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 %p\n", skb); 48 out: 49 spin_unlock_bh(&ar->data_lock); 50 } 51 52 void 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 ath10k_skb_cb *skb_cb; 59 struct sk_buff *msdu; 60 bool limit_mgmt_desc = false; 61 62 ath10k_dbg(ar, ATH10K_DBG_HTT, 63 "htt tx completion msdu_id %u discard %d no_ack %d success %d\n", 64 tx_done->msdu_id, !!tx_done->discard, 65 !!tx_done->no_ack, !!tx_done->success); 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; 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; 80 } 81 82 skb_cb = ATH10K_SKB_CB(msdu); 83 84 if (unlikely(skb_cb->flags & ATH10K_SKB_F_MGMT) && 85 ar->hw_params.max_probe_resp_desc_thres) 86 limit_mgmt_desc = true; 87 88 ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id); 89 __ath10k_htt_tx_dec_pending(htt, limit_mgmt_desc); 90 if (htt->num_pending_tx == 0) 91 wake_up(&htt->empty_tx_wq); 92 spin_unlock_bh(&htt->tx_lock); 93 94 dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE); 95 96 ath10k_report_offchan_tx(htt->ar, msdu); 97 98 info = IEEE80211_SKB_CB(msdu); 99 memset(&info->status, 0, sizeof(info->status)); 100 trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); 101 102 if (tx_done->discard) { 103 ieee80211_free_txskb(htt->ar->hw, msdu); 104 return; 105 } 106 107 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 108 info->flags |= IEEE80211_TX_STAT_ACK; 109 110 if (tx_done->no_ack) 111 info->flags &= ~IEEE80211_TX_STAT_ACK; 112 113 if (tx_done->success && (info->flags & IEEE80211_TX_CTL_NO_ACK)) 114 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; 115 116 ieee80211_tx_status(htt->ar->hw, msdu); 117 /* we do not own the msdu anymore */ 118 } 119 120 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id, 121 const u8 *addr) 122 { 123 struct ath10k_peer *peer; 124 125 lockdep_assert_held(&ar->data_lock); 126 127 list_for_each_entry(peer, &ar->peers, list) { 128 if (peer->vdev_id != vdev_id) 129 continue; 130 if (memcmp(peer->addr, addr, ETH_ALEN)) 131 continue; 132 133 return peer; 134 } 135 136 return NULL; 137 } 138 139 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) 140 { 141 struct ath10k_peer *peer; 142 143 lockdep_assert_held(&ar->data_lock); 144 145 list_for_each_entry(peer, &ar->peers, list) 146 if (test_bit(peer_id, peer->peer_ids)) 147 return peer; 148 149 return NULL; 150 } 151 152 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id, 153 const u8 *addr, bool expect_mapped) 154 { 155 long time_left; 156 157 time_left = wait_event_timeout(ar->peer_mapping_wq, ({ 158 bool mapped; 159 160 spin_lock_bh(&ar->data_lock); 161 mapped = !!ath10k_peer_find(ar, vdev_id, addr); 162 spin_unlock_bh(&ar->data_lock); 163 164 (mapped == expect_mapped || 165 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)); 166 }), 3*HZ); 167 168 if (time_left == 0) 169 return -ETIMEDOUT; 170 171 return 0; 172 } 173 174 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr) 175 { 176 return ath10k_wait_for_peer_common(ar, vdev_id, addr, true); 177 } 178 179 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr) 180 { 181 return ath10k_wait_for_peer_common(ar, vdev_id, addr, false); 182 } 183 184 void ath10k_peer_map_event(struct ath10k_htt *htt, 185 struct htt_peer_map_event *ev) 186 { 187 struct ath10k *ar = htt->ar; 188 struct ath10k_peer *peer; 189 190 spin_lock_bh(&ar->data_lock); 191 peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); 192 if (!peer) { 193 peer = kzalloc(sizeof(*peer), GFP_ATOMIC); 194 if (!peer) 195 goto exit; 196 197 peer->vdev_id = ev->vdev_id; 198 ether_addr_copy(peer->addr, ev->addr); 199 list_add(&peer->list, &ar->peers); 200 wake_up(&ar->peer_mapping_wq); 201 } 202 203 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n", 204 ev->vdev_id, ev->addr, ev->peer_id); 205 206 set_bit(ev->peer_id, peer->peer_ids); 207 exit: 208 spin_unlock_bh(&ar->data_lock); 209 } 210 211 void ath10k_peer_unmap_event(struct ath10k_htt *htt, 212 struct htt_peer_unmap_event *ev) 213 { 214 struct ath10k *ar = htt->ar; 215 struct ath10k_peer *peer; 216 217 spin_lock_bh(&ar->data_lock); 218 peer = ath10k_peer_find_by_id(ar, ev->peer_id); 219 if (!peer) { 220 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n", 221 ev->peer_id); 222 goto exit; 223 } 224 225 ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n", 226 peer->vdev_id, peer->addr, ev->peer_id); 227 228 clear_bit(ev->peer_id, peer->peer_ids); 229 230 if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) { 231 list_del(&peer->list); 232 kfree(peer); 233 wake_up(&ar->peer_mapping_wq); 234 } 235 236 exit: 237 spin_unlock_bh(&ar->data_lock); 238 } 239