1 /* 2 * Copyright (c) 2005-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2016 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 24 static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb) 25 { 26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 27 28 if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN))) 29 return; 30 31 if (ath10k_mac_tx_frm_has_freq(ar)) 32 return; 33 34 /* If the original wait_for_completion() timed out before 35 * {data,mgmt}_tx_completed() was called then we could complete 36 * offchan_tx_completed for a different skb. Prevent this by using 37 * offchan_tx_skb. 38 */ 39 spin_lock_bh(&ar->data_lock); 40 if (ar->offchan_tx_skb != skb) { 41 ath10k_warn(ar, "completed old offchannel frame\n"); 42 goto out; 43 } 44 45 complete(&ar->offchan_tx_completed); 46 ar->offchan_tx_skb = NULL; /* just for sanity */ 47 48 ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb); 49 out: 50 spin_unlock_bh(&ar->data_lock); 51 } 52 53 int ath10k_txrx_tx_unref(struct ath10k_htt *htt, 54 const struct htt_tx_done *tx_done) 55 { 56 struct ath10k *ar = htt->ar; 57 struct device *dev = ar->dev; 58 struct ieee80211_tx_info *info; 59 struct ieee80211_txq *txq; 60 struct ath10k_skb_cb *skb_cb; 61 struct ath10k_txq *artxq; 62 struct sk_buff *msdu; 63 64 ath10k_dbg(ar, ATH10K_DBG_HTT, 65 "htt tx completion msdu_id %u status %d\n", 66 tx_done->msdu_id, tx_done->status); 67 68 if (tx_done->msdu_id >= htt->max_num_pending_tx) { 69 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n", 70 tx_done->msdu_id); 71 return -EINVAL; 72 } 73 74 spin_lock_bh(&htt->tx_lock); 75 msdu = idr_find(&htt->pending_tx, tx_done->msdu_id); 76 if (!msdu) { 77 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n", 78 tx_done->msdu_id); 79 spin_unlock_bh(&htt->tx_lock); 80 return -ENOENT; 81 } 82 83 skb_cb = ATH10K_SKB_CB(msdu); 84 txq = skb_cb->txq; 85 86 if (txq) { 87 artxq = (void *)txq->drv_priv; 88 artxq->num_fw_queued--; 89 } 90 91 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); 92 ath10k_htt_tx_dec_pending(htt); 93 if (htt->num_pending_tx == 0) 94 wake_up(&htt->empty_tx_wq); 95 spin_unlock_bh(&htt->tx_lock); 96 97 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE); 98 99 ath10k_report_offchan_tx(htt->ar, msdu); 100 101 info = IEEE80211_SKB_CB(msdu); 102 memset(&info->status, 0, sizeof(info->status)); 103 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); 104 105 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 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 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; 114 115 if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) { 116 if (info->flags & IEEE80211_TX_CTL_NO_ACK) 117 info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED; 118 else 119 info->flags &= ~IEEE80211_TX_STAT_ACK; 120 } 121 122 ieee80211_tx_status(htt->ar->hw, msdu); 123 /* we do not own the msdu anymore */ 124 125 return 0; 126 } 127 128 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id, 129 const u8 *addr) 130 { 131 struct ath10k_peer *peer; 132 133 lockdep_assert_held(&ar->data_lock); 134 135 list_for_each_entry(peer, &ar->peers, list) { 136 if (peer->vdev_id != vdev_id) 137 continue; 138 if (!ether_addr_equal(peer->addr, addr)) 139 continue; 140 141 return peer; 142 } 143 144 return NULL; 145 } 146 147 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) 148 { 149 struct ath10k_peer *peer; 150 151 lockdep_assert_held(&ar->data_lock); 152 153 list_for_each_entry(peer, &ar->peers, list) 154 if (test_bit(peer_id, peer->peer_ids)) 155 return peer; 156 157 return NULL; 158 } 159 160 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id, 161 const u8 *addr, bool expect_mapped) 162 { 163 long time_left; 164 165 time_left = wait_event_timeout(ar->peer_mapping_wq, ({ 166 bool mapped; 167 168 spin_lock_bh(&ar->data_lock); 169 mapped = !!ath10k_peer_find(ar, vdev_id, addr); 170 spin_unlock_bh(&ar->data_lock); 171 172 (mapped == expect_mapped || 173 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)); 174 }), 3 * HZ); 175 176 if (time_left == 0) 177 return -ETIMEDOUT; 178 179 return 0; 180 } 181 182 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr) 183 { 184 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true); 185 } 186 187 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr) 188 { 189 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false); 190 } 191 192 void ath10k_peer_map_event(struct ath10k_htt *htt, 193 struct htt_peer_map_event *ev) 194 { 195 struct ath10k *ar = htt->ar; 196 struct ath10k_peer *peer; 197 198 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 199 ath10k_warn(ar, 200 "received htt peer map event with idx out of bounds: %hu\n", 201 ev->peer_id); 202 return; 203 } 204 205 spin_lock_bh(&ar->data_lock); 206 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); 207 if (!peer) { 208 peer = kzalloc(sizeof(*peer), GFP_ATOMIC); 209 if (!peer) 210 goto exit; 211 212 peer->vdev_id = ev->vdev_id; 213 ether_addr_copy(peer->addr, ev->addr); 214 list_add(&peer->list, &ar->peers); 215 wake_up(&ar->peer_mapping_wq); 216 } 217 218 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n", 219 ev->vdev_id, ev->addr, ev->peer_id); 220 221 WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer)); 222 ar->peer_map[ev->peer_id] = peer; 223 set_bit(ev->peer_id, peer->peer_ids); 224 exit: 225 spin_unlock_bh(&ar->data_lock); 226 } 227 228 void ath10k_peer_unmap_event(struct ath10k_htt *htt, 229 struct htt_peer_unmap_event *ev) 230 { 231 struct ath10k *ar = htt->ar; 232 struct ath10k_peer *peer; 233 234 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 235 ath10k_warn(ar, 236 "received htt peer unmap event with idx out of bounds: %hu\n", 237 ev->peer_id); 238 return; 239 } 240 241 spin_lock_bh(&ar->data_lock); 242 peer = ath10k_peer_find_by_id(ar, ev->peer_id); 243 if (!peer) { 244 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n", 245 ev->peer_id); 246 goto exit; 247 } 248 249 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n", 250 peer->vdev_id, peer->addr, ev->peer_id); 251 252 ar->peer_map[ev->peer_id] = NULL; 253 clear_bit(ev->peer_id, peer->peer_ids); 254 255 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) { 256 list_del(&peer->list); 257 kfree(peer); 258 wake_up(&ar->peer_mapping_wq); 259 } 260 261 exit: 262 spin_unlock_bh(&ar->data_lock); 263 } 264