drivers/net/wireless/ath/ath10k/txrx.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2005-2011 Atheros Communications Inc.
   4  * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
   5  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
   6  */
   7
   8 #include "core.h"
   9 #include "txrx.h"
  10 #include "htt.h"
  11 #include "mac.h"
  12 #include "debug.h"
  13
  14 static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
  15 {
  16         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  17
  18         if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
  19                 return;
  20
  21         if (ath10k_mac_tx_frm_has_freq(ar))
  22                 return;
  23
  24         /* If the original wait_for_completion() timed out before
  25          * {data,mgmt}_tx_completed() was called then we could complete
  26          * offchan_tx_completed for a different skb. Prevent this by using
  27          * offchan_tx_skb.
  28          */
  29         spin_lock_bh(&ar->data_lock);
  30         if (ar->offchan_tx_skb != skb) {
  31                 ath10k_warn(ar, "completed old offchannel frame\n");
  32                 goto out;
  33         }
  34
  35         complete(&ar->offchan_tx_completed);
  36         ar->offchan_tx_skb = NULL; /* just for sanity */
  37
  38         ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
  39 out:
  40         spin_unlock_bh(&ar->data_lock);
  41 }
  42
  43 int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
  44                          const struct htt_tx_done *tx_done)
  45 {
  46         struct ath10k *ar = htt->ar;
  47         struct device *dev = ar->dev;
  48         struct ieee80211_tx_info *info;
  49         struct ieee80211_txq *txq;
  50         struct ath10k_skb_cb *skb_cb;
  51         struct ath10k_txq *artxq;
  52         struct sk_buff *msdu;
  53         u8 flags;
  54
  55         ath10k_dbg(ar, ATH10K_DBG_HTT,
  56                    "htt tx completion msdu_id %u status %d\n",
  57                    tx_done->msdu_id, tx_done->status);
  58
  59         if (tx_done->msdu_id >= htt->max_num_pending_tx) {
  60                 ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
  61                             tx_done->msdu_id);
  62                 return -EINVAL;
  63         }
  64
  65         spin_lock_bh(&htt->tx_lock);
  66         msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
  67         if (!msdu) {
  68                 ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
  69                             tx_done->msdu_id);
  70                 spin_unlock_bh(&htt->tx_lock);
  71                 return -ENOENT;
  72         }
  73
  74         skb_cb = ATH10K_SKB_CB(msdu);
  75         txq = skb_cb->txq;
  76
  77         if (txq) {
  78                 artxq = (void *)txq->drv_priv;
  79                 artxq->num_fw_queued--;
  80         }
  81
  82         flags = skb_cb->flags;
  83         ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
  84         ath10k_htt_tx_dec_pending(htt);
  85         if (htt->num_pending_tx == 0)
  86                 wake_up(&htt->empty_tx_wq);
  87         spin_unlock_bh(&htt->tx_lock);
  88
  89         rcu_read_lock();
  90         if (txq && txq->sta && skb_cb->airtime_est)
  91                 ieee80211_sta_register_airtime(txq->sta, txq->tid,
  92                                                skb_cb->airtime_est, 0);
  93         rcu_read_unlock();
  94
  95         if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
  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         info->status.rates[0].idx = -1;
 103
 104         trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
 105
 106         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 107             !(flags & ATH10K_SKB_F_NOACK_TID))
 108                 info->flags |= IEEE80211_TX_STAT_ACK;
 109
 110         if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
 111                 info->flags &= ~IEEE80211_TX_STAT_ACK;
 112
 113         if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
 114             ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 115             (flags & ATH10K_SKB_F_NOACK_TID)))
 116                 info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 117
 118         if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
 119                 if ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
 120                     (flags & ATH10K_SKB_F_NOACK_TID))
 121                         info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 122                 else
 123                         info->flags &= ~IEEE80211_TX_STAT_ACK;
 124         }
 125
 126         if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
 127             tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
 128                 info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
 129                                                 tx_done->ack_rssi;
