---
drivers/net/wireless/nxp/nxpwifi/txrx.c | 358 ++++++++++++++++++++++++
1 file changed, 358 insertions(+)
create mode 100644 drivers/net/wireless/nxp/nxpwifi/txrx.c
diff --git a/drivers/net/wireless/nxp/nxpwifi/txrx.c b/drivers/net/wireless/nxp/nxpwifi/txrx.c
new file mode 100644
index 000000000000..860c88bf8ea8
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/txrx.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: generic TX/RX data handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "cfg.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+
+/* This function processes the received buffer.
+ *
+ * Main responsibility of this function is to parse the RxPD to
+ * identify the correct interface this packet is headed for and
+ * forwarding it to the associated handling function, where the
+ * packet will be further processed and sent to kernel/upper layer
+ * if required.
+ */
+int nxpwifi_handle_rx_packet(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_private *priv =
+ nxpwifi_get_priv(adapter, NXPWIFI_BSS_ROLE_ANY);
+ struct rxpd *local_rx_pd;
+ struct nxpwifi_rxinfo *rx_info = NXPWIFI_SKB_RXCB(skb);
+ int ret;
+
+ local_rx_pd = (struct rxpd *)(skb->data);
+ /* Get the BSS number from rxpd, get corresponding priv */
+ priv = nxpwifi_get_priv_by_id(adapter, local_rx_pd->bss_num &
+ BSS_NUM_MASK, local_rx_pd->bss_type);
+ if (!priv)
+ priv = nxpwifi_get_priv(adapter, NXPWIFI_BSS_ROLE_ANY);
+
+ if (!priv) {
+ nxpwifi_dbg(adapter, ERROR,
+ "data: priv not found. Drop RX packet\n");
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ nxpwifi_dbg_dump(adapter, DAT_D, "rx pkt:", skb->data,
+ min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
+
+ memset(rx_info, 0, sizeof(*rx_info));
+ rx_info->bss_num = priv->bss_num;
+ rx_info->bss_type = priv->bss_type;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP)
+ ret = nxpwifi_process_uap_rx_packet(priv, skb);
+ else
+ ret = nxpwifi_process_sta_rx_packet(priv, skb);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nxpwifi_handle_rx_packet);
+
+/* This function sends a packet to device.
+ *
+ * It processes the packet to add the TxPD, checks condition and
+ * sends the processed packet to firmware for transmission.
+ *
+ * On successful completion, the function calls the completion callback
+ * and logs the time.
+ */
+int nxpwifi_process_tx(struct nxpwifi_private *priv, struct sk_buff *skb,
+ struct nxpwifi_tx_param *tx_param)
+{
+ int hroom, ret;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct txpd *local_tx_pd = NULL;
+ struct nxpwifi_sta_node *dest_node;
+ struct ethhdr *hdr = (void *)skb->data;
+
+ if (unlikely(!skb->len ||
+ skb_headroom(skb) < NXPWIFI_MIN_DATA_HEADER_LEN)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ hroom = adapter->intf_hdr_len;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP) {
+ dest_node = nxpwifi_get_sta_entry(priv, hdr->h_dest);
+ if (dest_node) {
+ dest_node->stats.tx_bytes += skb->len;
+ dest_node->stats.tx_packets++;
+ }
+
+ nxpwifi_process_uap_txpd(priv, skb);
+ } else {
+ nxpwifi_process_sta_txpd(priv, skb);
+ }
+
+ if ((adapter->data_sent || adapter->tx_lock_flag)) {
+ skb_queue_tail(&adapter->tx_data_q, skb);
+ atomic_inc(&adapter->tx_queued);
+ return 0;
+ }
+
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA)
+ local_tx_pd = (struct txpd *)(skb->data + hroom);
+ ret = adapter->if_ops.host_to_card(adapter,
+ NXPWIFI_TYPE_DATA,
+ skb, tx_param);
