381 lines
11 KiB
C
381 lines
11 KiB
C
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/*
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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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mwifiex_dbg(adapter, ERROR,
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"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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mwifiex_dbg_dump(adapter, DAT_D, "rx pkt:", skb->data,
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min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
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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 hroom, 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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struct mwifiex_sta_node *dest_node;
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struct ethhdr *hdr = (void *)skb->data;
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hroom = adapter->intf_hdr_len;
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if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
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dest_node = mwifiex_get_sta_entry(priv, hdr->h_dest);
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if (dest_node) {
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dest_node->stats.tx_bytes += skb->len;
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dest_node->stats.tx_packets++;
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}
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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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}
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if ((adapter->data_sent || adapter->tx_lock_flag) && head_ptr) {
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skb_queue_tail(&adapter->tx_data_q, skb);
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atomic_inc(&adapter->tx_queued);
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return 0;
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}
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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 = (struct txpd *)(head_ptr + hroom);
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if (adapter->iface_type == MWIFIEX_USB) {
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ret = adapter->if_ops.host_to_card(adapter,
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priv->usb_port,
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skb, tx_param);
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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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mwifiex_dbg_dump(adapter, DAT_D, "tx pkt:", skb->data,
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min_t(size_t, skb->len, DEBUG_DUMP_DATA_MAX_LEN));
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switch (ret) {
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case -ENOSR:
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mwifiex_dbg(adapter, DATA, "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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mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
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break;
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case -1:
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mwifiex_dbg(adapter, ERROR,
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"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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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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static int mwifiex_host_to_card(struct mwifiex_adapter *adapter,
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struct sk_buff *skb,
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struct mwifiex_tx_param *tx_param)
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{
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struct txpd *local_tx_pd = NULL;
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u8 *head_ptr = skb->data;
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int ret = 0;
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struct mwifiex_private *priv;
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struct mwifiex_txinfo *tx_info;
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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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mwifiex_dbg(adapter, ERROR,
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"data: priv not found. Drop TX packet\n");
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adapter->dbg.num_tx_host_to_card_failure++;
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mwifiex_write_data_complete(adapter, skb, 0, 0);
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return ret;
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}
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if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
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local_tx_pd = (struct txpd *)(head_ptr + adapter->intf_hdr_len);
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if (adapter->iface_type == MWIFIEX_USB) {
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ret = adapter->if_ops.host_to_card(adapter,
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priv->usb_port,
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skb, tx_param);
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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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switch (ret) {
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case -ENOSR:
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mwifiex_dbg(adapter, ERROR, "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) &&
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(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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skb_queue_head(&adapter->tx_data_q, skb);
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if (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
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atomic_add(tx_info->aggr_num, &adapter->tx_queued);
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else
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atomic_inc(&adapter->tx_queued);
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mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
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break;
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case -1:
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mwifiex_dbg(adapter, ERROR,
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"mwifiex_write_data_async failed: 0x%X\n", 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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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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static int
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mwifiex_dequeue_tx_queue(struct mwifiex_adapter *adapter)
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{
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struct sk_buff *skb, *skb_next;
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struct mwifiex_txinfo *tx_info;
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struct mwifiex_tx_param tx_param;
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skb = skb_dequeue(&adapter->tx_data_q);
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if (!skb)
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return -1;
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tx_info = MWIFIEX_SKB_TXCB(skb);
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if (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
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atomic_sub(tx_info->aggr_num, &adapter->tx_queued);
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else
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atomic_dec(&adapter->tx_queued);
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if (!skb_queue_empty(&adapter->tx_data_q))
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skb_next = skb_peek(&adapter->tx_data_q);
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else
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skb_next = NULL;
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tx_param.next_pkt_len = ((skb_next) ? skb_next->len : 0);
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if (!tx_param.next_pkt_len) {
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if (!mwifiex_wmm_lists_empty(adapter))
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tx_param.next_pkt_len = 1;
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}
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return mwifiex_host_to_card(adapter, skb, &tx_param);
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}
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void
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mwifiex_process_tx_queue(struct mwifiex_adapter *adapter)
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{
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do {
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if (adapter->data_sent || adapter->tx_lock_flag)
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break;
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if (mwifiex_dequeue_tx_queue(adapter))
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break;
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} while (!skb_queue_empty(&adapter->tx_data_q));
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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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mwifiex_set_trans_start(priv->netdev);
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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 (tx_info->flags & MWIFIEX_BUF_FLAG_AGGR_PKT)
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goto done;
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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 (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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mwifiex_dbg(adapter, DATA, "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_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) {
|
||
|
|
/* 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) +
|
||
|
|
MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(u16),
|
||
|
|
ack_skb->data +
|
||
|
|
sizeof(struct ieee80211_hdr_3addr) +
|
||
|
|
MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(u16) +
|
||
|
|
ETH_ALEN, ack_skb->len -
|
||
|
|
(sizeof(struct ieee80211_hdr_3addr) +
|
||
|
|
MWIFIEX_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 +
|
||
|
|
MWIFIEX_MGMT_FRAME_HEADER_SIZE +
|
||
|
|
sizeof(u16), ack_skb->len -
|
||
|
|
(MWIFIEX_MGMT_FRAME_HEADER_SIZE
|
||
|
|
+ sizeof(u16)),
|
||
|
|
!tx_status->status, GFP_ATOMIC);
|
||
|
|
dev_kfree_skb_any(ack_skb);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|