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linux/drivers/net/wireless/rtlwifi/base.c

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/******************************************************************************
*
* Copyright(c) 2009-2010 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <wlanfae@realtek.com>
* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
* Hsinchu 300, Taiwan.
*
* Larry Finger <Larry.Finger@lwfinger.net>
*
*****************************************************************************/
#include <linux/ip.h>
#include "wifi.h"
#include "rc.h"
#include "base.h"
#include "efuse.h"
#include "cam.h"
#include "ps.h"
#include "regd.h"
/*
*NOTICE!!!: This file will be very big, we hsould
*keep it clear under follwing roles:
*
*This file include follwing part, so, if you add new
*functions into this file, please check which part it
*should includes. or check if you should add new part
*for this file:
*
*1) mac80211 init functions
*2) tx information functions
*3) functions called by core.c
*4) wq & timer callback functions
*5) frame process functions
*6) sysfs functions
*7) ...
*/
/*********************************************************
*
* mac80211 init functions
*
*********************************************************/
static struct ieee80211_channel rtl_channeltable[] = {
{.center_freq = 2412, .hw_value = 1,},
{.center_freq = 2417, .hw_value = 2,},
{.center_freq = 2422, .hw_value = 3,},
{.center_freq = 2427, .hw_value = 4,},
{.center_freq = 2432, .hw_value = 5,},
{.center_freq = 2437, .hw_value = 6,},
{.center_freq = 2442, .hw_value = 7,},
{.center_freq = 2447, .hw_value = 8,},
{.center_freq = 2452, .hw_value = 9,},
{.center_freq = 2457, .hw_value = 10,},
{.center_freq = 2462, .hw_value = 11,},
{.center_freq = 2467, .hw_value = 12,},
{.center_freq = 2472, .hw_value = 13,},
{.center_freq = 2484, .hw_value = 14,},
};
static struct ieee80211_rate rtl_ratetable[] = {
{.bitrate = 10, .hw_value = 0x00,},
{.bitrate = 20, .hw_value = 0x01,},
{.bitrate = 55, .hw_value = 0x02,},
{.bitrate = 110, .hw_value = 0x03,},
{.bitrate = 60, .hw_value = 0x04,},
{.bitrate = 90, .hw_value = 0x05,},
{.bitrate = 120, .hw_value = 0x06,},
{.bitrate = 180, .hw_value = 0x07,},
{.bitrate = 240, .hw_value = 0x08,},
{.bitrate = 360, .hw_value = 0x09,},
{.bitrate = 480, .hw_value = 0x0a,},
{.bitrate = 540, .hw_value = 0x0b,},
};
static const struct ieee80211_supported_band rtl_band_2ghz = {
.band = IEEE80211_BAND_2GHZ,
.channels = rtl_channeltable,
.n_channels = ARRAY_SIZE(rtl_channeltable),
.bitrates = rtl_ratetable,
.n_bitrates = ARRAY_SIZE(rtl_ratetable),
.ht_cap = {0},
};
static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
struct ieee80211_sta_ht_cap *ht_cap)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_phy *rtlphy = &(rtlpriv->phy);
ht_cap->ht_supported = true;
ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_SGI_40 |
IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;
/*
*Maximum length of AMPDU that the STA can receive.
*Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
*/
ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
/*Minimum MPDU start spacing , */
ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;
ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
/*
*hw->wiphy->bands[IEEE80211_BAND_2GHZ]
*base on ant_num
*rx_mask: RX mask
*if rx_ant =1 rx_mask[0]=0xff;==>MCS0-MCS7
*if rx_ant =2 rx_mask[1]=0xff;==>MCS8-MCS15
*if rx_ant >=3 rx_mask[2]=0xff;
*if BW_40 rx_mask[4]=0x01;
*highest supported RX rate
*/
if (get_rf_type(rtlphy) == RF_1T2R || get_rf_type(rtlphy) == RF_2T2R) {
RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T2R or 2T2R\n"));
ht_cap->mcs.rx_mask[0] = 0xFF;
ht_cap->mcs.rx_mask[1] = 0xFF;
ht_cap->mcs.rx_mask[4] = 0x01;
ht_cap->mcs.rx_highest = MAX_BIT_RATE_40MHZ_MCS15;
} else if (get_rf_type(rtlphy) == RF_1T1R) {
RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T1R\n"));
ht_cap->mcs.rx_mask[0] = 0xFF;
ht_cap->mcs.rx_mask[1] = 0x00;
ht_cap->mcs.rx_mask[4] = 0x01;
ht_cap->mcs.rx_highest = MAX_BIT_RATE_40MHZ_MCS7;
}
}
static void _rtl_init_mac80211(struct ieee80211_hw *hw)
{
struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
struct ieee80211_supported_band *sband;
/* <1> use mac->bands as mem for hw->wiphy->bands */
sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);
/*
* <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
* to default value(1T1R)
*/
memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]), &rtl_band_2ghz,
sizeof(struct ieee80211_supported_band));
/* <3> init ht cap base on ant_num */
_rtl_init_hw_ht_capab(hw, &sband->ht_cap);
/* <4> set mac->sband to wiphy->sband */
hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
/* <5> set hw caps */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_BEACON_FILTER | IEEE80211_HW_AMPDU_AGGREGATION | /*PS*/
/*IEEE80211_HW_SUPPORTS_PS | */
/*IEEE80211_HW_PS_NULLFUNC_STACK | */
/*IEEE80211_HW_SUPPORTS_DYNAMIC_PS | */
IEEE80211_HW_REPORTS_TX_ACK_STATUS | 0;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
hw->wiphy->rts_threshold = 2347;
hw->queues = AC_MAX;
hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;
/* TODO: Correct this value for our hw */
/* TODO: define these hard code value */
hw->channel_change_time = 100;
hw->max_listen_interval = 5;
hw->max_rate_tries = 4;
/* hw->max_rates = 1; */
/* <6> mac address */
if (is_valid_ether_addr(rtlefuse->dev_addr)) {
SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
} else {
u8 rtlmac[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };
get_random_bytes((rtlmac + (ETH_ALEN - 1)), 1);
SET_IEEE80211_PERM_ADDR(hw, rtlmac);
}
}
static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
/* <1> timer */
init_timer(&rtlpriv->works.watchdog_timer);
setup_timer(&rtlpriv->works.watchdog_timer,
rtl_watch_dog_timer_callback, (unsigned long)hw);
/* <2> work queue */
rtlpriv->works.hw = hw;
rtlpriv->works.rtl_wq = alloc_workqueue(rtlpriv->cfg->name, 0, 0);
INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
(void *)rtl_watchdog_wq_callback);
INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
(void *)rtl_ips_nic_off_wq_callback);
}
void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
del_timer_sync(&rtlpriv->works.watchdog_timer);
cancel_delayed_work(&rtlpriv->works.watchdog_wq);
cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
}
void rtl_init_rfkill(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
bool radio_state;
bool blocked;
u8 valid = 0;
radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
/*set init state to that of switch */
rtlpriv->rfkill.rfkill_state = radio_state;
printk(KERN_INFO "rtlwifi: wireless switch is %s\n",
rtlpriv->rfkill.rfkill_state ? "on" : "off");
if (valid) {
rtlpriv->rfkill.rfkill_state = radio_state;
blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
}
wiphy_rfkill_start_polling(hw->wiphy);
}
void rtl_deinit_rfkill(struct ieee80211_hw *hw)
{
wiphy_rfkill_stop_polling(hw->wiphy);
}
int rtl_init_core(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
/* <1> init mac80211 */
_rtl_init_mac80211(hw);
rtlmac->hw = hw;
/* <2> rate control register */
if (rtl_rate_control_register()) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
("rtl: Unable to register rtl_rc,"
"use default RC !!\n"));
} else {
hw->rate_control_algorithm = "rtl_rc";
}
/*
* <3> init CRDA must come after init
* mac80211 hw in _rtl_init_mac80211.
