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 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 spin_lock_bh(&ar->data_lock); 39 if (ar->offchan_tx_skb != skb) { 40 ath10k_warn(ar, "completed old offchannel frame\n"); 41 goto out; 42 } 43 44 complete(&ar->offchan_tx_completed); 45 ar->offchan_tx_skb = NULL; /* just for sanity */ 46 47 ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb); 48 out: 49 spin_unlock_bh(&ar->data_lock); 50 } 51 52 int ath10k_txrx_tx_unref(struct ath10k_htt *htt, 53 const struct htt_tx_done *tx_done) 54 { 55 struct ath10k *ar = htt->ar; 56 struct device *dev = ar->dev; 57 struct ieee80211_tx_info *info; 58 struct ieee80211_txq *txq; 59 struct ath10k_skb_cb *skb_cb; 60 struct ath10k_txq *artxq; 61 struct sk_buff *msdu; 62 63 ath10k_dbg(ar, ATH10K_DBG_HTT, 64 "htt tx completion msdu_id %u status %d\n", 65 tx_done->msdu_id, tx_done->status); 66 67 if (tx_done->msdu_id >= htt->max_num_pending_tx) { 68 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n", 69 tx_done->msdu_id); 70 return -EINVAL; 71 } 72 73 spin_lock_bh(&htt->tx_lock); 74 msdu = idr_find(&htt->pending_tx, tx_done->msdu_id); 75 if (!msdu) { 76 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n", 77 tx_done->msdu_id); 78 spin_unlock_bh(&htt->tx_lock); 79 return -ENOENT; 80 } 81 82 skb_cb = ATH10K_SKB_CB(msdu); 83 txq = skb_cb->txq; 84 85 if (txq) { 86 artxq = (void *)txq->drv_priv; 87 artxq->num_fw_queued--; 88 } 89 90 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); 91 ath10k_htt_tx_dec_pending(htt); 92 if (htt->num_pending_tx == 0) 93 wake_up(&htt->empty_tx_wq); 94 spin_unlock_bh(&htt->tx_lock); 95 96 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE); 97 98 ath10k_report_offchan_tx(htt->ar, msdu); 99 100 info = IEEE80211_SKB_CB(msdu); 101 memset(&info->status, 0, sizeof(info->status)); 102 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); 103 104 if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) { 105 ieee80211_free_txskb(htt->ar->hw, msdu); 106 return 0; 107 } 108 109 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 110 info->flags |= IEEE80211_TX_STAT_ACK; 111 112 if (tx_done->status == HTT_TX_COMPL_STATE_NOACK) 113 info->flags &= ~IEEE80211_TX_STAT_ACK; 114 115 if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) && 116 (info->flags & IEEE80211_TX_CTL_NO_ACK)) 117 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; 118 119 ieee80211_tx_status(htt->ar->hw, msdu); 120 /* we do not own the msdu anymore */ 121 122 return 0; 123 } 124 125 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id, 126 const u8 *addr) 127 { 128 struct ath10k_peer *peer; 129 130 lockdep_assert_held(&ar->data_lock); 131 132 list_for_each_entry(peer, &ar->peers, list) { 133 if (peer->vdev_id != vdev_id) 134 continue; 135 if (!ether_addr_equal(peer->addr, addr)) 136 continue; 137 138 return peer; 139 } 140 141 return NULL; 142 } 143 144 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) 145 { 146 struct ath10k_peer *peer; 147 148 lockdep_assert_held(&ar->data_lock); 149 150 list_for_each_entry(peer, &ar->peers, list) 151 if (test_bit(peer_id, peer->peer_ids)) 152 return peer; 153 154 return NULL; 155 } 156 157 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id, 158 const u8 *addr, bool expect_mapped) 159 { 160 long time_left; 161 162 time_left = wait_event_timeout(ar->peer_mapping_wq, ({ 163 bool mapped; 164 165 spin_lock_bh(&ar->data_lock); 166 mapped = !!ath10k_peer_find(ar, vdev_id, addr); 167 spin_unlock_bh(&ar->data_lock); 168 169 (mapped == expect_mapped || 170 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)); 171 }), 3 * HZ); 172 173 if (time_left == 0) 174 return -ETIMEDOUT; 175 176 return 0; 177 } 178 179 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr) 180 { 181 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true); 182 } 183 184 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr) 185 { 186 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false); 187 } 188 189 void ath10k_peer_map_event(struct ath10k_htt *htt, 190 struct htt_peer_map_event *ev) 191 { 192 struct ath10k *ar = htt->ar; 193 struct ath10k_peer *peer; 194 195 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 196 ath10k_warn(ar, 197 "received htt peer map event with idx out of bounds: %hu\n", 198 ev->peer_id); 199 return; 200 } 201 202 spin_lock_bh(&ar->data_lock); 203 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); 204 if (!peer) { 205 peer = kzalloc(sizeof(*peer), GFP_ATOMIC); 206 if (!peer) 207 goto exit; 208 209 peer->vdev_id = ev->vdev_id; 210 ether_addr_copy(peer->addr, ev->addr); 211 list_add(&peer->list, &ar->peers); 212 wake_up(&ar->peer_mapping_wq); 213 } 214 215 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n", 216 ev->vdev_id, ev->addr, ev->peer_id); 217 218 WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer)); 219 ar->peer_map[ev->peer_id] = peer; 220 set_bit(ev->peer_id, peer->peer_ids); 221 exit: 222 spin_unlock_bh(&ar->data_lock); 223 } 224 225 void ath10k_peer_unmap_event(struct ath10k_htt *htt, 226 struct htt_peer_unmap_event *ev) 227 { 228 struct ath10k *ar = htt->ar; 229 struct ath10k_peer *peer; 230 231 if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { 232 ath10k_warn(ar, 233 "received htt peer unmap event with idx out of bounds: %hu\n", 234 ev->peer_id); 235 return; 236 } 237 238 spin_lock_bh(&ar->data_lock); 239 peer = ath10k_peer_find_by_id(ar, ev->peer_id); 240 if (!peer) { 241 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n", 242 ev->peer_id); 243 goto exit; 244 } 245 246 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n", 247 peer->vdev_id, peer->addr, ev->peer_id); 248 249 ar->peer_map[ev->peer_id] = NULL; 250 clear_bit(ev->peer_id, peer->peer_ids); 251 252 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) { 253 list_del(&peer->list); 254 kfree(peer); 255 wake_up(&ar->peer_mapping_wq); 256 } 257 258 exit: 259 spin_unlock_bh(&ar->data_lock); 260 } 261