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ubuntu-linux-kernel/drivers/net/wireless/rsi/rsi_91x_mac80211.c

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2024-04-01 15:06:58 +00:00
/**
* 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 <linux/etherdevice.h>
#include "rsi_debugfs.h"
#include "rsi_mgmt.h"
#include "rsi_sdio.h"
#include "rsi_common.h"
#include "rsi_ps.h"
static const struct ieee80211_channel rsi_2ghz_channels[] = {
{ .band = NL80211_BAND_2GHZ, .center_freq = 2412,
.hw_value = 1 }, /* Channel 1 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2417,
.hw_value = 2 }, /* Channel 2 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2422,
.hw_value = 3 }, /* Channel 3 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2427,
.hw_value = 4 }, /* Channel 4 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2432,
.hw_value = 5 }, /* Channel 5 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2437,
.hw_value = 6 }, /* Channel 6 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2442,
.hw_value = 7 }, /* Channel 7 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2447,
.hw_value = 8 }, /* Channel 8 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2452,
.hw_value = 9 }, /* Channel 9 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2457,
.hw_value = 10 }, /* Channel 10 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2462,
.hw_value = 11 }, /* Channel 11 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2467,
.hw_value = 12 }, /* Channel 12 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2472,
.hw_value = 13 }, /* Channel 13 */
{ .band = NL80211_BAND_2GHZ, .center_freq = 2484,
.hw_value = 14 }, /* Channel 14 */
};
static const struct ieee80211_channel rsi_5ghz_channels[] = {
{ .band = NL80211_BAND_5GHZ, .center_freq = 5180,
.hw_value = 36, }, /* Channel 36 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5200,
.hw_value = 40, }, /* Channel 40 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5220,
.hw_value = 44, }, /* Channel 44 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5240,
.hw_value = 48, }, /* Channel 48 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5260,
.hw_value = 52, }, /* Channel 52 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5280,
.hw_value = 56, }, /* Channel 56 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5300,
.hw_value = 60, }, /* Channel 60 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5320,
.hw_value = 64, }, /* Channel 64 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5500,
.hw_value = 100, }, /* Channel 100 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5520,
.hw_value = 104, }, /* Channel 104 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5540,
.hw_value = 108, }, /* Channel 108 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5560,
.hw_value = 112, }, /* Channel 112 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5580,
.hw_value = 116, }, /* Channel 116 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5600,
.hw_value = 120, }, /* Channel 120 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5620,
.hw_value = 124, }, /* Channel 124 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5640,
.hw_value = 128, }, /* Channel 128 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5660,
.hw_value = 132, }, /* Channel 132 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5680,
.hw_value = 136, }, /* Channel 136 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5700,
.hw_value = 140, }, /* Channel 140 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5745,
.hw_value = 149, }, /* Channel 149 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5765,
.hw_value = 153, }, /* Channel 153 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5785,
.hw_value = 157, }, /* Channel 157 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5805,
.hw_value = 161, }, /* Channel 161 */
{ .band = NL80211_BAND_5GHZ, .center_freq = 5825,
.hw_value = 165, }, /* Channel 165 */
};
struct ieee80211_rate rsi_rates[12] = {
{ .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 },
{ .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 },
{ .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
{ .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 },
{ .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 },
{ .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 },
{ .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 },
{ .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 },
{ .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 },
{ .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 },
{ .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 },
{ .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 },
};
const u16 rsi_mcsrates[8] = {
RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
};
static const u32 rsi_max_ap_stas[16] = {
32, /* 1 - Wi-Fi alone */
0, /* 2 */
0, /* 3 */
0, /* 4 - BT EDR alone */
4, /* 5 - STA + BT EDR */
32, /* 6 - AP + BT EDR */
0, /* 7 */
0, /* 8 - BT LE alone */
4, /* 9 - STA + BE LE */
0, /* 10 */
0, /* 11 */
0, /* 12 */
1, /* 13 - STA + BT Dual */
4, /* 14 - AP + BT Dual */
};
static const struct ieee80211_iface_limit rsi_iface_limits[] = {
{
.max = 1,
.types = BIT(NL80211_IFTYPE_STATION),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO),
},
{
.max = 1,
.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
},
};
static const struct ieee80211_iface_combination rsi_iface_combinations[] = {
{
.num_different_channels = 1,
.max_interfaces = 3,
.limits = rsi_iface_limits,
.n_limits = ARRAY_SIZE(rsi_iface_limits),
},
};
/**
* rsi_is_cipher_wep() - This function determines if the cipher is WEP or not.