*/
if (rtl_regd_init(hw, rtl_reg_notifier)) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
return 1;
} else {
/* CRDA regd hint must after init CRDA */
if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
("regulatory_hint fail\n"));
}
}
/* <4> locks */
mutex_init(&rtlpriv->locks.conf_mutex);
spin_lock_init(&rtlpriv->locks.ips_lock);
spin_lock_init(&rtlpriv->locks.irq_th_lock);
spin_lock_init(&rtlpriv->locks.h2c_lock);
spin_lock_init(&rtlpriv->locks.rf_ps_lock);
spin_lock_init(&rtlpriv->locks.rf_lock);
spin_lock_init(&rtlpriv->locks.lps_lock);
rtlmac->link_state = MAC80211_NOLINK;
/* <5> init deferred work */
_rtl_init_deferred_work(hw);
return 0;
}
void rtl_deinit_core(struct ieee80211_hw *hw)
{
/*RC*/
rtl_rate_control_unregister();
}
void rtl_init_rx_config(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_MGT_FILTER,
(u8 *) (&mac->rx_mgt_filter));
rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_CTRL_FILTER,
(u8 *) (&mac->rx_ctrl_filter));
rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_DATA_FILTER,
(u8 *) (&mac->rx_data_filter));
}
/*********************************************************
*
* tx information functions
*
*********************************************************/
static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
struct rtl_tcb_desc *tcb_desc,
struct ieee80211_tx_info *info)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 rate_flag = info->control.rates[0].flags;
tcb_desc->use_shortpreamble = false;
/* 1M can only use Long Preamble. 11B spec */
if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
return;
else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
tcb_desc->use_shortpreamble = true;
return;
}
static void _rtl_query_shortgi(struct ieee80211_hw *hw,
struct rtl_tcb_desc *tcb_desc,
struct ieee80211_tx_info *info)
{
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
u8 rate_flag = info->control.rates[0].flags;
tcb_desc->use_shortgi = false;
if (!mac->ht_enable)
return;
if (!mac->sgi_40 && !mac->sgi_20)
return;
if ((mac->bw_40 == true) && mac->sgi_40)
tcb_desc->use_shortgi = true;
else if ((mac->bw_40 == false) && mac->sgi_20)
tcb_desc->use_shortgi = true;
if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
tcb_desc->use_shortgi = false;
}
static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
struct rtl_tcb_desc *tcb_desc,
struct ieee80211_tx_info *info)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u8 rate_flag = info->control.rates[0].flags;
/* Common Settings */
tcb_desc->b_rts_stbc = false;
tcb_desc->b_cts_enable = false;
tcb_desc->rts_sc = 0;
tcb_desc->b_rts_bw = false;
tcb_desc->b_rts_use_shortpreamble = false;
tcb_desc->b_rts_use_shortgi = false;
if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
/* Use CTS-to-SELF in protection mode. */
tcb_desc->b_rts_enable = true;
tcb_desc->b_cts_enable = true;
tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
} else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
/* Use RTS-CTS in protection mode. */
tcb_desc->b_rts_enable = true;
tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
}
}
static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
struct rtl_tcb_desc *tcb_desc)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
if (mac->opmode == NL80211_IFTYPE_STATION)
tcb_desc->ratr_index = 0;
else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
if (tcb_desc->b_multicast || tcb_desc->b_broadcast) {
tcb_desc->hw_rate =
rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
tcb_desc->use_driver_rate = 1;
} else {
/* TODO */
}
}
}
if (rtlpriv->dm.b_useramask) {
/* TODO we will differentiate adhoc and station futrue */
tcb_desc->mac_id = 0;
if ((mac->mode == WIRELESS_MODE_N_24G) ||
(mac->mode == WIRELESS_MODE_N_5G)) {
tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
} else if (mac->mode & WIRELESS_MODE_G) {
tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
} else if (mac->mode & WIRELESS_MODE_B) {
tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
}
}
}
static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
struct rtl_tcb_desc *tcb_desc)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
tcb_desc->b_packet_bw = false;
if (!mac->bw_40 || !mac->ht_enable)
return;
if (tcb_desc->b_multicast || tcb_desc->b_broadcast)
return;
/*use legency rate, shall use 20MHz */
if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
return;
tcb_desc->b_packet_bw = true;
}
static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_phy *rtlphy = &(rtlpriv->phy);
u8 hw_rate;
if (get_rf_type(rtlphy) == RF_2T2R)
hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
else
hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
return hw_rate;
}
void rtl_get_tcb_desc(struct ieee80211_hw *hw,
struct ieee80211_tx_info *info,
struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
struct ieee80211_rate *txrate;
u16 fc = le16_to_cpu(hdr->frame_control);
memset(tcb_desc, 0, sizeof(struct rtl_tcb_desc));
if (ieee80211_is_data(fc)) {
txrate = ieee80211_get_tx_rate(hw, info);
tcb_desc->hw_rate = txrate->hw_value;
/*
*we set data rate RTL_RC_CCK_RATE1M
*in rtl_rc.c if skb is special data or
*mgt which need low data rate.
*/
/*
*So tcb_desc->hw_rate is just used for
*special data and mgt frames
*/
if (tcb_desc->hw_rate < rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M]) {
tcb_desc->use_driver_rate = true;
tcb_desc->ratr_index = 7;
tcb_desc->hw_rate =
rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
tcb_desc->disable_ratefallback = 1;
} else {
/*
*because hw will nerver use hw_rate
*when tcb_desc->use_driver_rate = false
*so we never set highest N rate here,
*and N rate will all be controled by FW
*when tcb_desc->use_driver_rate = false
*/
if (rtlmac->ht_enable) {
tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
} else {
if (rtlmac->mode == WIRELESS_MODE_B) {
tcb_desc->hw_rate =
rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
} else {
tcb_desc->hw_rate =
rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
}
}
}
if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
tcb_desc->b_multicast = 1;
else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
tcb_desc->b_broadcast = 1;
_rtl_txrate_selectmode(hw, tcb_desc);
_rtl_query_bandwidth_mode(hw, tcb_desc);
_rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
_rtl_query_shortgi(hw, tcb_desc, info);
_rtl_query_protection_mode(hw, tcb_desc, info);
} else {
tcb_desc->use_driver_rate = true;
tcb_desc->ratr_index = 7;
tcb_desc->disable_ratefallback = 1;
tcb_desc->mac_id = 0;
tcb_desc->hw_rate = rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
}
}
EXPORT_SYMBOL(rtl_get_tcb_desc);
bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
u16 fc = le16_to_cpu(hdr->frame_control);
if (ieee80211_is_auth(fc)) {
RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
rtl_ips_nic_on(hw);
mac->link_state = MAC80211_LINKING;
}
return true;
}
bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
struct rtl_priv *rtlpriv = rtl_priv(hw);
u16 fc = le16_to_cpu(hdr->frame_control);
u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
u8 category;
if (!ieee80211_is_action(fc))
return true;
category = *act;
act++;
switch (category) {
case ACT_CAT_BA:
switch (*act) {
case ACT_ADDBAREQ:
if (mac->act_scanning)
return false;
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
("%s ACT_ADDBAREQ From :" MAC_FMT "\n",
is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
break;
case ACT_ADDBARSP:
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
