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 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 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 if (ar->dev_type != ATH10K_DEV_TYPE_HL) 99 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE); 100 101 ath10k_report_offchan_tx(htt->ar, msdu); 102 103 info = IEEE80211_SKB_CB(msdu); 104 memset(&info->status, 0, sizeof(info->status)); 105 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); 106 107 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 108 info->flags |= IEEE80211_TX_STAT_ACK; 109 110 if (tx_done->status == HTT_TX_COMPL_STATE_NOACK) 111 info->flags &= ~IEEE80211_TX_STAT_ACK; 112 113 if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) && 114 (info->flags & IEEE80211_TX_CTL_NO_ACK)) 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 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 } 136 137 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 } 155 156 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) 157 { 158 struct ath10k_peer *peer; 159 160 lockdep_assert_held(&ar->data_lock); 161 162 list_for_each_entry(peer, &ar->peers, list) 163 if (test_bit(peer_id, peer->peer_ids)) 164 return peer; 165 166 return NULL; 167 } 168 169 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id, 170 const u8 *addr, bool expect_mapped) 171 { 172 long time_left; 173 174 time_left = wait_event_timeout(ar->peer_mapping_wq, ({ 175 bool mapped; 176 177 spin_lock_bh(&ar->data_lock); 178 mapped = !!ath10k_peer_find(ar, vdev_id, addr); 179 spin_unlock_bh(&ar->data_lock); 180 181 (mapped == expect_mapped || 182 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)); 183 }), 3 * HZ); 184 185 if (time_left == 0) 186 return -ETIMEDOUT; 187 188 return 0; 189 } 190 191 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr) 192 { 193 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true); 194 } 195 196 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr) 197 { 198 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false); 199 } 200 201 void ath10k_peer_map_event(struct ath10k_htt *htt, 202 struct htt_peer_map_event *ev) 203 { 204 struct ath10k *ar = htt->ar; 205 struct ath10k_peer *peer; 206 207 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 208 ath10k_warn(ar, 209 "received htt peer map event with idx out of bounds: %hu\n", 210 ev->peer_id); 211 return; 212 } 213 214 spin_lock_bh(&ar->data_lock); 215 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); 216 if (!peer) { 217 peer = kzalloc(sizeof(*peer), GFP_ATOMIC); 218 if (!peer) 219 goto exit; 220 221 peer->vdev_id = ev->vdev_id; 222 ether_addr_copy(peer->addr, ev->addr); 223 list_add(&peer->list, &ar->peers); 224 wake_up(&ar->peer_mapping_wq); 225 } 226 227 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n", 228 ev->vdev_id, ev->addr, ev->peer_id); 229 230 WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer)); 231 ar->peer_map[ev->peer_id] = peer; 232 set_bit(ev->peer_id, peer->peer_ids); 233 exit: 234 spin_unlock_bh(&ar->data_lock); 235 } 236 237 void ath10k_peer_unmap_event(struct ath10k_htt *htt, 238 struct htt_peer_unmap_event *ev) 239 { 240 struct ath10k *ar = htt->ar; 241 struct ath10k_peer *peer; 242 243 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 244 ath10k_warn(ar, 245 "received htt peer unmap event with idx out of bounds: %hu\n", 246 ev->peer_id); 247 return; 248 } 249 250 spin_lock_bh(&ar->data_lock); 251 peer = ath10k_peer_find_by_id(ar, ev->peer_id); 252 if (!peer) { 253 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n", 254 ev->peer_id); 255 goto exit; 256 } 257 258 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n", 259 peer->vdev_id, peer->addr, ev->peer_id); 260 261 ar->peer_map[ev->peer_id] = NULL; 262 clear_bit(ev->peer_id, peer->peer_ids); 263 264 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) { 265 list_del(&peer->list); 266 kfree(peer); 267 wake_up(&ar->peer_mapping_wq); 268 } 269 270 exit: 271 spin_unlock_bh(&ar->data_lock); 272 } 273