ath/ath10k/txrx.c

0001 // SPDX-License-Identifier: ISC
0002 /*
0003  * Copyright (c) 2005-2011 Atheros Communications Inc.
0004  * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
0005  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
0006  */
0007
0008 #include "core.h"
0009 #include "txrx.h"
0010 #include "htt.h"
0011 #include "mac.h"
0012 #include "debug.h"
0013
0014 static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
0015 {
0016     struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
0017
0018     if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
0019         return;
0020
0021     if (ath10k_mac_tx_frm_has_freq(ar))
0022         return;
0023
0024     /* If the original wait_for_completion() timed out before
0025      * {data,mgmt}_tx_completed() was called then we could complete
0026      * offchan_tx_completed for a different skb. Prevent this by using
0027      * offchan_tx_skb.
0028      */
0029     spin_lock_bh(&ar->data_lock);
0030     if (ar->offchan_tx_skb != skb) {
0031         ath10k_warn(ar, "completed old offchannel frame\n");
0032         goto out;
0033     }
0034
0035     complete(&ar->offchan_tx_completed);
0036     ar->offchan_tx_skb = NULL; /* just for sanity */
0037
0038     ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
0039 out:
0040     spin_unlock_bh(&ar->data_lock);
0041 }
0042
0043 int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
0044              const struct htt_tx_done *tx_done)
0045 {
0046     struct ieee80211_tx_status status;
0047     struct ath10k *ar = htt->ar;
0048     struct device *dev = ar->dev;
0049     struct ieee80211_tx_info *info;
0050     struct ieee80211_txq *txq;
0051     struct ath10k_skb_cb *skb_cb;
0052     struct ath10k_txq *artxq;
0053     struct sk_buff *msdu;
0054     u8 flags;
0055
0056     ath10k_dbg(ar, ATH10K_DBG_HTT,
0057            "htt tx completion msdu_id %u status %d\n",
0058            tx_done->msdu_id, tx_done->status);
0059
0060     if (tx_done->msdu_id >= htt->max_num_pending_tx) {
0061         ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
0062                 tx_done->msdu_id);
0063         return -EINVAL;
0064     }
0065
0066     spin_lock_bh(&htt->tx_lock);
0067     msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
0068     if (!msdu) {
0069         ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
0070                 tx_done->msdu_id);
0071         spin_unlock_bh(&htt->tx_lock);
0072         return -ENOENT;
0073     }
0074
0075     skb_cb = ATH10K_SKB_CB(msdu);
0076     txq = skb_cb->txq;
0077
0078     if (txq) {
0079         artxq = (void *)txq->drv_priv;
0080         artxq->num_fw_queued--;
0081     }
0082
0083     flags = skb_cb->flags;
0084     ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
0085     ath10k_htt_tx_dec_pending(htt);
0086     spin_unlock_bh(&htt->tx_lock);
0087
0088     rcu_read_lock();
0089     if (txq && txq->sta && skb_cb->airtime_est)
0090         ieee80211_sta_register_airtime(txq->sta, txq->tid,
0091                            skb_cb->airtime_est, 0);
0092     rcu_read_unlock();
0093
0094     if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
0095         dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
0096
0097     ath10k_report_offchan_tx(htt->ar, msdu);
0098
0099     info = IEEE80211_SKB_CB(msdu);
0100     memset(&info->status, 0, sizeof(info->status));
0101     info->status.rates[0].idx = -1;
0102
0103     trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
0104
0105     if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
0106         !(flags & ATH10K_SKB_F_NOACK_TID))
0107         info->flags |= IEEE80211_TX_STAT_ACK;
0108
0109     if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
0110         info->flags &= ~IEEE80211_TX_STAT_ACK;
0111
0112     if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
0113         ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
0114         (flags & ATH10K_SKB_F_NOACK_TID)))
0115         info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
0116
0117     if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
0118         if ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
0119             (flags & ATH10K_SKB_F_NOACK_TID))
0120             info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
0121         else
0122             info->flags &= ~IEEE80211_TX_STAT_ACK;
0123     }
0124
0125     if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
0126         tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
0127         info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
0128                         tx_done->ack_rssi;
0129         info->status.flags |= IEEE80211_TX_STATUS_ACK_SIGNAL_VALID;
