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