215 lines
6 KiB
C
215 lines
6 KiB
C
/**
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* Copyright (c) 2014 Redpine Signals Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "rsi_mgmt.h"
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/**
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* rsi_send_data_pkt() - This function sends the recieved data packet from
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* driver to device.
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* @common: Pointer to the driver private structure.
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* @skb: Pointer to the socket buffer structure.
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*
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* Return: status: 0 on success, -1 on failure.
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*/
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int rsi_send_data_pkt(struct rsi_common *common, struct sk_buff *skb)
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{
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struct rsi_hw *adapter = common->priv;
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struct ieee80211_hdr *tmp_hdr;
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struct ieee80211_tx_info *info;
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struct skb_info *tx_params;
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struct ieee80211_bss_conf *bss;
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int status;
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u8 ieee80211_size = MIN_802_11_HDR_LEN;
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u8 extnd_size;
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__le16 *frame_desc;
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u16 seq_num;
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info = IEEE80211_SKB_CB(skb);
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bss = &info->control.vif->bss_conf;
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tx_params = (struct skb_info *)info->driver_data;
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if (!bss->assoc) {
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status = -EINVAL;
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goto err;
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}
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tmp_hdr = (struct ieee80211_hdr *)&skb->data[0];
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seq_num = (le16_to_cpu(tmp_hdr->seq_ctrl) >> 4);
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extnd_size = ((uintptr_t)skb->data & 0x3);
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if ((FRAME_DESC_SZ + extnd_size) > skb_headroom(skb)) {
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rsi_dbg(ERR_ZONE, "%s: Unable to send pkt\n", __func__);
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status = -ENOSPC;
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goto err;
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}
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skb_push(skb, (FRAME_DESC_SZ + extnd_size));
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frame_desc = (__le16 *)&skb->data[0];
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memset((u8 *)frame_desc, 0, FRAME_DESC_SZ);
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if (ieee80211_is_data_qos(tmp_hdr->frame_control)) {
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ieee80211_size += 2;
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frame_desc[6] |= cpu_to_le16(BIT(12));
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}
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if ((!(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) &&
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(common->secinfo.security_enable)) {
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if (rsi_is_cipher_wep(common))
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ieee80211_size += 4;
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else
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ieee80211_size += 8;
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frame_desc[6] |= cpu_to_le16(BIT(15));
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}
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frame_desc[0] = cpu_to_le16((skb->len - FRAME_DESC_SZ) |
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(RSI_WIFI_DATA_Q << 12));
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frame_desc[2] = cpu_to_le16((extnd_size) | (ieee80211_size) << 8);
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if (common->min_rate != 0xffff) {
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/* Send fixed rate */
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frame_desc[3] = cpu_to_le16(RATE_INFO_ENABLE);
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frame_desc[4] = cpu_to_le16(common->min_rate);
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if (conf_is_ht40(&common->priv->hw->conf))
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frame_desc[5] = cpu_to_le16(FULL40M_ENABLE);
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if (common->vif_info[0].sgi) {
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if (common->min_rate & 0x100) /* Only MCS rates */
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frame_desc[4] |=
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cpu_to_le16(ENABLE_SHORTGI_RATE);
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}
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}
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frame_desc[6] |= cpu_to_le16(seq_num & 0xfff);
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frame_desc[7] = cpu_to_le16(((tx_params->tid & 0xf) << 4) |
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(skb->priority & 0xf) |
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(tx_params->sta_id << 8));
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status = adapter->host_intf_write_pkt(common->priv,
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skb->data,
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skb->len);
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if (status)
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rsi_dbg(ERR_ZONE, "%s: Failed to write pkt\n",
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__func__);
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err:
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++common->tx_stats.total_tx_pkt_freed[skb->priority];
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rsi_indicate_tx_status(common->priv, skb, status);
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return status;
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}
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/**
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* rsi_send_mgmt_pkt() - This functions sends the received management packet
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* from driver to device.