* @common: Pointer to the driver private structure.
*
* Return: If cipher type is WEP, a value of 1 is returned, else 0.
*/
bool rsi_is_cipher_wep(struct rsi_common *common)
{
if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
(common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
(!common->secinfo.ptk_cipher))
return true;
else
return false;
}
/**
* rsi_register_rates_channels() - This function registers channels and rates.
* @adapter: Pointer to the adapter structure.
* @band: Operating band to be set.
*
* Return: None.
*/
static void rsi_register_rates_channels(struct rsi_hw *adapter, int band)
{
struct ieee80211_supported_band *sbands = &adapter->sbands[band];
void *channels = NULL;
if (band == NL80211_BAND_2GHZ) {
channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL);
memcpy(channels,
rsi_2ghz_channels,
sizeof(rsi_2ghz_channels));
sbands->band = NL80211_BAND_2GHZ;
sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
sbands->bitrates = rsi_rates;
sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
} else {
channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL);
memcpy(channels,
rsi_5ghz_channels,
sizeof(rsi_5ghz_channels));
sbands->band = NL80211_BAND_5GHZ;
sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
sbands->bitrates = &rsi_rates[4];
sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
}
sbands->channels = channels;
memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
sbands->ht_cap.ht_supported = true;
sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_SGI_40);
sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
sbands->ht_cap.mcs.rx_mask[0] = 0xff;
sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
/* sbands->ht_cap.mcs.rx_highest = 0x82; */
}
/**
* rsi_mac80211_detach() - This function is used to de-initialize the
* Mac80211 stack.
* @adapter: Pointer to the adapter structure.
*
* Return: None.
*/
void rsi_mac80211_detach(struct rsi_hw *adapter)
{
struct ieee80211_hw *hw = adapter->hw;
enum nl80211_band band;
if (hw) {
ieee80211_stop_queues(hw);
ieee80211_unregister_hw(hw);
ieee80211_free_hw(hw);
}
for (band = 0; band < NUM_NL80211_BANDS; band++) {
struct ieee80211_supported_band *sband =
&adapter->sbands[band];
kfree(sband->channels);
}
#ifdef CONFIG_RSI_DEBUGFS
rsi_remove_dbgfs(adapter);
kfree(adapter->dfsentry);
#endif
}
EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
/**
* rsi_indicate_tx_status() - This function indicates the transmit status.
* @adapter: Pointer to the adapter structure.
* @skb: Pointer to the socket buffer structure.
* @status: Status
*
* Return: None.
*/
void rsi_indicate_tx_status(struct rsi_hw *adapter,
struct sk_buff *skb,
int status)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct skb_info *tx_params;
if (!adapter->hw) {
rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
return;
}
if (!status)
info->flags |= IEEE80211_TX_STAT_ACK;
tx_params = (struct skb_info *)info->driver_data;
skb_pull(skb, tx_params->internal_hdr_size);
memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
ieee80211_tx_status_irqsafe(adapter->hw, skb);
}
/**
* rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
* transmitted frame.SKB contains the buffer starting
* from the IEEE 802.11 header.
* @hw: Pointer to the ieee80211_hw structure.
* @control: Pointer to the ieee80211_tx_control structure
* @skb: Pointer to the socket buffer structure.
*
* Return: None
*/
static void rsi_mac80211_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
rsi_core_xmit(common, skb);
}
/**
* rsi_mac80211_start() - This is first handler that 802.11 module calls, since
* the driver init is complete by then, just
* returns success.
* @hw: Pointer to the ieee80211_hw structure.
*
* Return: 0 as success.