+ nxpwifi_dbg_dump(adapter, DAT_D, "tx pkt:", skb->data,
+ min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
+
+out:
+ switch (ret) {
+ case -ENOSR:
+ nxpwifi_dbg(adapter, DATA, "data: -ENOSR is returned\n");
+ break;
+ case -EBUSY:
+ if ((GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) &&
+ adapter->pps_uapsd_mode && adapter->tx_lock_flag) {
+ priv->adapter->tx_lock_flag = false;
+ if (local_tx_pd)
+ local_tx_pd->flags = 0;
+ }
+ nxpwifi_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
+ break;
+ case -EINPROGRESS:
+ break;
+ case -EINVAL:
+ nxpwifi_dbg(adapter, ERROR,
+ "malformed skb (length: %u, headroom: %u)\n",
+ skb->len, skb_headroom(skb));
+ fallthrough;
+ case 0:
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR,
+ "nxpwifi_write_data_async failed: 0x%X\n",
+ ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ }
+
+ return ret;
+}
+
+static int nxpwifi_host_to_card(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb,
+ struct nxpwifi_tx_param *tx_param)
+{
+ struct txpd *local_tx_pd = NULL;
+ u8 *head_ptr = skb->data;
+ int ret = 0;
+ struct nxpwifi_private *priv;
+ struct nxpwifi_txinfo *tx_info;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ priv = nxpwifi_get_priv_by_id(adapter, tx_info->bss_num,
+ tx_info->bss_type);
+ if (!priv) {
+ nxpwifi_dbg(adapter, ERROR,
+ "data: priv not found. Drop TX packet\n");
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, 0);
+ return ret;
+ }
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA)
+ local_tx_pd = (struct txpd *)(head_ptr + adapter->intf_hdr_len);
+
+ ret = adapter->if_ops.host_to_card(adapter,
+ NXPWIFI_TYPE_DATA,
+ skb, tx_param);
+
+ switch (ret) {
+ case -ENOSR:
+ nxpwifi_dbg(adapter, ERROR, "data: -ENOSR is returned\n");
+ break;
+ case -EBUSY:
+ if ((GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) &&
+ adapter->pps_uapsd_mode &&
+ adapter->tx_lock_flag) {
+ priv->adapter->tx_lock_flag = false;
+ if (local_tx_pd)
+ local_tx_pd->flags = 0;
+ }
+ skb_queue_head(&adapter->tx_data_q, skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ atomic_add(tx_info->aggr_num, &adapter->tx_queued);
+ else
+ atomic_inc(&adapter->tx_queued);
+ nxpwifi_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
+ break;
+ case -EINPROGRESS:
+ break;
+ case 0:
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR,
+ "nxpwifi_write_data_async failed: 0x%X\n", ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ }
+ return ret;
+}
+
+static int
+nxpwifi_dequeue_tx_queue(struct nxpwifi_adapter *adapter)
+{
+ struct sk_buff *skb, *skb_next;
+ struct nxpwifi_txinfo *tx_info;
+ struct nxpwifi_tx_param tx_param;
+
+ skb = skb_dequeue(&adapter->tx_data_q);
+ if (!skb)
+ return -ENOMEM;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ atomic_sub(tx_info->aggr_num, &adapter->tx_queued);
+ else
+ atomic_dec(&adapter->tx_queued);
+
+ if (!skb_queue_empty(&adapter->tx_data_q))
+ skb_next = skb_peek(&adapter->tx_data_q);
+ else
+ skb_next = NULL;
+ tx_param.next_pkt_len = ((skb_next) ? skb_next->len : 0);
+ if (!tx_param.next_pkt_len) {
+ if (!nxpwifi_wmm_lists_empty(adapter))
+ tx_param.next_pkt_len = 1;
+ }
+ return nxpwifi_host_to_card(adapter, skb, &tx_param);
+}
+
+void
+nxpwifi_process_tx_queue(struct nxpwifi_adapter *adapter)
+{
+ do {
+ if (adapter->data_sent || adapter->tx_lock_flag)
+ break;
+ if (nxpwifi_dequeue_tx_queue(adapter))
+ break;
+ } while (!skb_queue_empty(&adapter->tx_data_q));
+}
+
+/* Packet send completion callback handler.
