1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
new file mode 100644
index 000000000..888a8f4af
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2005-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "core.h"
+#include "txrx.h"
+#include "htt.h"
+#include "mac.h"
+#include "debug.h"
+
+static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+
+	if (likely(!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)))
+		return;
+
+	if (ath10k_mac_tx_frm_has_freq(ar))
+		return;
+
+	/* If the original wait_for_completion() timed out before
+	 * {data,mgmt}_tx_completed() was called then we could complete
+	 * offchan_tx_completed for a different skb. Prevent this by using
+	 * offchan_tx_skb.
+	 */
+	spin_lock_bh(&ar->data_lock);
+	if (ar->offchan_tx_skb != skb) {
+		ath10k_warn(ar, "completed old offchannel frame\n");
+		goto out;
+	}
+
+	complete(&ar->offchan_tx_completed);
+	ar->offchan_tx_skb = NULL; /* just for sanity */
+
+	ath10k_dbg(ar, ATH10K_DBG_HTT, "completed offchannel skb %pK\n", skb);
+out:
+	spin_unlock_bh(&ar->data_lock);
+}
+
+int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
+			 const struct htt_tx_done *tx_done)
+{
+	struct ath10k *ar = htt->ar;
+	struct device *dev = ar->dev;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_txq *txq;
+	struct ath10k_skb_cb *skb_cb;
+	struct ath10k_txq *artxq;
+	struct sk_buff *msdu;
+
+	ath10k_dbg(ar, ATH10K_DBG_HTT,
+		   "htt tx completion msdu_id %u status %d\n",
+		   tx_done->msdu_id, tx_done->status);
+
+	if (tx_done->msdu_id >= htt->max_num_pending_tx) {
+		ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n",
+			    tx_done->msdu_id);
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&htt->tx_lock);
+	msdu = idr_find(&htt->pending_tx, tx_done->msdu_id);
+	if (!msdu) {
+		ath10k_warn(ar, "received tx completion for invalid msdu_id: %d\n",
+			    tx_done->msdu_id);
+		spin_unlock_bh(&htt->tx_lock);
+		return -ENOENT;
+	}
+
+	skb_cb = ATH10K_SKB_CB(msdu);
+	txq = skb_cb->txq;
+
+	if (txq) {
+		artxq = (void *)txq->drv_priv;
+		artxq->num_fw_queued--;
+	}
+
+	ath10k_htt_tx_free_msdu_id(htt, tx_done->msdu_id);
+	ath10k_htt_tx_dec_pending(htt);
+	spin_unlock_bh(&htt->tx_lock);
+
+	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
+
+	ath10k_report_offchan_tx(htt->ar, msdu);
+
+	info = IEEE80211_SKB_CB(msdu);
+	memset(&info->status, 0, sizeof(info->status));
+	info->status.rates[0].idx = -1;
+
+	trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id);
+
+	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
+		info->flags |= IEEE80211_TX_STAT_ACK;
+
+	if (tx_done->status == HTT_TX_COMPL_STATE_NOACK)
+		info->flags &= ~IEEE80211_TX_STAT_ACK;
+
+	if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) &&
+	    (info->flags & IEEE80211_TX_CTL_NO_ACK))
+		info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+
+	if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) {
+		if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+			info->flags &= ~IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+		else
+			info->flags &= ~IEEE80211_TX_STAT_ACK;
+	}
+
+	if (tx_done->status == HTT_TX_COMPL_STATE_ACK &&
+	    tx_done->ack_rssi != ATH10K_INVALID_RSSI) {
+		info->status.ack_signal = ATH10K_DEFAULT_NOISE_FLOOR +
+						tx_done->ack_rssi;
+		info->status.is_valid_ack_signal = true;
+	}
+
+	ieee80211_tx_status(htt->ar->hw, msdu);
+	/* we do not own the msdu anymore */
+
+	return 0;
+}
+
+struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
+				     const u8 *addr)
+{
+	struct ath10k_peer *peer;
+
+	lockdep_assert_held(&ar->data_lock);
+
+	list_for_each_entry(peer, &ar->peers, list) {
+		if (peer->vdev_id != vdev_id)
+			continue;
+		if (!ether_addr_equal(peer->addr, addr))
+			continue;
+
+		return peer;
+	}
+
+	return NULL;
+}
+
+struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id)
+{
+	struct ath10k_peer *peer;
+
+	if (peer_id >= BITS_PER_TYPE(peer->peer_ids))
+		return NULL;
+
+	lockdep_assert_held(&ar->data_lock);
+
+	list_for_each_entry(peer, &ar->peers, list)
+		if (test_bit(peer_id, peer->peer_ids))
+			return peer;
+
+	return NULL;
+}
+
+static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
+				       const u8 *addr, bool expect_mapped)
+{
+	long time_left;
+
+	time_left = wait_event_timeout(ar->peer_mapping_wq, ({
+			bool mapped;
+
+			spin_lock_bh(&ar->data_lock);
+			mapped = !!ath10k_peer_find(ar, vdev_id, addr);
+			spin_unlock_bh(&ar->data_lock);
+
+			(mapped == expect_mapped ||
+			 test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags));
+		}), 3 * HZ);
+
+	if (time_left == 0)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
+{
+	return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
+}
+
+int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
+{
+	return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
+}
+
+void ath10k_peer_map_event(struct ath10k_htt *htt,
+			   struct htt_peer_map_event *ev)
+{
+	struct ath10k *ar = htt->ar;
+	struct ath10k_peer *peer;
+
+	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
+		ath10k_warn(ar,
+			    "received htt peer map event with idx out of bounds: %hu\n",
+			    ev->peer_id);
+		return;
+	}
+
+	spin_lock_bh(&ar->data_lock);
+	peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
+	if (!peer) {
+		peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
+		if (!peer)
+			goto exit;
+
+		peer->vdev_id = ev->vdev_id;
+		ether_addr_copy(peer->addr, ev->addr);
+		list_add(&peer->list, &ar->peers);
+		wake_up(&ar->peer_mapping_wq);
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
+		   ev->vdev_id, ev->addr, ev->peer_id);
+
+	WARN_ON(ar->peer_map[ev->peer_id] && (ar->peer_map[ev->peer_id] != peer));
+	ar->peer_map[ev->peer_id] = peer;
+	set_bit(ev->peer_id, peer->peer_ids);
+exit:
+	spin_unlock_bh(&ar->data_lock);
+}
+
+void ath10k_peer_unmap_event(struct ath10k_htt *htt,
+			     struct htt_peer_unmap_event *ev)
+{
+	struct ath10k *ar = htt->ar;
+	struct ath10k_peer *peer;
+
+	if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) {
+		ath10k_warn(ar,
+			    "received htt peer unmap event with idx out of bounds: %hu\n",
+			    ev->peer_id);
+		return;
+	}
+
+	spin_lock_bh(&ar->data_lock);
+	peer = ath10k_peer_find_by_id(ar, ev->peer_id);
+	if (!peer) {
+		ath10k_warn(ar, "peer-unmap-event: unknown peer id %d\n",
+			    ev->peer_id);
+		goto exit;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
+		   peer->vdev_id, peer->addr, ev->peer_id);
+
+	ar->peer_map[ev->peer_id] = NULL;
+	clear_bit(ev->peer_id, peer->peer_ids);
+
+	if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
+		list_del(&peer->list);
+		kfree(peer);
+		wake_up(&ar->peer_mapping_wq);
+	}
+
+exit:
+	spin_unlock_bh(&ar->data_lock);
+}