*/
static int rsi_mac80211_start(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
mutex_lock(&common->mutex);
if (common->hibernate_resume) {
common->reinit_hw = true;
adapter->host_intf_ops->reinit_device(adapter);
wait_for_completion(&adapter->priv->wlan_init_completion);
}
common->iface_down = false;
wiphy_rfkill_start_polling(hw->wiphy);
rsi_send_rx_filter_frame(common, 0);
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
* @hw: Pointer to the ieee80211_hw structure.
*
* Return: None.
*/
static void rsi_mac80211_stop(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
mutex_lock(&common->mutex);
common->iface_down = true;
wiphy_rfkill_stop_polling(hw->wiphy);
/* Block all rx frames */
rsi_send_rx_filter_frame(common, 0xffff);
mutex_unlock(&common->mutex);
}
static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
{
switch (vif_type) {
case NL80211_IFTYPE_STATION:
return RSI_OPMODE_STA;
case NL80211_IFTYPE_AP:
return RSI_OPMODE_AP;
case NL80211_IFTYPE_P2P_DEVICE:
return RSI_OPMODE_P2P_CLIENT;
case NL80211_IFTYPE_P2P_CLIENT:
return RSI_OPMODE_P2P_CLIENT;
case NL80211_IFTYPE_P2P_GO:
return RSI_OPMODE_P2P_GO;
default:
return RSI_OPMODE_UNSUPPORTED;
}
}
/**
* rsi_mac80211_add_interface() - This function is called when a netdevice
* attached to the hardware is enabled.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
*
* Return: ret: 0 on success, negative error code on failure.
*/
static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
enum opmode intf_mode;
enum vap_status vap_status;
int vap_idx = -1, i;
vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
mutex_lock(&common->mutex);
intf_mode = rsi_map_intf_mode(vif->type);
if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
rsi_dbg(ERR_ZONE,
"%s: Interface type %d not supported\n", __func__,
vif->type);
mutex_unlock(&common->mutex);
return -EOPNOTSUPP;
}
if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
(vif->type == NL80211_IFTYPE_P2P_GO))
common->p2p_enabled = true;
/* Get free vap index */
for (i = 0; i < RSI_MAX_VIFS; i++) {
if (!adapter->vifs[i]) {
vap_idx = i;
break;
}
}
if (vap_idx < 0) {
rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
mutex_unlock(&common->mutex);
return -EOPNOTSUPP;
}
vif_info->vap_id = vap_idx;
adapter->vifs[vap_idx] = vif;
adapter->sc_nvifs++;
vap_status = VAP_ADD;
if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
vif_info->vap_id, vap_status)) {
rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
mutex_unlock(&common->mutex);
return -EINVAL;
}
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
common->min_rate = RSI_RATE_AUTO;
for (i = 0; i < common->max_stations; i++)
common->stations[i].sta = NULL;
}
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_mac80211_remove_interface() - This function notifies driver that an
* interface is going down.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
*
* Return: None.
*/
static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
enum opmode opmode;
int i;
rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
mutex_lock(&common->mutex);
if (adapter->sc_nvifs <= 0) {
mutex_unlock(&common->mutex);
return;
}
opmode = rsi_map_intf_mode(vif->type);
if (opmode == RSI_OPMODE_UNSUPPORTED) {
rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
mutex_unlock(&common->mutex);
return;
}
for (i = 0; i < RSI_MAX_VIFS; i++) {
if (!adapter->vifs[i])
continue;
if (vif == adapter->vifs[i]) {
rsi_set_vap_capabilities(common, opmode, vif->addr,
i, VAP_DELETE);
adapter->sc_nvifs--;
adapter->vifs[i] = NULL;
}
}
mutex_unlock(&common->mutex);
}
/**
* rsi_channel_change() - This function is a performs the checks
* required for changing a channel and sets
* the channel accordingly.
* @hw: Pointer to the ieee80211_hw structure.
*
* Return: 0 on success, negative error code on failure.
