262 lines
6.7 KiB
C
262 lines
6.7 KiB
C
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/*
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* Copyright (c) 2005-2011 Atheros Communications Inc.
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* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "core.h"
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#include "txrx.h"
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#include "htt.h"
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#include "mac.h"
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#include "debug.h"
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static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
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return;
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if (ath10k_mac_tx_frm_has_freq(ar))
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return;
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/* If the original wait_for_completion() timed out before
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* {data,mgmt}_tx_completed() was called then we could complete
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* offchan_tx_completed for a different skb. Prevent this by using
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* offchan_tx_skb.
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*/
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spin_lock_bh(&ar->data_lock);
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if (ar->offchan_tx_skb != skb) {
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ath10k_warn(ar, "completed old offchannel frame\n");
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goto out;
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}
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complete(&ar->offchan_tx_completed);
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ar->offchan_tx_skb = NULL; /* just for sanity */
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ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
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out:
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spin_unlock_bh(&ar->data_lock);
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}
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int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
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const struct htt_tx_done *tx_done)
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{
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struct ath10k *ar = htt->ar;
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struct device *dev = ar->dev;
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struct ieee80211_tx_info *info;
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struct ieee80211_txq *txq;
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struct ath10k_skb_cb *skb_cb;
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struct ath10k_txq *artxq;
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struct sk_buff *msdu;
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ath10k_dbg(ar, ATH10K_DBG_HTT,
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"htt tx completion msdu_id %u status %d\n",
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tx_done->msdu_id, tx_done->status);
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if (tx_done->msdu_id >= htt->max_num_pending_tx) {
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ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
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tx_done->msdu_id);
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return -EINVAL;
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}
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spin_lock_bh(&htt->tx_lock);
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msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
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if (!msdu) {
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ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
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tx_done->msdu_id);
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spin_unlock_bh(&htt->tx_lock);
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return -ENOENT;
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}
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skb_cb = ATH10K_SKB_CB(msdu);
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txq = skb_cb->txq;
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if (txq) {
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artxq = (void *)txq->drv_priv;
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artxq->num_fw_queued--;
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}
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ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
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ath10k_htt_tx_dec_pending(htt);
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if (htt->num_pending_tx == 0)
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wake_up(&htt->empty_tx_wq);
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spin_unlock_bh(&htt->tx_lock);
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dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
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ath10k_report_offchan_tx(htt->ar, msdu);
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info = IEEE80211_SKB_CB(msdu);
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memset(&info->status, 0, sizeof(info->status));
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trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
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if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
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ieee80211_free_txskb(htt->ar->hw, msdu);
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return 0;
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}
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if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
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info->flags |= IEEE80211_TX_STAT_ACK;
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if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
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info->flags &= ~IEEE80211_TX_STAT_ACK;
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if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
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(info->flags & IEEE80211_TX_CTL_NO_ACK))
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info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
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ieee80211_tx_status(htt->ar->hw, msdu);
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/* we do not own the msdu anymore */
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return 0;
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}
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struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
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const u8 *addr)
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{
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struct ath10k_peer *peer;
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lockdep_assert_held(&ar->data_lock);
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list_for_each_entry(peer, &ar->peers, list) {
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if (peer->vdev_id != vdev_id)
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continue;
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if (!ether_addr_equal(peer->addr, addr))
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continue;
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return peer;
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}
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return NULL;
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}
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struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
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{
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struct ath10k_peer *peer;
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lockdep_assert_held(&ar->data_lock);
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list_for_each_entry(peer, &ar->peers, list)
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if (test_bit(peer_id, peer->peer_ids))
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return peer;
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return NULL;
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}
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static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
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const u8 *addr, bool expect_mapped)
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{
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long time_left;
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time_left = wait_event_timeout(ar->peer_mapping_wq, ({
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bool mapped;
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spin_lock_bh(&ar->data_lock);
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mapped = !!ath10k_peer_find(ar, vdev_id, addr);
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spin_unlock_bh(&ar->data_lock);
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(mapped == expect_mapped ||
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test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
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}), 3 * HZ);
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if (time_left == 0)
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return -ETIMEDOUT;
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return 0;
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}
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int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
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{
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return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
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}
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int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
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{
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return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
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}
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void ath10k_peer_map_event(struct ath10k_htt *htt,
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struct htt_peer_map_event *ev)
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{
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struct ath10k *ar = htt->ar;
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struct ath10k_peer *peer;
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if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
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ath10k_warn(ar,
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"received htt peer map event with idx out of bounds: %hu\n",
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ev->peer_id);
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return;
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}
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spin_lock_bh(&ar->data_lock);
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peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
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if (!peer) {
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peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
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if (!peer)
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goto exit;
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peer->vdev_id = ev->vdev_id;
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ether_addr_copy(peer->addr, ev->addr);
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list_add(&peer->list, &ar->peers);
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wake_up(&ar->peer_mapping_wq);
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}
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ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
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ev->vdev_id, ev->addr, ev->peer_id);
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WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
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ar->peer_map[ev->peer_id] = peer;
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set_bit(ev->peer_id, peer->peer_ids);
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exit:
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spin_unlock_bh(&ar->data_lock);
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}
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void ath10k_peer_unmap_event(struct ath10k_htt *htt,
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struct htt_peer_unmap_event *ev)
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{
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struct ath10k *ar = htt->ar;
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struct ath10k_peer *peer;
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if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
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ath10k_warn(ar,
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"received htt peer unmap event with idx out of bounds: %hu\n",
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ev->peer_id);
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return;
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}
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spin_lock_bh(&ar->data_lock);
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peer = ath10k_peer_find_by_id(ar, ev->peer_id);
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if (!peer) {
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ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
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ev->peer_id);
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goto exit;
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}
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ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
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peer->vdev_id, peer->addr, ev->peer_id);
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ar->peer_map[ev->peer_id] = NULL;
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clear_bit(ev->peer_id, peer->peer_ids);
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if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
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list_del(&peer->list);
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kfree(peer);
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wake_up(&ar->peer_mapping_wq);
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}
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exit:
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spin_unlock_bh(&ar->data_lock);
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}
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