1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (c) 2005-2011 Atheros Communications Inc.
4 * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
5 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
6 */
7
8#include "core.h"
9#include "txrx.h"
10#include "htt.h"
11#include "mac.h"
12#include "debug.h"
13
14static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
15{
16	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
17
18	if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
19		return;
20
21	if (ath10k_mac_tx_frm_has_freq(ar))
22		return;
23
24	/* If the original wait_for_completion() timed out before
25	 * {data,mgmt}_tx_completed() was called then we could complete
26	 * offchan_tx_completed for a different skb. Prevent this by using
27	 * offchan_tx_skb.
28	 */
29	spin_lock_bh(&ar->data_lock);
30	if (ar->offchan_tx_skb != skb) {
31		ath10k_warn(ar, "completed old offchannel frame\n");
32		goto out;
33	}
34
35	complete(&ar->offchan_tx_completed);
36	ar->offchan_tx_skb = NULL; /* just for sanity */
37
38	ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
39out:
40	spin_unlock_bh(&ar->data_lock);
41}
42
43int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
44			 const struct htt_tx_done *tx_done)
45{
46	struct ieee80211_tx_status status;
47	struct ath10k *ar = htt->ar;
48	struct device *dev = ar->dev;
49	struct ieee80211_tx_info *info;
50	struct ieee80211_txq *txq;
51	struct ath10k_skb_cb *skb_cb;
52	struct ath10k_txq *artxq;
53	struct sk_buff *msdu;
54	u8 flags;
55
56	ath10k_dbg(ar, ATH10K_DBG_HTT,
57		   "htt tx completion msdu_id %u status %d\n",
58		   tx_done->msdu_id, tx_done->status);
59
60	if (tx_done->msdu_id >= htt->max_num_pending_tx) {
61		ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
62			    tx_done->msdu_id);
63		return -EINVAL;
64	}
65
66	spin_lock_bh(&htt->tx_lock);
67	msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
68	if (!msdu) {
69		ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
70			    tx_done->msdu_id);
71		spin_unlock_bh(&htt->tx_lock);
72		return -ENOENT;
73	}
74
75	skb_cb = ATH10K_SKB_CB(msdu);
76	txq = skb_cb->txq;
77
78	if (txq) {
79		artxq = (void *)txq->drv_priv;
80		artxq->num_fw_queued--;
81	}
82
83	flags = skb_cb->flags;
84	ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
85	ath10k_htt_tx_dec_pending(htt);
86	spin_unlock_bh(&htt->tx_lock);
87
88	rcu_read_lock();
89	if (txq && txq->sta && skb_cb->airtime_est)
90		ieee80211_sta_register_airtime(txq->sta, txq->tid,
91					       skb_cb->airtime_est, 0);
92	rcu_read_unlock();
93
94	if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
95		dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
96
97	ath10k_report_offchan_tx(htt->ar, msdu);
98
99	info = IEEE80211_SKB_CB(msdu);
100	memset(&info->status, 0, sizeof(info->status));
101	info->status.rates[0].idx = -1;
102
103	trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
104
105	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
106	    !(flags & ATH10K_SKB_F_NOACK_TID))
107		info->flags |= IEEE80211_TX_STAT_ACK;
108
109	if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
110		info->flags &= ~IEEE80211_TX_STAT_ACK;
111
112	if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
113	    ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
114	    (flags & ATH10K_SKB_F_NOACK_TID)))
115		info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
116
117	if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
118		if ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
119		    (flags & ATH10K_SKB_F_NOACK_TID))
120			info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
121		else
122			info->flags &= ~IEEE80211_TX_STAT_ACK;
123	}
124
125	if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
126	    tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
127		info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
128						tx_done->ack_rssi;
129		info->status.flags |= IEEE80211_TX_STATUS_ACK_SIGNAL_VALID;