*/
static int rsi_channel_change(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
int status = -EOPNOTSUPP;
struct ieee80211_channel *curchan = hw->conf.chandef.chan;
u16 channel = curchan->hw_value;
struct ieee80211_vif *vif;
struct ieee80211_bss_conf *bss;
bool assoc = false;
int i;
rsi_dbg(INFO_ZONE,
"%s: Set channel: %d MHz type: %d channel_no %d\n",
__func__, curchan->center_freq,
curchan->flags, channel);
for (i = 0; i < RSI_MAX_VIFS; i++) {
vif = adapter->vifs[i];
if (!vif)
continue;
if (vif->type == NL80211_IFTYPE_STATION) {
bss = &vif->bss_conf;
if (bss->assoc) {
assoc = true;
break;
}
}
}
if (assoc) {
if (!common->hw_data_qs_blocked &&
(rsi_get_connected_channel(vif) != channel)) {
rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
if (!rsi_send_block_unblock_frame(common, true))
common->hw_data_qs_blocked = true;
}
}
status = rsi_band_check(common, curchan);
if (!status)
status = rsi_set_channel(adapter->priv, curchan);
if (assoc) {
if (common->hw_data_qs_blocked &&
(rsi_get_connected_channel(vif) == channel)) {
rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
if (!rsi_send_block_unblock_frame(common, false))
common->hw_data_qs_blocked = false;
}
}
return status;
}
/**
* rsi_config_power() - This function configures tx power to device
* @hw: Pointer to the ieee80211_hw structure.
*
* Return: 0 on success, negative error code on failure.
*/
static int rsi_config_power(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct ieee80211_conf *conf = &hw->conf;
if (adapter->sc_nvifs <= 0) {
rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
return -EINVAL;
}
rsi_dbg(INFO_ZONE,
"%s: Set tx power: %d dBM\n", __func__, conf->power_level);
if (conf->power_level == common->tx_power)
return 0;
common->tx_power = conf->power_level;
return rsi_send_radio_params_update(common);
}
/**
* rsi_mac80211_config() - This function is a handler for configuration
* requests. The stack calls this function to
* change hardware configuration, e.g., channel.
* @hw: Pointer to the ieee80211_hw structure.
* @changed: Changed flags set.
*
* Return: 0 on success, negative error code on failure.
*/
static int rsi_mac80211_config(struct ieee80211_hw *hw,
u32 changed)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct ieee80211_conf *conf = &hw->conf;
int status = -EOPNOTSUPP;
mutex_lock(&common->mutex);
if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
status = rsi_channel_change(hw);
/* tx power */
if (changed & IEEE80211_CONF_CHANGE_POWER) {
rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
status = rsi_config_power(hw);
}
/* Power save parameters */
if (changed & IEEE80211_CONF_CHANGE_PS) {
struct ieee80211_vif *vif;
unsigned long flags;
int i, set_ps = 1;
for (i = 0; i < RSI_MAX_VIFS; i++) {
vif = adapter->vifs[i];
if (!vif)
continue;
/* Don't go to power save if AP vap exists */
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
set_ps = 0;
break;
}
}
if (set_ps) {
spin_lock_irqsave(&adapter->ps_lock, flags);
if (conf->flags & IEEE80211_CONF_PS)
rsi_enable_ps(adapter, vif);
else
rsi_disable_ps(adapter, vif);
spin_unlock_irqrestore(&adapter->ps_lock, flags);
}
}
/* RTS threshold */
if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
rsi_dbg(INFO_ZONE, "RTS threshold\n");
if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
rsi_dbg(INFO_ZONE,
"%s: Sending vap updates....\n", __func__);
status = rsi_send_vap_dynamic_update(common);
}
}
mutex_unlock(&common->mutex);
return status;
}
/**
* rsi_get_connected_channel() - This function is used to get the current
* connected channel number.
* @adapter: Pointer to the adapter structure.
*
* Return: Current connected AP's channel number is returned.
*/
u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
{
struct ieee80211_bss_conf *bss;
struct ieee80211_channel *channel;
if (!vif)
return 0;
bss = &vif->bss_conf;
channel = bss->chandef.chan;
if (!channel)
return 0;
return channel->hw_value;
}
static void rsi_switch_channel(struct rsi_hw *adapter,
struct ieee80211_vif *vif)
{
struct rsi_common *common = adapter->priv;
struct ieee80211_channel *channel;
if (common->iface_down)
return;
if (!vif)
return;
channel = vif->bss_conf.chandef.chan;
if (!channel)
return;
rsi_band_check(common, channel);
rsi_set_channel(common, channel);
rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
}
/**
* rsi_mac80211_bss_info_changed() - This function is a handler for config
* requests related to BSS parameters that
* may vary during BSS's lifespan.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
* @bss_conf: Pointer to the ieee80211_bss_conf structure.
