245 lines
6.9 KiB
C
245 lines
6.9 KiB
C
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/*
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* Marvell Wireless LAN device driver: station TX 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 fills the TxPD for tx packets.
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*
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* The Tx buffer received by this function should already have the
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* header space allocated for TxPD.
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*
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* This function inserts the TxPD in between interface header and actual
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* data and adjusts the buffer pointers accordingly.
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*
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* The following TxPD fields are set by this function, as required -
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* - BSS number
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* - Tx packet length and offset
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* - Priority
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* - Packet delay
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* - Priority specific Tx control
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* - Flags
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*/
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void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
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struct sk_buff *skb)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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struct txpd *local_tx_pd;
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struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
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unsigned int pad;
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u16 pkt_type, pkt_offset;
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int hroom = adapter->intf_hdr_len;
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if (!skb->len) {
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mwifiex_dbg(adapter, ERROR,
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"Tx: bad packet length: %d\n", skb->len);
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tx_info->status_code = -1;
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return skb->data;
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}
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BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);
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pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
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pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)-
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NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
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skb_push(skb, sizeof(*local_tx_pd) + pad);
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local_tx_pd = (struct txpd *) skb->data;
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memset(local_tx_pd, 0, sizeof(struct txpd));
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local_tx_pd->bss_num = priv->bss_num;
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local_tx_pd->bss_type = priv->bss_type;
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local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len -
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(sizeof(struct txpd) +
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pad)));
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local_tx_pd->priority = (u8) skb->priority;
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local_tx_pd->pkt_delay_2ms =
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mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
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if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS ||
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tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
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local_tx_pd->tx_token_id = tx_info->ack_frame_id;
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local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
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}
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if (local_tx_pd->priority <
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ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
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/*
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* Set the priority specific tx_control field, setting of 0 will
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* cause the default value to be used later in this function
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*/
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local_tx_pd->tx_control =
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cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
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priority]);
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if (adapter->pps_uapsd_mode) {
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if (mwifiex_check_last_packet_indication(priv)) {
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adapter->tx_lock_flag = true;
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local_tx_pd->flags =
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MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
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}
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}
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if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
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local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;
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/* Offset of actual data */
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pkt_offset = sizeof(struct txpd) + pad;
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if (pkt_type == PKT_TYPE_MGMT) {
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/* Set the packet type and add header for management frame */
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local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
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pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
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}
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local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
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/* make space for adapter->intf_hdr_len */
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skb_push(skb, hroom);
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if (!local_tx_pd->tx_control)
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/* TxCtrl set by user or default */
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local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
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return skb->data;
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}
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/*
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* This function tells firmware to send a NULL data packet.
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*
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* The function creates a NULL data packet with TxPD and sends to the
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* firmware for transmission, with highest priority setting.
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*/
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int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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struct txpd *local_tx_pd;
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struct mwifiex_tx_param tx_param;
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/* sizeof(struct txpd) + Interface specific header */
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#define NULL_PACKET_HDR 64
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u32 data_len = NULL_PACKET_HDR;
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struct sk_buff *skb;
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int ret;
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struct mwifiex_txinfo *tx_info = NULL;
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if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
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return -1;
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if (!priv->media_connected)
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return -1;
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if (adapter->data_sent)
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return -1;
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if (adapter->if_ops.is_port_ready &&
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!adapter->if_ops.is_port_ready(priv))
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return -1;
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skb = dev_alloc_skb(data_len);
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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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memset(tx_info, 0, sizeof(*tx_info));
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tx_info->bss_num = priv->bss_num;
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tx_info->bss_type = priv->bss_type;
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tx_info->pkt_len = data_len -
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(sizeof(struct txpd) + adapter->intf_hdr_len);
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skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_len);
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skb_push(skb, sizeof(struct txpd));
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local_tx_pd = (struct txpd *) skb->data;
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local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
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local_tx_pd->flags = flags;
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local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
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local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
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local_tx_pd->bss_num = priv->bss_num;
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local_tx_pd->bss_type = priv->bss_type;
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skb_push(skb, 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, priv->usb_port,
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skb, NULL);
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} else {
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tx_param.next_pkt_len = 0;
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ret = adapter->if_ops.host_to_card(adapter, 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 -EBUSY:
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dev_kfree_skb_any(skb);
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mwifiex_dbg(adapter, ERROR,
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"%s: host_to_card failed: ret=%d\n",
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__func__, ret);
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adapter->dbg.num_tx_host_to_card_failure++;
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break;
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case -1:
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dev_kfree_skb_any(skb);
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mwifiex_dbg(adapter, ERROR,
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"%s: host_to_card failed: ret=%d\n",
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__func__, ret);
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adapter->dbg.num_tx_host_to_card_failure++;
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break;
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case 0:
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dev_kfree_skb_any(skb);
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mwifiex_dbg(adapter, DATA,
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"data: %s: host_to_card succeeded\n",
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__func__);
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adapter->tx_lock_flag = true;
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break;
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case -EINPROGRESS:
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adapter->tx_lock_flag = true;
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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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* This function checks if we need to send last packet indication.
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*/
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u8
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mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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u8 ret = false;
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if (!adapter->sleep_period.period)
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return ret;
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if (mwifiex_wmm_lists_empty(adapter))
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ret = true;
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if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
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!is_command_pending(adapter)) {
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adapter->delay_null_pkt = false;
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ret = true;
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} else {
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ret = false;
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adapter->delay_null_pkt = true;
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}
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return ret;
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}
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