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
ath10k_report_offchan_tx(struct ath10k * ar,struct sk_buff * skb)14 static 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);
39 out:
40 spin_unlock_bh(&ar->data_lock);
41 }
42
ath10k_txrx_tx_unref(struct ath10k_htt * htt,const struct htt_tx_done * tx_done)43 int 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
ath10k_peer_find(struct ath10k * ar,int vdev_id,const u8 * addr)137 struct 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
ath10k_peer_find_by_id(struct ath10k * ar,int peer_id)156 struct 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
ath10k_wait_for_peer_common(struct ath10k * ar,int vdev_id,const u8 * addr,bool expect_mapped)172 static 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
ath10k_wait_for_peer_created(struct ath10k * ar,int vdev_id,const u8 * addr)194 int 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
ath10k_wait_for_peer_deleted(struct ath10k * ar,int vdev_id,const u8 * addr)199 int 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
ath10k_peer_map_event(struct ath10k_htt * htt,struct htt_peer_map_event * ev)204 void 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);
236 exit:
237 spin_unlock_bh(&ar->data_lock);
238 }
239
ath10k_peer_unmap_event(struct ath10k_htt * htt,struct htt_peer_unmap_event * ev)240 void 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
273 exit:
274 spin_unlock_bh(&ar->data_lock);
275 }
276