* @changed: Changed flags set.
*
* Return: None.
*/
static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct ieee80211_bss_conf *bss = &vif->bss_conf;
struct ieee80211_conf *conf = &hw->conf;
u16 rx_filter_word = 0;
mutex_lock(&common->mutex);
if (changed & BSS_CHANGED_ASSOC) {
rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
__func__, bss_conf->assoc);
if (bss_conf->assoc) {
/* Send the RX filter frame */
rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
ALLOW_CTRL_ASSOC_PEER |
ALLOW_MGMT_ASSOC_PEER);
rsi_send_rx_filter_frame(common, rx_filter_word);
}
rsi_inform_bss_status(common,
RSI_OPMODE_STA,
bss_conf->assoc,
bss_conf->bssid,
bss_conf->qos,
bss_conf->aid,
NULL, 0, vif);
adapter->ps_info.dtim_interval_duration = bss->dtim_period;
adapter->ps_info.listen_interval = conf->listen_interval;
/* If U-APSD is updated, send ps parameters to firmware */
if (bss->assoc) {
if (common->uapsd_bitmap) {
rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
rsi_conf_uapsd(adapter, vif);
}
} else {
common->uapsd_bitmap = 0;
}
}
if (changed & BSS_CHANGED_CQM) {
common->cqm_info.last_cqm_event_rssi = 0;
common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n",
common->cqm_info.rssi_thold,
common->cqm_info.rssi_hyst);
}
if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO))) {
if (bss->enable_beacon) {
rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
common->beacon_enabled = 1;
} else {
rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
common->beacon_enabled = 0;
}
}
mutex_unlock(&common->mutex);
}
/**
* rsi_mac80211_conf_filter() - This function configure the device's RX filter.
* @hw: Pointer to the ieee80211_hw structure.
* @changed: Changed flags set.
* @total_flags: Total initial flags set.
* @multicast: Multicast.
*
* Return: None.
*/
static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
u32 changed_flags,
u32 *total_flags,
u64 multicast)
{
/* Not doing much here as of now */
*total_flags &= RSI_SUPP_FILTERS;
}
/**
* rsi_mac80211_conf_tx() - This function configures TX queue parameters
* (EDCF (aifs, cw_min, cw_max), bursting)
* for a hardware TX queue.
* @hw: Pointer to the ieee80211_hw structure
* @vif: Pointer to the ieee80211_vif structure.
* @queue: Queue number.
* @params: Pointer to ieee80211_tx_queue_params structure.
*
* Return: 0 on success, negative error code on failure.
*/
static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
u8 idx = 0;
if (queue >= IEEE80211_NUM_ACS)
return 0;
rsi_dbg(INFO_ZONE,
"%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
__func__, queue, params->aifs,
params->cw_min, params->cw_max, params->txop);
mutex_lock(&common->mutex);
/* Map into the way the f/w expects */
switch (queue) {
case IEEE80211_AC_VO:
idx = VO_Q;
break;
case IEEE80211_AC_VI:
idx = VI_Q;
break;
case IEEE80211_AC_BE:
idx = BE_Q;
break;
case IEEE80211_AC_BK:
idx = BK_Q;
break;
default:
idx = BE_Q;
break;
}
memcpy(&common->edca_params[idx],
params,
sizeof(struct ieee80211_tx_queue_params));
if (params->uapsd)
common->uapsd_bitmap |= idx;
else
common->uapsd_bitmap &= (~idx);
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_hal_key_config() - This function loads the keys into the firmware.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
* @key: Pointer to the ieee80211_key_conf structure.
*
* Return: status: 0 on success, negative error codes on failure.