("%s ACT_ADDBARSP From :" MAC_FMT "\n",
is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
break;
case ACT_DELBA:
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
("ACT_ADDBADEL From :" MAC_FMT "\n",
MAC_ARG(hdr->addr2)));
break;
}
break;
default:
break;
}
return true;
}
/*should call before software enc*/
u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
u16 fc = le16_to_cpu(hdr->frame_control);
u16 ether_type;
u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
const struct iphdr *ip;
if (!ieee80211_is_data(fc))
goto end;
if (ieee80211_is_nullfunc(fc))
return true;
ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
SNAP_SIZE + PROTOC_TYPE_SIZE);
ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
ether_type = ntohs(ether_type);
if (ETH_P_IP == ether_type) {
if (IPPROTO_UDP == ip->protocol) {
struct udphdr *udp = (struct udphdr *)((u8 *) ip +
(ip->ihl << 2));
if (((((u8 *) udp)[1] == 68) &&
(((u8 *) udp)[3] == 67)) ||
((((u8 *) udp)[1] == 67) &&
(((u8 *) udp)[3] == 68))) {
/*
* 68 : UDP BOOTP client
* 67 : UDP BOOTP server
*/
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
DBG_DMESG, ("dhcp %s !!\n",
(is_tx) ? "Tx" : "Rx"));
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies =
jiffies;
}
return true;
}
}
} else if (ETH_P_ARP == ether_type) {
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (ETH_P_PAE == ether_type) {
RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
if (is_tx) {
rtl_lps_leave(hw);
ppsc->last_delaylps_stamp_jiffies = jiffies;
}
return true;
} else if (0x86DD == ether_type) {
return true;
}
end:
return false;
}
/*********************************************************
*
* functions called by core.c
*
*********************************************************/
int rtl_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, u16 tid, u16 *ssn)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_tid_data *tid_data;
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
("on ra = %pM tid = %d\n", ra, tid));
if (unlikely(tid >= MAX_TID_COUNT))
return -EINVAL;
if (mac->tids[tid].agg.agg_state != RTL_AGG_OFF) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
("Start AGG when state is not RTL_AGG_OFF !\n"));
return -ENXIO;
}
tid_data = &mac->tids[tid];
*ssn = SEQ_TO_SN(tid_data->seq_number);
RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
("HW queue is empty tid:%d\n", tid));
tid_data->agg.agg_state = RTL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(mac->vif, ra, tid);
return 0;
}
int rtl_tx_agg_stop(struct ieee80211_hw *hw, const u8 * ra, u16 tid)
{
int ssn = -1;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_tid_data *tid_data;
if (!ra) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
return -EINVAL;
}
if (unlikely(tid >= MAX_TID_COUNT))
return -EINVAL;
if (mac->tids[tid].agg.agg_state != RTL_AGG_ON)
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
("Stopping AGG while state not ON or starting\n"));
tid_data = &mac->tids[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
mac->tids[tid].agg.agg_state = RTL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, ra, tid);
return 0;
}
/*********************************************************
*
* wq & timer callback functions
*
*********************************************************/
void rtl_watchdog_wq_callback(void *data)
{
struct rtl_works *rtlworks = container_of_dwork_rtl(data,
struct rtl_works,
watchdog_wq);
struct ieee80211_hw *hw = rtlworks->hw;
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
bool b_busytraffic = false;
bool b_higher_busytraffic = false;
bool b_higher_busyrxtraffic = false;
bool b_higher_busytxtraffic = false;
u8 idx = 0;
u32 rx_cnt_inp4eriod = 0;
u32 tx_cnt_inp4eriod = 0;
u32 aver_rx_cnt_inperiod = 0;
u32 aver_tx_cnt_inperiod = 0;
