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 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 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 56 ath10k_dbg(ar, ATH10K_DBG_HTT, 57 "htt tx completion msdu_id %u discard %d no_ack %d success %d\n", 58 tx_done->msdu_id, !!tx_done->discard, 59 !!tx_done->no_ack, !!tx_done->success); 60 61 if (tx_done->msdu_id >= htt->max_num_pending_tx) { 62 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n", 63 tx_done->msdu_id); 64 return; 65 } 66 67 spin_lock_bh(&htt->tx_lock); 68 msdu = idr_find(&htt->pending_tx, tx_done->msdu_id); 69 if (!msdu) { 70 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n", 71 tx_done->msdu_id); 72 spin_unlock_bh(&htt->tx_lock); 73 return; 74 } 75 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); 76 __ath10k_htt_tx_dec_pending(htt); 77 if (htt->num_pending_tx == 0) 78 wake_up(&htt->empty_tx_wq); 79 spin_unlock_bh(&htt->tx_lock); 80 81 skb_cb = ATH10K_SKB_CB(msdu); 82 83 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE); 84 85 if (skb_cb->htt.txbuf) 86 dma_pool_free(htt->tx_pool, 87 skb_cb->htt.txbuf, 88 skb_cb->htt.txbuf_paddr); 89 90 ath10k_report_offchan_tx(htt->ar, msdu); 91 92 info = IEEE80211_SKB_CB(msdu); 93 memset(&info->status, 0, sizeof(info->status)); 94 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); 95 96 if (tx_done->discard) { 97 ieee80211_free_txskb(htt->ar->hw, msdu); 98 return; 99 } 100 101 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 102 info->flags |= IEEE80211_TX_STAT_ACK; 103 104 if (tx_done->no_ack) 105 info->flags &= ~IEEE80211_TX_STAT_ACK; 106 107 if (tx_done->success && (info->flags & IEEE80211_TX_CTL_NO_ACK)) 108 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; 109 110 ieee80211_tx_status(htt->ar->hw, msdu); 111 /* we do not own the msdu anymore */ 112 } 113 114 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id, 115 const u8 *addr) 116 { 117 struct ath10k_peer *peer; 118 119 lockdep_assert_held(&ar->data_lock); 120 121 list_for_each_entry(peer, &ar->peers, list) { 122 if (peer->vdev_id != vdev_id) 123 continue; 124 if (memcmp(peer->addr, addr, ETH_ALEN)) 125 continue; 126 127 return peer; 128 } 129 130 return NULL; 131 } 132 133 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) 134 { 135 struct ath10k_peer *peer; 136 137 lockdep_assert_held(&ar->data_lock); 138 139 list_for_each_entry(peer, &ar->peers, list) 140 if (test_bit(peer_id, peer->peer_ids)) 141 return peer; 142 143 return NULL; 144 } 145 146 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id, 147 const u8 *addr, bool expect_mapped) 148 { 149 long time_left; 150 151 time_left = wait_event_timeout(ar->peer_mapping_wq, ({ 152 bool mapped; 153 154 spin_lock_bh(&ar->data_lock); 155 mapped = !!ath10k_peer_find(ar, vdev_id, addr); 156 spin_unlock_bh(&ar->data_lock); 157 158 (mapped == expect_mapped || 159 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)); 160 }), 3*HZ); 161 162 if (time_left == 0) 163 return -ETIMEDOUT; 164 165 return 0; 166 } 167 168 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr) 169 { 170 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true); 171 } 172 173 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr) 174 { 175 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false); 176 } 177 178 void ath10k_peer_map_event(struct ath10k_htt *htt, 179 struct htt_peer_map_event *ev) 180 { 181 struct ath10k *ar = htt->ar; 182 struct ath10k_peer *peer; 183 184 spin_lock_bh(&ar->data_lock); 185 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); 186 if (!peer) { 187 peer = kzalloc(sizeof(*peer), GFP_ATOMIC); 188 if (!peer) 189 goto exit; 190 191 peer->vdev_id = ev->vdev_id; 192 ether_addr_copy(peer->addr, ev->addr); 193 list_add(&peer->list, &ar->peers); 194 wake_up(&ar->peer_mapping_wq); 195 } 196 197 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n", 198 ev->vdev_id, ev->addr, ev->peer_id); 199 200 set_bit(ev->peer_id, peer->peer_ids); 201 exit: 202 spin_unlock_bh(&ar->data_lock); 203 } 204 205 void ath10k_peer_unmap_event(struct ath10k_htt *htt, 206 struct htt_peer_unmap_event *ev) 207 { 208 struct ath10k *ar = htt->ar; 209 struct ath10k_peer *peer; 210 211 spin_lock_bh(&ar->data_lock); 212 peer = ath10k_peer_find_by_id(ar, ev->peer_id); 213 if (!peer) { 214 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n", 215 ev->peer_id); 216 goto exit; 217 } 218 219 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n", 220 peer->vdev_id, peer->addr, ev->peer_id); 221 222 clear_bit(ev->peer_id, peer->peer_ids); 223 224 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) { 225 list_del(&peer->list); 226 kfree(peer); 227 wake_up(&ar->peer_mapping_wq); 228 } 229 230 exit: 231 spin_unlock_bh(&ar->data_lock); 232 } 233