1 /*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
4 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include "core.h"
20 #include "txrx.h"
21 #include "htt.h"
22 #include "mac.h"
23 #include "debug.h"
24
ath10k_report_offchan_tx(struct ath10k * ar,struct sk_buff * skb)25 static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
26 {
27 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
28
29 if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
30 return;
31
32 if (ath10k_mac_tx_frm_has_freq(ar))
33 return;
34
35 /* If the original wait_for_completion() timed out before
36 * {data,mgmt}_tx_completed() was called then we could complete
37 * offchan_tx_completed for a different skb. Prevent this by using
38 * offchan_tx_skb.
39 */
40 spin_lock_bh(&ar->data_lock);
41 if (ar->offchan_tx_skb != skb) {
42 ath10k_warn(ar, "completed old offchannel frame\n");
43 goto out;
44 }
45
46 complete(&ar->offchan_tx_completed);
47 ar->offchan_tx_skb = NULL; /* just for sanity */
48
49 ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
50 out:
51 spin_unlock_bh(&ar->data_lock);
52 }
53
ath10k_txrx_tx_unref(struct ath10k_htt * htt,const struct htt_tx_done * tx_done)54 int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
55 const struct htt_tx_done *tx_done)
56 {
57 struct ath10k *ar = htt->ar;
58 struct device *dev = ar->dev;
59 struct ieee80211_tx_info *info;
60 struct ieee80211_txq *txq;
61 struct ath10k_skb_cb *skb_cb;
62 struct ath10k_txq *artxq;
63 struct sk_buff *msdu;
64
65 ath10k_dbg(ar, ATH10K_DBG_HTT,
66 "htt tx completion msdu_id %u status %d\n",
67 tx_done->msdu_id, tx_done->status);
68
69 if (tx_done->msdu_id >= htt->max_num_pending_tx) {
70 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
71 tx_done->msdu_id);
72 return -EINVAL;
73 }
74
75 spin_lock_bh(&htt->tx_lock);
76 msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
77 if (!msdu) {
78 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
79 tx_done->msdu_id);
80 spin_unlock_bh(&htt->tx_lock);
81 return -ENOENT;
82 }
83
84 skb_cb = ATH10K_SKB_CB(msdu);
85 txq = skb_cb->txq;
86
87 if (txq) {
88 artxq = (void *)txq->drv_priv;
89 artxq->num_fw_queued--;
90 }
91
92 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
93 ath10k_htt_tx_dec_pending(htt);
94 if (htt->num_pending_tx == 0)
95 wake_up(&htt->empty_tx_wq);
96 spin_unlock_bh(&htt->tx_lock);
97
98 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
99
100 ath10k_report_offchan_tx(htt->ar, msdu);
101
102 info = IEEE80211_SKB_CB(msdu);
103 memset(&info->status, 0, sizeof(info->status));
104 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
105
106 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
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 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 info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
119 else
120 info->flags &= ~IEEE80211_TX_STAT_ACK;
121 }
122
123 if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
124 tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
125 info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
126 tx_done->ack_rssi;
127 info->status.is_valid_ack_signal = true;
128 }
129
130 ieee80211_tx_status(htt->ar->hw, msdu);
131 /* we do not own the msdu anymore */
132
133 return 0;
134 }
135
ath10k_peer_find(struct ath10k * ar,int vdev_id,const u8 * addr)136 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
137 const u8 *addr)
138 {
139 struct ath10k_peer *peer;
140
141 lockdep_assert_held(&ar->data_lock);
142
143 list_for_each_entry(peer, &ar->peers, list) {
144 if (peer->vdev_id != vdev_id)
145 continue;
146 if (!ether_addr_equal(peer->addr, addr))
147 continue;
148
149 return peer;
150 }
151
152 return NULL;
153 }
154
ath10k_peer_find_by_id(struct ath10k * ar,int peer_id)155 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
156 {
157 struct ath10k_peer *peer;
158
159 lockdep_assert_held(&ar->data_lock);
160
161 list_for_each_entry(peer, &ar->peers, list)
162 if (test_bit(peer_id, peer->peer_ids))
163 return peer;
164
165 return NULL;
166 }
167
ath10k_wait_for_peer_common(struct ath10k * ar,int vdev_id,const u8 * addr,bool expect_mapped)168 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
169 const u8 *addr, bool expect_mapped)
170 {
171 long time_left;
172
173 time_left = wait_event_timeout(ar->peer_mapping_wq, ({
174 bool mapped;
175
176 spin_lock_bh(&ar->data_lock);
177 mapped = !!ath10k_peer_find(ar, vdev_id, addr);
178 spin_unlock_bh(&ar->data_lock);
179
180 (mapped == expect_mapped ||
181 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
182 }), 3 * HZ);
183
184 if (time_left == 0)
185 return -ETIMEDOUT;
186
187 return 0;
188 }
189
ath10k_wait_for_peer_created(struct ath10k * ar,int vdev_id,const u8 * addr)190 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
191 {
192 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
193 }
194
ath10k_wait_for_peer_deleted(struct ath10k * ar,int vdev_id,const u8 * addr)195 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
196 {
197 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
198 }
199
ath10k_peer_map_event(struct ath10k_htt * htt,struct htt_peer_map_event * ev)200 void ath10k_peer_map_event(struct ath10k_htt *htt,
201 struct htt_peer_map_event *ev)
202 {
203 struct ath10k *ar = htt->ar;
204 struct ath10k_peer *peer;
205
206 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
207 ath10k_warn(ar,
208 "received htt peer map event with idx out of bounds: %hu\n",
209 ev->peer_id);
210 return;
211 }
212
213 spin_lock_bh(&ar->data_lock);
214 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
215 if (!peer) {
216 peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
217 if (!peer)
218 goto exit;
219
220 peer->vdev_id = ev->vdev_id;
221 ether_addr_copy(peer->addr, ev->addr);
222 list_add(&peer->list, &ar->peers);
223 wake_up(&ar->peer_mapping_wq);
224 }
225
226 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
227 ev->vdev_id, ev->addr, ev->peer_id);
228
229 WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
230 ar->peer_map[ev->peer_id] = peer;
231 set_bit(ev->peer_id, peer->peer_ids);
232 exit:
233 spin_unlock_bh(&ar->data_lock);
234 }
235
ath10k_peer_unmap_event(struct ath10k_htt * htt,struct htt_peer_unmap_event * ev)236 void ath10k_peer_unmap_event(struct ath10k_htt *htt,
237 struct htt_peer_unmap_event *ev)
238 {
239 struct ath10k *ar = htt->ar;
240 struct ath10k_peer *peer;
241
242 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
243 ath10k_warn(ar,
244 "received htt peer unmap event with idx out of bounds: %hu\n",
245 ev->peer_id);
246 return;
247 }
248
249 spin_lock_bh(&ar->data_lock);
250 peer = ath10k_peer_find_by_id(ar, ev->peer_id);
251 if (!peer) {
252 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
253 ev->peer_id);
254 goto exit;
255 }
256
257 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
258 peer->vdev_id, peer->addr, ev->peer_id);
259
260 ar->peer_map[ev->peer_id] = NULL;
261 clear_bit(ev->peer_id, peer->peer_ids);
262
263 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
264 list_del(&peer->list);
265 kfree(peer);
266 wake_up(&ar->peer_mapping_wq);
267 }
268
269 exit:
270 spin_unlock_bh(&ar->data_lock);
271 }
272