+ *
+ * It either frees the buffer directly or forwards it to another
+ * completion callback which checks conditions, updates statistics,
+ * wakes up stalled traffic queue if required, and then frees the buffer.
+ */
+int nxpwifi_write_data_complete(struct nxpwifi_adapter *adapter,
+ struct sk_buff *skb, int aggr, int status)
+{
+ struct nxpwifi_private *priv;
+ struct nxpwifi_txinfo *tx_info;
+ struct netdev_queue *txq;
+ int index;
+
+ if (!skb)
+ return 0;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ priv = nxpwifi_get_priv_by_id(adapter, tx_info->bss_num,
+ tx_info->bss_type);
+ if (!priv)
+ goto done;
+
+ nxpwifi_set_trans_start(priv->netdev);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_BRIDGED_PKT)
+ atomic_dec_return(&adapter->pending_bridged_pkts);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_AGGR_PKT)
+ goto done;
+
+ if (!status) {
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += tx_info->pkt_len;
+ if (priv->tx_timeout_cnt)
+ priv->tx_timeout_cnt = 0;
+ } else {
+ priv->stats.tx_errors++;
+ }
+
+ if (aggr)
+ /* For skb_aggr, do not wake up tx queue */
+ goto done;
+
+ atomic_dec(&adapter->tx_pending);
+
+ index = nxpwifi_1d_to_wmm_queue[skb->priority];
+ if (atomic_dec_return(&priv->wmm_tx_pending[index]) < LOW_TX_PENDING) {
+ txq = netdev_get_tx_queue(priv->netdev, index);
+ if (netif_tx_queue_stopped(txq)) {
+ netif_tx_wake_queue(txq);
+ nxpwifi_dbg(adapter, DATA, "wake queue: %d\n", index);
+ }
+ }
+done:
+ dev_kfree_skb_any(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nxpwifi_write_data_complete);
+
+void nxpwifi_parse_tx_status_event(struct nxpwifi_private *priv,
+ void *event_body)
+{
+ struct tx_status_event *tx_status = (void *)priv->adapter->event_body;
+ struct sk_buff *ack_skb;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (!tx_status->tx_token_id)
+ return;
+
+ spin_lock_bh(&priv->ack_status_lock);
+ ack_skb = idr_remove(&priv->ack_status_frames, tx_status->tx_token_id);
+ spin_unlock_bh(&priv->ack_status_lock);
+
+ if (ack_skb) {
+ tx_info = NXPWIFI_SKB_TXCB(ack_skb);
+
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_EAPOL_TX_STATUS) {
+ /* consumes ack_skb */
+ skb_complete_wifi_ack(ack_skb, !tx_status->status);
+ } else {
+ /* Remove broadcast address which was added by driver */
+ memmove(ack_skb->data +
+ sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16),
+ ack_skb->data +
+ sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
+ ETH_ALEN, ack_skb->len -
+ (sizeof(struct ieee80211_hdr_3addr) +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
+ ETH_ALEN));
+ ack_skb->len = ack_skb->len - ETH_ALEN;
+ /* Remove driver's proprietary header including 2 bytes
+ * of packet length and pass actual management frame buffer
+ * to cfg80211.
+ */
+ cfg80211_mgmt_tx_status(&priv->wdev, tx_info->cookie,
+ ack_skb->data +
+ NXPWIFI_MGMT_FRAME_HEADER_SIZE +
+ sizeof(u16), ack_skb->len -
+ (NXPWIFI_MGMT_FRAME_HEADER_SIZE
+ + sizeof(u16)),
+ !tx_status->status, GFP_ATOMIC);
+ dev_kfree_skb_any(ack_skb);
+ }
+ }
+}
--
2.34.1
