utilize full available quota.
2392 while (quota < budget) {
2393 if (skb_queue_empty(&htt->rx_in_ord_compl_q))
2396 skb = __skb_dequeue(&htt->rx_in_ord_compl_q);
2398 resched_napi = true;
2402 spin_lock_bh(&htt->rx_ring.lock);
2403 num_rx_msdus = ath10k_htt_rx_in_ord_ind(ar, skb);
2404 spin_unlock_bh(&htt->rx_ring.lock);
2405 if (num_rx_msdus < 0) {
2406 resched_napi = true;
2410 dev_kfree_skb_any(skb);
2411 if (num_rx_msdus > 0)
2412 quota += num_rx_msdus;
2414 if ((quota > ATH10K_NAPI_QUOTA_LIMIT) &&
2415 !skb_queue_empty(&htt->rx_in_ord_compl_q)) {
2416 resched_napi = true;
2421 while (quota < budget) {
2422 /* no more data to receive */
2423 if (!atomic_read(&htt->num_mpdus_ready))
2426 num_rx_msdus = ath10k_htt_rx_handle_amsdu(htt);
2427 if (num_rx_msdus < 0) {
2428 resched_napi = true;
2432 quota += num_rx_msdus;
2433 atomic_dec(&htt->num_mpdus_ready);
2434 if ((quota > ATH10K_NAPI_QUOTA_LIMIT) &&
2435 atomic_read(&htt->num_mpdus_ready)) {
2436 resched_napi = true;
2441 /* From NAPI documentation:
2442 * The napi poll() function may also process TX completions, in which
2443 * case if it processes the entire TX ring then it should count that
2444 * work as the rest of the budget.
2446 if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo))
2449 /* kfifo_get: called only within txrx_tasklet so it's neatly serialized.
2450 * From kfifo_get() documentation:
2451 * Note that with only one concurrent reader and one concurrent writer,
2452 * you don't need extra locking to use these macro.
2454 while (kfifo_get(&htt->txdone_fifo, &tx_done))
2455 ath10k_txrx_tx_unref(htt, &tx_done);
2457 ath10k_mac_tx_push_pending(ar);
2459 spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags);
2460 skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q);
2461 spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags);
2463 while ((skb = __skb_dequeue(&tx_ind_q))) {
2464 ath10k_htt_rx_tx_fetch_ind(ar, skb);
2465 dev_kfree_skb_any(skb);
2469 ath10k_htt_rx_msdu_buff_replenish(htt);
2470 /* In case of rx failure or more data to read, report budget
2471 * to reschedule NAPI poll
2473 done = resched_napi ? budget : quota;
2477 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);