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 ath10k *ar = htt->ar;
47	struct device *dev = ar->dev;
48	struct ieee80211_tx_info *info;
49	struct ieee80211_txq *txq;
50	struct ath10k_skb_cb *skb_cb;
51	struct ath10k_txq *artxq;
52	struct sk_buff *msdu;
53	u8 flags;
54
55	ath10k_dbg(ar, ATH10K_DBG_HTT,
56		   "htt tx completion msdu_id %u status %d\n",
57		   tx_done->msdu_id, tx_done->status);
58
59	if (tx_done->msdu_id >= htt->max_num_pending_tx) {
60		ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
61			    tx_done->msdu_id);
62		return -EINVAL;
63	}
64
65	spin_lock_bh(&htt->tx_lock);
66	msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
67	if (!msdu) {
68		ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
69			    tx_done->msdu_id);
70		spin_unlock_bh(&htt->tx_lock);
71		return -ENOENT;
72	}
73
74	skb_cb = ATH10K_SKB_CB(msdu);
75	txq = skb_cb->txq;
76
77	if (txq) {
78		artxq = (void *)txq->drv_priv;
79		artxq->num_fw_queued--;
80	}
81
82	flags = skb_cb->flags;
83	ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
84	ath10k_htt_tx_dec_pending(htt);
85	spin_unlock_bh(&htt->tx_lock);
86
87	rcu_read_lock();
88	if (txq && txq->sta && skb_cb->airtime_est)
89		ieee80211_sta_register_airtime(txq->sta, txq->tid,
90					       skb_cb->airtime_est, 0);
91	rcu_read_unlock();
92
93	if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
94		dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
95
96	ath10k_report_offchan_tx(htt->ar, msdu);
97
98	info = IEEE80211_SKB_CB(msdu);
99	memset(&info->status, 0, sizeof(info->status));
100	info->status.rates[0].idx = -1;
101
102	trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
103
104	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
105	    !(flags & ATH10K_SKB_F_NOACK_TID))
106		info->flags |= IEEE80211_TX_STAT_ACK;
107
108	if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
109		info->flags &= ~IEEE80211_TX_STAT_ACK;
110
111	if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
112	    ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
113	    (flags & ATH10K_SKB_F_NOACK_TID)))
114		info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
115
116	if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
117		if ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
118		    (flags & ATH10K_SKB_F_NOACK_TID))
119			info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
120		else
121			info->flags &= ~IEEE80211_TX_STAT_ACK;
122	}
123
124	if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
125	    tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
126		info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
127						tx_done->ack_rssi;
128		info->status.is_valid_ack_signal = true;
129	}
130
131	ieee80211_tx_status(htt->ar->hw, msdu);
132	/* we do not own the msdu anymore */
133
134	return 0;
135}
136
137struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
138				     const u8 *addr)
139{
140	struct ath10k_peer *peer;
141
142	lockdep_assert_held(&ar->data_lock);
143
144	list_for_each_entry(peer, &ar->peers, list) {
145		if (peer->vdev_id != vdev_id)
146			continue;
147		if (!ether_addr_equal(peer->addr, addr))
148			continue;
149
150		return peer;
151	}
152
153	return NULL;
154}
155
156struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
157{
158	struct ath10k_peer *peer;
159
160	if (peer_id >= BITS_PER_TYPE(peer->peer_ids))
161		return NULL;
162
163	lockdep_assert_held(&ar->data_lock);
164
165	list_for_each_entry(peer, &ar->peers, list)
166		if (test_bit(peer_id, peer->peer_ids))
167			return peer;
168
169	return NULL;
170}
171
172static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
173				       const u8 *addr, bool expect_mapped)
174{
175	long time_left;
176
177	time_left = wait_event_timeout(ar->peer_mapping_wq, ({
178			bool mapped;
179
180			spin_lock_bh(&ar->data_lock);
181			mapped = !!ath10k_peer_find(ar, vdev_id, addr);
182			spin_unlock_bh(&ar->data_lock);
183
184			(mapped == expect_mapped ||
185			 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
186		}), 3 * HZ);
187
188	if (time_left == 0)
189		return -ETIMEDOUT;
190
191	return 0;
192}
193
194int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
195{
196	return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
197}
198
199int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
200{
201	return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
202}
203
204void ath10k_peer_map_event(struct ath10k_htt *htt,
205			   struct htt_peer_map_event *ev)
206{
207	struct ath10k *ar = htt->ar;
208	struct ath10k_peer *peer;
209
210	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
211		ath10k_warn(ar,
212			    "received htt peer map event with idx out of bounds: %hu\n",
213			    ev->peer_id);
214		return;
215	}
216
217	spin_lock_bh(&ar->data_lock);
218	peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
219	if (!peer) {
220		peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
221		if (!peer)
222			goto exit;
223
224		peer->vdev_id = ev->vdev_id;
225		ether_addr_copy(peer->addr, ev->addr);
226		list_add(&peer->list, &ar->peers);
227		wake_up(&ar->peer_mapping_wq);
228	}
229
230	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
231		   ev->vdev_id, ev->addr, ev->peer_id);
232
233	WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
234	ar->peer_map[ev->peer_id] = peer;
235	set_bit(ev->peer_id, peer->peer_ids);
236exit:
237	spin_unlock_bh(&ar->data_lock);
238}
239
240void ath10k_peer_unmap_event(struct ath10k_htt *htt,
241			     struct htt_peer_unmap_event *ev)
242{
243	struct ath10k *ar = htt->ar;
244	struct ath10k_peer *peer;
245
246	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
247		ath10k_warn(ar,
248			    "received htt peer unmap event with idx out of bounds: %hu\n",
249			    ev->peer_id);
250		return;
251	}
252
253	spin_lock_bh(&ar->data_lock);
254	peer = ath10k_peer_find_by_id(ar, ev->peer_id);
255	if (!peer) {
256		ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
257			    ev->peer_id);
258		goto exit;
259	}
260
261	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
262		   peer->vdev_id, peer->addr, ev->peer_id);
263
264	ar->peer_map[ev->peer_id] = NULL;
265	clear_bit(ev->peer_id, peer->peer_ids);
266
267	if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
268		list_del(&peer->list);
269		kfree(peer);
270		wake_up(&ar->peer_mapping_wq);
271	}
272
273exit:
274	spin_unlock_bh(&ar->data_lock);
275}
276