237 lines
6.7 KiB
C
237 lines
6.7 KiB
C
/*
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* Marvell Wireless LAN device driver: generic TX/RX data handling
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*
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* Copyright (C) 2011-2014, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include "decl.h"
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#include "ioctl.h"
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#include "util.h"
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#include "fw.h"
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#include "main.h"
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#include "wmm.h"
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/*
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* This function processes the received buffer.
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*
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* Main responsibility of this function is to parse the RxPD to
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* identify the correct interface this packet is headed for and
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* forwarding it to the associated handling function, where the
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* packet will be further processed and sent to kernel/upper layer
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* if required.
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*/
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int mwifiex_handle_rx_packet(struct mwifiex_adapter *adapter,
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struct sk_buff *skb)
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{
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struct mwifiex_private *priv =
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mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
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struct rxpd *local_rx_pd;
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struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
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int ret;
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local_rx_pd = (struct rxpd *) (skb->data);
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/* Get the BSS number from rxpd, get corresponding priv */
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priv = mwifiex_get_priv_by_id(adapter, local_rx_pd->bss_num &
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BSS_NUM_MASK, local_rx_pd->bss_type);
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if (!priv)
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priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
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if (!priv) {
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dev_err(adapter->dev, "data: priv not found. Drop RX packet\n");
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dev_kfree_skb_any(skb);
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return -1;
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}
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memset(rx_info, 0, sizeof(*rx_info));
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rx_info->bss_num = priv->bss_num;
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rx_info->bss_type = priv->bss_type;
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if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
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ret = mwifiex_process_uap_rx_packet(priv, skb);
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else
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ret = mwifiex_process_sta_rx_packet(priv, skb);
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return ret;
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}
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EXPORT_SYMBOL_GPL(mwifiex_handle_rx_packet);
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/*
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* This function sends a packet to device.
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*
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* It processes the packet to add the TxPD, checks condition and
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* sends the processed packet to firmware for transmission.
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*
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* On successful completion, the function calls the completion callback
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* and logs the time.
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*/
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int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
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struct mwifiex_tx_param *tx_param)
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{
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int ret = -1;
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struct mwifiex_adapter *adapter = priv->adapter;
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u8 *head_ptr;
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struct txpd *local_tx_pd = NULL;
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if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
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head_ptr = mwifiex_process_uap_txpd(priv, skb);
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else
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head_ptr = mwifiex_process_sta_txpd(priv, skb);
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if (head_ptr) {
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if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
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local_tx_pd =
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(struct txpd *) (head_ptr + INTF_HEADER_LEN);
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if (adapter->iface_type == MWIFIEX_USB) {
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adapter->data_sent = true;
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skb_pull(skb, INTF_HEADER_LEN);
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ret = adapter->if_ops.host_to_card(adapter,
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MWIFIEX_USB_EP_DATA,
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skb, NULL);
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} else {
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ret = adapter->if_ops.host_to_card(adapter,
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MWIFIEX_TYPE_DATA,
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skb, tx_param);
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}
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}
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switch (ret) {
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case -ENOSR:
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dev_dbg(adapter->dev, "data: -ENOSR is returned\n");
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break;
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case -EBUSY:
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if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
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(adapter->pps_uapsd_mode) && (adapter->tx_lock_flag)) {
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priv->adapter->tx_lock_flag = false;
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if (local_tx_pd)
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local_tx_pd->flags = 0;
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}
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dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
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break;
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case -1:
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if (adapter->iface_type != MWIFIEX_PCIE)
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adapter->data_sent = false;
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dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
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ret);
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adapter->dbg.num_tx_host_to_card_failure++;
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mwifiex_write_data_complete(adapter, skb, 0, ret);
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break;
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case -EINPROGRESS:
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if (adapter->iface_type != MWIFIEX_PCIE)
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adapter->data_sent = false;
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break;
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case 0:
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mwifiex_write_data_complete(adapter, skb, 0, ret);
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break;
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default:
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break;
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}
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return ret;
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}
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/*
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* Packet send completion callback handler.
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*
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* It either frees the buffer directly or forwards it to another
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* completion callback which checks conditions, updates statistics,
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* wakes up stalled traffic queue if required, and then frees the buffer.
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*/
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int mwifiex_write_data_complete(struct mwifiex_adapter *adapter,
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struct sk_buff *skb, int aggr, int status)
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{
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struct mwifiex_private *priv;
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struct mwifiex_txinfo *tx_info;
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struct netdev_queue *txq;
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int index;
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if (!skb)
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return 0;
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tx_info = MWIFIEX_SKB_TXCB(skb);
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priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
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tx_info->bss_type);
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if (!priv)
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goto done;
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if (adapter->iface_type == MWIFIEX_USB)
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adapter->data_sent = false;
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mwifiex_set_trans_start(priv->netdev);
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if (!status) {
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priv->stats.tx_packets++;
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priv->stats.tx_bytes += tx_info->pkt_len;
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if (priv->tx_timeout_cnt)
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priv->tx_timeout_cnt = 0;
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} else {
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priv->stats.tx_errors++;
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}
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if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT)
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atomic_dec_return(&adapter->pending_bridged_pkts);
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if (aggr)
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/* For skb_aggr, do not wake up tx queue */
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goto done;
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atomic_dec(&adapter->tx_pending);
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index = mwifiex_1d_to_wmm_queue[skb->priority];
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if (atomic_dec_return(&priv->wmm_tx_pending[index]) < LOW_TX_PENDING) {
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txq = netdev_get_tx_queue(priv->netdev, index);
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if (netif_tx_queue_stopped(txq)) {
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netif_tx_wake_queue(txq);
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dev_dbg(adapter->dev, "wake queue: %d\n", index);
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}
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}
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done:
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dev_kfree_skb_any(skb);
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return 0;
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}
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EXPORT_SYMBOL_GPL(mwifiex_write_data_complete);
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void mwifiex_parse_tx_status_event(struct mwifiex_private *priv,
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void *event_body)
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{
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struct tx_status_event *tx_status = (void *)priv->adapter->event_body;
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struct sk_buff *ack_skb;
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unsigned long flags;
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struct mwifiex_txinfo *tx_info;
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if (!tx_status->tx_token_id)
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return;
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spin_lock_irqsave(&priv->ack_status_lock, flags);
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ack_skb = idr_find(&priv->ack_status_frames, tx_status->tx_token_id);
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if (ack_skb)
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idr_remove(&priv->ack_status_frames, tx_status->tx_token_id);
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spin_unlock_irqrestore(&priv->ack_status_lock, flags);
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if (ack_skb) {
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tx_info = MWIFIEX_SKB_TXCB(ack_skb);
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if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS) {
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/* consumes ack_skb */
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skb_complete_wifi_ack(ack_skb, !tx_status->status);
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} else {
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cfg80211_mgmt_tx_status(priv->wdev, tx_info->cookie,
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ack_skb->data, ack_skb->len,
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!tx_status->status, GFP_ATOMIC);
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dev_kfree_skb_any(ack_skb);
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}
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}
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}
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