130	}
131
132	memset(&status, 0, sizeof(status));
133	status.skb = msdu;
134	status.info = info;
135
136	rcu_read_lock();
137
138	if (txq)
139		status.sta = txq->sta;
140
141	ieee80211_tx_status_ext(htt->ar->hw, &status);
142
143	rcu_read_unlock();
144
145	/* we do not own the msdu anymore */
146
147	return 0;
148}
149
150struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
151				     const u8 *addr)
152{
153	struct ath10k_peer *peer;
154
155	lockdep_assert_held(&ar->data_lock);
156
157	list_for_each_entry(peer, &ar->peers, list) {
158		if (peer->vdev_id != vdev_id)
159			continue;
160		if (!ether_addr_equal(peer->addr, addr))
161			continue;
162
163		return peer;
164	}
165
166	return NULL;
167}
168
169struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
170{
171	struct ath10k_peer *peer;
172
173	if (peer_id >= BITS_PER_TYPE(peer->peer_ids))
174		return NULL;
175
176	lockdep_assert_held(&ar->data_lock);
177
178	list_for_each_entry(peer, &ar->peers, list)
179		if (test_bit(peer_id, peer->peer_ids))
180			return peer;
181
182	return NULL;
183}
184
185static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
186				       const u8 *addr, bool expect_mapped)
187{
188	long time_left;
189
190	time_left = wait_event_timeout(ar->peer_mapping_wq, ({
191			bool mapped;
192
193			spin_lock_bh(&ar->data_lock);
194			mapped = !!ath10k_peer_find(ar, vdev_id, addr);
195			spin_unlock_bh(&ar->data_lock);
196
197			(mapped == expect_mapped ||
198			 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
199		}), 3 * HZ);
200
201	if (time_left == 0)
202		return -ETIMEDOUT;
203
204	return 0;
205}
206
207int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
208{
209	return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
210}
211
212int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
213{
214	return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
215}
216
217void ath10k_peer_map_event(struct ath10k_htt *htt,
218			   struct htt_peer_map_event *ev)
219{
220	struct ath10k *ar = htt->ar;
221	struct ath10k_peer *peer;
222
223	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
224		ath10k_warn(ar,
225			    "received htt peer map event with idx out of bounds: %u\n",
226			    ev->peer_id);
227		return;
228	}
229
230	spin_lock_bh(&ar->data_lock);
231	peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
232	if (!peer) {
233		peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
234		if (!peer)
235			goto exit;
236
237		peer->vdev_id = ev->vdev_id;
238		ether_addr_copy(peer->addr, ev->addr);
239		list_add(&peer->list, &ar->peers);
240		wake_up(&ar->peer_mapping_wq);
241	}
242
243	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
244		   ev->vdev_id, ev->addr, ev->peer_id);
245
246	WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
247	ar->peer_map[ev->peer_id] = peer;
248	set_bit(ev->peer_id, peer->peer_ids);
249exit:
250	spin_unlock_bh(&ar->data_lock);
251}
252
253void ath10k_peer_unmap_event(struct ath10k_htt *htt,
254			     struct htt_peer_unmap_event *ev)
255{
256	struct ath10k *ar = htt->ar;
257	struct ath10k_peer *peer;
258
259	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
260		ath10k_warn(ar,
261			    "received htt peer unmap event with idx out of bounds: %u\n",
262			    ev->peer_id);
263		return;
264	}
265
266	spin_lock_bh(&ar->data_lock);
267	peer = ath10k_peer_find_by_id(ar, ev->peer_id);
268	if (!peer) {
269		ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
270			    ev->peer_id);
271		goto exit;
272	}
273
274	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
275		   peer->vdev_id, peer->addr, ev->peer_id);
276
277	ar->peer_map[ev->peer_id] = NULL;
278	clear_bit(ev->peer_id, peer->peer_ids);
279
280	if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
281		list_del(&peer->list);
282		kfree(peer);
283		wake_up(&ar->peer_mapping_wq);
284	}
285
286exit:
287	spin_unlock_bh(&ar->data_lock);
288}
289