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* @common: Pointer to the driver private structure.
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* @skb: Pointer to the socket buffer structure.
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*
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* Return: status: 0 on success, -1 on failure.
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*/
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int rsi_send_mgmt_pkt(struct rsi_common *common,
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struct sk_buff *skb)
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{
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struct rsi_hw *adapter = common->priv;
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struct ieee80211_hdr *wh;
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struct ieee80211_tx_info *info;
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struct ieee80211_bss_conf *bss;
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struct ieee80211_hw *hw = adapter->hw;
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struct ieee80211_conf *conf = &hw->conf;
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struct skb_info *tx_params;
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int status = -E2BIG;
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__le16 *msg;
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u8 extnd_size;
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u8 vap_id = 0;
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info = IEEE80211_SKB_CB(skb);
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tx_params = (struct skb_info *)info->driver_data;
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extnd_size = ((uintptr_t)skb->data & 0x3);
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if (tx_params->flags & INTERNAL_MGMT_PKT) {
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if ((extnd_size) > skb_headroom(skb)) {
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rsi_dbg(ERR_ZONE, "%s: Unable to send pkt\n", __func__);
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dev_kfree_skb(skb);
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return -ENOSPC;
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}
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skb_push(skb, extnd_size);
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skb->data[extnd_size + 4] = extnd_size;
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status = adapter->host_intf_write_pkt(common->priv,
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(u8 *)skb->data,
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skb->len);
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if (status) {
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rsi_dbg(ERR_ZONE,
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"%s: Failed to write the packet\n", __func__);
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}
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dev_kfree_skb(skb);
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return status;
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}
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bss = &info->control.vif->bss_conf;
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wh = (struct ieee80211_hdr *)&skb->data[0];
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if (FRAME_DESC_SZ > skb_headroom(skb))
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goto err;
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skb_push(skb, FRAME_DESC_SZ);
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memset(skb->data, 0, FRAME_DESC_SZ);
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msg = (__le16 *)skb->data;
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if (skb->len > MAX_MGMT_PKT_SIZE) {
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rsi_dbg(INFO_ZONE, "%s: Dropping mgmt pkt > 512\n", __func__);
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goto err;
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}
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msg[0] = cpu_to_le16((skb->len - FRAME_DESC_SZ) |
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(RSI_WIFI_MGMT_Q << 12));
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msg[1] = cpu_to_le16(TX_DOT11_MGMT);
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msg[2] = cpu_to_le16(MIN_802_11_HDR_LEN << 8);
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msg[3] = cpu_to_le16(RATE_INFO_ENABLE);
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msg[6] = cpu_to_le16(le16_to_cpu(wh->seq_ctrl) >> 4);
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if (wh->addr1[0] & BIT(0))
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msg[3] |= cpu_to_le16(RSI_BROADCAST_PKT);
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if (common->band == NL80211_BAND_2GHZ)
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msg[4] = cpu_to_le16(RSI_11B_MODE);
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else
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msg[4] = cpu_to_le16((RSI_RATE_6 & 0x0f) | RSI_11G_MODE);
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if (conf_is_ht40(conf)) {
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msg[4] = cpu_to_le16(0xB | RSI_11G_MODE);
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msg[5] = cpu_to_le16(0x6);
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}
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/* Indicate to firmware to give cfm */
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if ((skb->data[16] == IEEE80211_STYPE_PROBE_REQ) && (!bss->assoc)) {
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msg[1] |= cpu_to_le16(BIT(10));
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msg[7] = cpu_to_le16(PROBEREQ_CONFIRM);
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common->mgmt_q_block = true;
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}
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msg[7] |= cpu_to_le16(vap_id << 8);
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status = adapter->host_intf_write_pkt(common->priv,
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(u8 *)msg,
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skb->len);
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if (status)
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rsi_dbg(ERR_ZONE, "%s: Failed to write the packet\n", __func__);
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err:
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rsi_indicate_tx_status(common->priv, skb, status);
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return status;
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}
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