bool benter_ps = false;
if (is_hal_stop(rtlhal))
return;
/* <1> Determine if action frame is allowed */
if (mac->link_state > MAC80211_NOLINK) {
if (mac->cnt_after_linked < 20)
mac->cnt_after_linked++;
} else {
mac->cnt_after_linked = 0;
}
/* <2> DM */
rtlpriv->cfg->ops->dm_watchdog(hw);
/*
*<3> to check if traffic busy, if
* busytraffic we don't change channel
*/
if (mac->link_state >= MAC80211_LINKED) {
/* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
for (idx = 0; idx <= 2; idx++) {
rtlpriv->link_info.num_rx_in4period[idx] =
rtlpriv->link_info.num_rx_in4period[idx + 1];
rtlpriv->link_info.num_tx_in4period[idx] =
rtlpriv->link_info.num_tx_in4period[idx + 1];
}
rtlpriv->link_info.num_rx_in4period[3] =
rtlpriv->link_info.num_rx_inperiod;
rtlpriv->link_info.num_tx_in4period[3] =
rtlpriv->link_info.num_tx_inperiod;
for (idx = 0; idx <= 3; idx++) {
rx_cnt_inp4eriod +=
rtlpriv->link_info.num_rx_in4period[idx];
tx_cnt_inp4eriod +=
rtlpriv->link_info.num_tx_in4period[idx];
}
aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
/* (2) check traffic busy */
if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
b_busytraffic = true;
/* Higher Tx/Rx data. */
if (aver_rx_cnt_inperiod > 4000 ||
aver_tx_cnt_inperiod > 4000) {
b_higher_busytraffic = true;
/* Extremely high Rx data. */
if (aver_rx_cnt_inperiod > 5000)
b_higher_busyrxtraffic = true;
else
b_higher_busytxtraffic = false;
}
if (((rtlpriv->link_info.num_rx_inperiod +
rtlpriv->link_info.num_tx_inperiod) > 8) ||
(rtlpriv->link_info.num_rx_inperiod > 2))
benter_ps = false;
else
benter_ps = true;
/* LeisurePS only work in infra mode. */
if (benter_ps)
rtl_lps_enter(hw);
else
rtl_lps_leave(hw);
}
rtlpriv->link_info.num_rx_inperiod = 0;
rtlpriv->link_info.num_tx_inperiod = 0;
rtlpriv->link_info.b_busytraffic = b_busytraffic;
rtlpriv->link_info.b_higher_busytraffic = b_higher_busytraffic;
rtlpriv->link_info.b_higher_busyrxtraffic = b_higher_busyrxtraffic;
}
void rtl_watch_dog_timer_callback(unsigned long data)
{
struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
struct rtl_priv *rtlpriv = rtl_priv(hw);
queue_delayed_work(rtlpriv->works.rtl_wq,
&rtlpriv->works.watchdog_wq, 0);
mod_timer(&rtlpriv->works.watchdog_timer,
jiffies + MSECS(RTL_WATCH_DOG_TIME));
}
/*********************************************************
*
* sysfs functions
*
*********************************************************/
static ssize_t rtl_show_debug_level(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ieee80211_hw *hw = dev_get_drvdata(d);
struct rtl_priv *rtlpriv = rtl_priv(hw);
return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
}
static ssize_t rtl_store_debug_level(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ieee80211_hw *hw = dev_get_drvdata(d);
struct rtl_priv *rtlpriv = rtl_priv(hw);
unsigned long val;
int ret;
ret = strict_strtoul(buf, 0, &val);
if (ret) {
printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
} else {
rtlpriv->dbg.global_debuglevel = val;
printk(KERN_DEBUG "debuglevel:%x\n",
rtlpriv->dbg.global_debuglevel);
}
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
rtl_show_debug_level, rtl_store_debug_level);
static struct attribute *rtl_sysfs_entries[] = {
&dev_attr_debug_level.attr,
NULL
};
/*
* "name" is folder name witch will be
* put in device directory like :
* sys/devices/pci0000:00/0000:00:1c.4/
* 0000:06:00.0/rtl_sysfs
*/
struct attribute_group rtl_attribute_group = {
.name = "rtlsysfs",
.attrs = rtl_sysfs_entries,
};
MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
static int __init rtl_core_module_init(void)
{
return 0;
}
static void __exit rtl_core_module_exit(void)
{
}
module_init(rtl_core_module_init);
module_exit(rtl_core_module_exit);
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