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