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