1 /*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
4 *
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.
8 *
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.
16 */
17
18 #include "core.h"
19 #include "txrx.h"
20 #include "htt.h"
21 #include "mac.h"
22 #include "debug.h"
23
ath10k_report_offchan_tx(struct ath10k * ar,struct sk_buff * skb)24 static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
25 {
26 if (!ATH10K_SKB_CB(skb)->htt.is_offchan)
27 return;
28
29 /* If the original wait_for_completion() timed out before
30 * {data,mgmt}_tx_completed() was called then we could complete
31 * offchan_tx_completed for a different skb. Prevent this by using
32 * offchan_tx_skb. */
33 spin_lock_bh(&ar->data_lock);
34 if (ar->offchan_tx_skb != skb) {
35 ath10k_warn(ar, "completed old offchannel frame\n");
36 goto out;
37 }
38
39 complete(&ar->offchan_tx_completed);
40 ar->offchan_tx_skb = NULL; /* just for sanity */
41
42 ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %p\n", skb);
43 out:
44 spin_unlock_bh(&ar->data_lock);
45 }
46
ath10k_txrx_tx_unref(struct ath10k_htt * htt,const struct htt_tx_done * tx_done)47 void ath10k_txrx_tx_unref(struct ath10k_htt *htt,
48 const struct htt_tx_done *tx_done)
49 {
50 struct ath10k *ar = htt->ar;
51 struct device *dev = ar->dev;
52 struct ieee80211_tx_info *info;
53 struct ath10k_skb_cb *skb_cb;
54 struct sk_buff *msdu;
55 struct ieee80211_hdr *hdr;
56 __le16 fc;
57 bool limit_mgmt_desc = false;
58
59 ath10k_dbg(ar, ATH10K_DBG_HTT,
60 "htt tx completion msdu_id %u discard %d no_ack %d success %d\n",
61 tx_done->msdu_id, !!tx_done->discard,
62 !!tx_done->no_ack, !!tx_done->success);
63
64 if (tx_done->msdu_id >= htt->max_num_pending_tx) {
65 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
66 tx_done->msdu_id);
67 return;
68 }
69
70 spin_lock_bh(&htt->tx_lock);
71 msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
72 if (!msdu) {
73 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
74 tx_done->msdu_id);
75 spin_unlock_bh(&htt->tx_lock);
76 return;
77 }
78
79 hdr = (struct ieee80211_hdr *)msdu->data;
80 fc = hdr->frame_control;
81
82 if (unlikely(ieee80211_is_mgmt(fc)) &&
83 ar->hw_params.max_probe_resp_desc_thres)
84 limit_mgmt_desc = true;
85
86 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
87 __ath10k_htt_tx_dec_pending(htt, limit_mgmt_desc);
88 if (htt->num_pending_tx == 0)
89 wake_up(&htt->empty_tx_wq);
90 spin_unlock_bh(&htt->tx_lock);
91
92 skb_cb = ATH10K_SKB_CB(msdu);
93 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
94
95 ath10k_report_offchan_tx(htt->ar, msdu);
96
97 info = IEEE80211_SKB_CB(msdu);
98 memset(&info->status, 0, sizeof(info->status));
99 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
100
101 if (tx_done->discard) {
102 ieee80211_free_txskb(htt->ar->hw, msdu);
103 return;
104 }
105
106 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
107 info->flags |= IEEE80211_TX_STAT_ACK;
108
109 if (tx_done->no_ack)
110 info->flags &= ~IEEE80211_TX_STAT_ACK;
111
112 if (tx_done->success && (info->flags & IEEE80211_TX_CTL_NO_ACK))
113 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
114
115 ieee80211_tx_status(htt->ar->hw, msdu);
116 /* we do not own the msdu anymore */
117 }
118
ath10k_peer_find(struct ath10k * ar,int vdev_id,const u8 * addr)119 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
120 const u8 *addr)
121 {
122 struct ath10k_peer *peer;
123
124 lockdep_assert_held(&ar->data_lock);
125
126 list_for_each_entry(peer, &ar->peers, list) {
127 if (peer->vdev_id != vdev_id)
128 continue;
129 if (memcmp(peer->addr, addr, ETH_ALEN))
130 continue;
131
132 return peer;
133 }
134
135 return NULL;
136 }
137
ath10k_peer_find_by_id(struct ath10k * ar,int peer_id)138 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
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 (test_bit(peer_id, peer->peer_ids))
146 return peer;
147
148 return NULL;
149 }
150
ath10k_wait_for_peer_common(struct ath10k * ar,int vdev_id,const u8 * addr,bool expect_mapped)151 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
152 const u8 *addr, bool expect_mapped)
153 {
154 long time_left;
155
156 time_left = wait_event_timeout(ar->peer_mapping_wq, ({
157 bool mapped;
158
159 spin_lock_bh(&ar->data_lock);
160 mapped = !!ath10k_peer_find(ar, vdev_id, addr);
161 spin_unlock_bh(&ar->data_lock);
162
163 (mapped == expect_mapped ||
164 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
165 }), 3*HZ);
166
167 if (time_left == 0)
168 return -ETIMEDOUT;
169
170 return 0;
171 }
172
ath10k_wait_for_peer_created(struct ath10k * ar,int vdev_id,const u8 * addr)173 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
174 {
175 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
176 }
177
ath10k_wait_for_peer_deleted(struct ath10k * ar,int vdev_id,const u8 * addr)178 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
179 {
180 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
181 }
182
ath10k_peer_map_event(struct ath10k_htt * htt,struct htt_peer_map_event * ev)183 void ath10k_peer_map_event(struct ath10k_htt *htt,
184 struct htt_peer_map_event *ev)
185 {
186 struct ath10k *ar = htt->ar;
187 struct ath10k_peer *peer;
188
189 spin_lock_bh(&ar->data_lock);
190 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
191 if (!peer) {
192 peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
193 if (!peer)
194 goto exit;
195
196 peer->vdev_id = ev->vdev_id;
197 ether_addr_copy(peer->addr, ev->addr);
198 list_add(&peer->list, &ar->peers);
199 wake_up(&ar->peer_mapping_wq);
200 }
201
202 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
203 ev->vdev_id, ev->addr, ev->peer_id);
204
205 set_bit(ev->peer_id, peer->peer_ids);
206 exit:
207 spin_unlock_bh(&ar->data_lock);
208 }
209
ath10k_peer_unmap_event(struct ath10k_htt * htt,struct htt_peer_unmap_event * ev)210 void ath10k_peer_unmap_event(struct ath10k_htt *htt,
211 struct htt_peer_unmap_event *ev)
212 {
213 struct ath10k *ar = htt->ar;
214 struct ath10k_peer *peer;
215
216 spin_lock_bh(&ar->data_lock);
217 peer = ath10k_peer_find_by_id(ar, ev->peer_id);
218 if (!peer) {
219 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
220 ev->peer_id);
221 goto exit;
222 }
223
224 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
225 peer->vdev_id, peer->addr, ev->peer_id);
226
227 clear_bit(ev->peer_id, peer->peer_ids);
228
229 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
230 list_del(&peer->list);
231 kfree(peer);
232 wake_up(&ar->peer_mapping_wq);
233 }
234
235 exit:
236 spin_unlock_bh(&ar->data_lock);
237 }
238