 130                 info->status.is_valid_ack_signal = true;
 131         }
 132
 133         ieee80211_tx_status(htt->ar->hw, msdu);
 134         /* we do not own the msdu anymore */
 135
 136         return 0;
 137 }
 138
 139 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
 140                                      const u8 *addr)
 141 {
 142         struct ath10k_peer *peer;
 143
 144         lockdep_assert_held(&ar->data_lock);
 145
 146         list_for_each_entry(peer, &ar->peers, list) {
 147                 if (peer->vdev_id != vdev_id)
 148                         continue;
 149                 if (!ether_addr_equal(peer->addr, addr))
 150                         continue;
 151
 152                 return peer;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
 159 {
 160         struct ath10k_peer *peer;
 161
 162         if (peer_id >= BITS_PER_TYPE(peer->peer_ids))
 163                 return NULL;
 164
 165         lockdep_assert_held(&ar->data_lock);
 166
 167         list_for_each_entry(peer, &ar->peers, list)
 168                 if (test_bit(peer_id, peer->peer_ids))
 169                         return peer;
 170
 171         return NULL;
 172 }
 173
 174 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
 175                                        const u8 *addr, bool expect_mapped)
 176 {
 177         long time_left;
 178
 179         time_left = wait_event_timeout(ar->peer_mapping_wq, ({
 180                         bool mapped;
 181
 182                         spin_lock_bh(&ar->data_lock);
 183                         mapped = !!ath10k_peer_find(ar, vdev_id, addr);
 184                         spin_unlock_bh(&ar->data_lock);
 185
 186                         (mapped == expect_mapped ||
 187                          test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
 188                 }), 3 * HZ);
 189
 190         if (time_left == 0)
 191                 return -ETIMEDOUT;
 192
 193         return 0;
 194 }
 195
 196 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
 197 {
 198         return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
 199 }
 200
 201 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
 202 {
 203         return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
 204 }
 205
 206 void ath10k_peer_map_event(struct ath10k_htt *htt,
 207                            struct htt_peer_map_event *ev)
 208 {
 209         struct ath10k *ar = htt->ar;
 210         struct ath10k_peer *peer;
 211
 212         if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
 213                 ath10k_warn(ar,
 214                             "received htt peer map event with idx out of bounds: %hu\n",
 215                             ev->peer_id);
 216                 return;
 217         }
 218
 219         spin_lock_bh(&ar->data_lock);
 220         peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
 221         if (!peer) {
 222                 peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
 223                 if (!peer)
 224                         goto exit;
 225
 226                 peer->vdev_id = ev->vdev_id;
 227                 ether_addr_copy(peer->addr, ev->addr);
 228                 list_add(&peer->list, &ar->peers);
 229                 wake_up(&ar->peer_mapping_wq);
 230         }
 231
 232         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
 233                    ev->vdev_id, ev->addr, ev->peer_id);
 234
 235         WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
 236         ar->peer_map[ev->peer_id] = peer;
 237         set_bit(ev->peer_id, peer->peer_ids);
 238 exit:
 239         spin_unlock_bh(&ar->data_lock);
 240 }
 241
 242 void ath10k_peer_unmap_event(struct ath10k_htt *htt,
 243                              struct htt_peer_unmap_event *ev)
 244 {
 245         struct ath10k *ar = htt->ar;
 246         struct ath10k_peer *peer;
 247
 248         if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
 249                 ath10k_warn(ar,
 250                             "received htt peer unmap event with idx out of bounds: %hu\n",
 251                             ev->peer_id);
 252                 return;
 253         }
 254
 255         spin_lock_bh(&ar->data_lock);
 256         peer = ath10k_peer_find_by_id(ar, ev->peer_id);
 257         if (!peer) {
 258                 ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
 259                             ev->peer_id);
 260                 goto exit;
 261         }
 262
 263         ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
 264                    peer->vdev_id, peer->addr, ev->peer_id);
 265
 266         ar->peer_map[ev->peer_id] = NULL;
 267         clear_bit(ev->peer_id, peer->peer_ids);
 268
 269         if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
 270                 list_del(&peer->list);
 271                 kfree(peer);
 272                 wake_up(&ar->peer_mapping_wq);
 273         }
 274
 275 exit:
 276         spin_unlock_bh(&ar->data_lock);
 277 }