0130     }
0131
0132     memset(&status, 0, sizeof(status));
0133     status.skb = msdu;
0134     status.info = info;
0135
0136     rcu_read_lock();
0137
0138     if (txq)
0139         status.sta = txq->sta;
0140
0141     ieee80211_tx_status_ext(htt->ar->hw, &status);
0142
0143     rcu_read_unlock();
0144
0145     /* we do not own the msdu anymore */
0146
0147     return 0;
0148 }
0149
0150 struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
0151                      const u8 *addr)
0152 {
0153     struct ath10k_peer *peer;
0154
0155     lockdep_assert_held(&ar->data_lock);
0156
0157     list_for_each_entry(peer, &ar->peers, list) {
0158         if (peer->vdev_id != vdev_id)
0159             continue;
0160         if (!ether_addr_equal(peer->addr, addr))
0161             continue;
0162
0163         return peer;
0164     }
0165
0166     return NULL;
0167 }
0168
0169 struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
0170 {
0171     struct ath10k_peer *peer;
0172
0173     if (peer_id >= BITS_PER_TYPE(peer->peer_ids))
0174         return NULL;
0175
0176     lockdep_assert_held(&ar->data_lock);
0177
0178     list_for_each_entry(peer, &ar->peers, list)
0179         if (test_bit(peer_id, peer->peer_ids))
0180             return peer;
0181
0182     return NULL;
0183 }
0184
0185 static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
0186                        const u8 *addr, bool expect_mapped)
0187 {
0188     long time_left;
0189
0190     time_left = wait_event_timeout(ar->peer_mapping_wq, ({
0191             bool mapped;
0192
0193             spin_lock_bh(&ar->data_lock);
0194             mapped = !!ath10k_peer_find(ar, vdev_id, addr);
0195             spin_unlock_bh(&ar->data_lock);
0196
0197             (mapped == expect_mapped ||
0198              test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
0199         }), 3 * HZ);
0200
0201     if (time_left == 0)
0202         return -ETIMEDOUT;
0203
0204     return 0;
0205 }
0206
0207 int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
0208 {
0209     return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
0210 }
0211
0212 int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
0213 {
0214     return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
0215 }
0216
0217 void ath10k_peer_map_event(struct ath10k_htt *htt,
0218                struct htt_peer_map_event *ev)
0219 {
0220     struct ath10k *ar = htt->ar;
0221     struct ath10k_peer *peer;
0222
0223     if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
0224         ath10k_warn(ar,
0225                 "received htt peer map event with idx out of bounds: %u\n",
0226                 ev->peer_id);
0227         return;
0228     }
0229
0230     spin_lock_bh(&ar->data_lock);
0231     peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
0232     if (!peer) {
0233         peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
0234         if (!peer)
0235             goto exit;
0236
0237         peer->vdev_id = ev->vdev_id;
0238         ether_addr_copy(peer->addr, ev->addr);
0239         list_add(&peer->list, &ar->peers);
0240         wake_up(&ar->peer_mapping_wq);
0241     }
0242
0243     ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
0244            ev->vdev_id, ev->addr, ev->peer_id);
0245
0246     WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
0247     ar->peer_map[ev->peer_id] = peer;
0248     set_bit(ev->peer_id, peer->peer_ids);
0249 exit:
0250     spin_unlock_bh(&ar->data_lock);
0251 }
0252
0253 void ath10k_peer_unmap_event(struct ath10k_htt *htt,
0254                  struct htt_peer_unmap_event *ev)
0255 {
0256     struct ath10k *ar = htt->ar;
0257     struct ath10k_peer *peer;
0258
0259     if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
0260         ath10k_warn(ar,
0261                 "received htt peer unmap event with idx out of bounds: %u\n",
0262                 ev->peer_id);
0263         return;
0264     }
0265
0266     spin_lock_bh(&ar->data_lock);
0267     peer = ath10k_peer_find_by_id(ar, ev->peer_id);
0268     if (!peer) {
0269         ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
0270                 ev->peer_id);
0271         goto exit;
0272     }
0273
0274     ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
0275            peer->vdev_id, peer->addr, ev->peer_id);
0276
0277     ar->peer_map[ev->peer_id] = NULL;
0278     clear_bit(ev->peer_id, peer->peer_ids);
0279
0280     if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
0281         list_del(&peer->list);
0282         kfree(peer);
0283         wake_up(&ar->peer_mapping_wq);
0284     }
0285
0286 exit:
0287     spin_unlock_bh(&ar->data_lock);
0288 }