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 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 } 135 136 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 } 154 155 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 } 167 168 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 } 189 190 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 } 194 195 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 } 199 200 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 } 235 236 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