*/
static int rsi_hal_key_config(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *key,
struct ieee80211_sta *sta)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_sta *rsta = NULL;
int status;
u8 key_type;
s16 sta_id = 0;
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
key_type = RSI_PAIRWISE_KEY;
else
key_type = RSI_GROUP_KEY;
rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
__func__, key->cipher, key_type, key->keylen);
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
if (sta) {
rsta = rsi_find_sta(adapter->priv, sta->addr);
if (rsta)
sta_id = rsta->sta_id;
}
adapter->priv->key = key;
} else {
if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
(key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
status = rsi_hal_load_key(adapter->priv,
key->key,
key->keylen,
RSI_PAIRWISE_KEY,
key->keyidx,
key->cipher,
sta_id,
vif);
if (status)
return status;
}
}
return rsi_hal_load_key(adapter->priv,
key->key,
key->keylen,
key_type,
key->keyidx,
key->cipher,
sta_id,
vif);
}
/**
* rsi_mac80211_set_key() - This function sets type of key to be loaded.
* @hw: Pointer to the ieee80211_hw structure.
* @cmd: enum set_key_cmd.
* @vif: Pointer to the ieee80211_vif structure.
* @sta: Pointer to the ieee80211_sta structure.
* @key: Pointer to the ieee80211_key_conf structure.
*
* Return: status: 0 on success, negative error code on failure.
*/
static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct security_info *secinfo = &common->secinfo;
int status;
mutex_lock(&common->mutex);
switch (cmd) {
case SET_KEY:
secinfo->security_enable = true;
status = rsi_hal_key_config(hw, vif, key, sta);
if (status) {
mutex_unlock(&common->mutex);
return status;
}
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
secinfo->ptk_cipher = key->cipher;
else
secinfo->gtk_cipher = key->cipher;
key->hw_key_idx = key->keyidx;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
break;
case DISABLE_KEY:
if (vif->type == NL80211_IFTYPE_STATION)
secinfo->security_enable = false;
rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
memset(key, 0, sizeof(struct ieee80211_key_conf));
status = rsi_hal_key_config(hw, vif, key, sta);
break;
default:
status = -EOPNOTSUPP;
break;
}
mutex_unlock(&common->mutex);
return status;
}
/**
* rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
* the corresponding mlme_action flag and
* informs the f/w regarding this.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
* @params: Pointer to A-MPDU action parameters
*
* Return: status: 0 on success, negative error code on failure.
*/
static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_ampdu_params *params)
{
int status = -EOPNOTSUPP;
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct rsi_sta *rsta = NULL;
u16 seq_no = 0, seq_start = 0;
u8 ii = 0;
struct ieee80211_sta *sta = params->sta;
u8 sta_id = 0;
enum ieee80211_ampdu_mlme_action action = params->action;
u16 tid = params->tid;
u16 *ssn = &params->ssn;
u8 buf_size = params->buf_size;
for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
if (vif == adapter->vifs[ii])
break;
}
mutex_lock(&common->mutex);
if (ssn != NULL)
seq_no = *ssn;
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
rsta = rsi_find_sta(common, sta->addr);
if (!rsta) {
rsi_dbg(ERR_ZONE, "No station mapped\n");
status = 0;
goto unlock;
}
sta_id = rsta->sta_id;
}
rsi_dbg(INFO_ZONE,
"%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
__func__, tid, seq_no, buf_size, sta_id);
switch (action) {
case IEEE80211_AMPDU_RX_START:
status = rsi_send_aggregation_params_frame(common,
tid,
seq_no,
buf_size,
STA_RX_ADDBA_DONE,
sta_id);
break;
case IEEE80211_AMPDU_RX_STOP:
status = rsi_send_aggregation_params_frame(common,
tid,
0,
buf_size,
STA_RX_DELBA,
sta_id);
break;
case IEEE80211_AMPDU_TX_START:
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT))
common->vif_info[ii].seq_start = seq_no;
else if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO))
rsta->seq_start[tid] = seq_no;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
status = 0;
break;
case IEEE80211_AMPDU_TX_STOP_CONT:
case IEEE80211_AMPDU_TX_STOP_FLUSH:
case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
status = rsi_send_aggregation_params_frame(common,
tid,
seq_no,
buf_size,
STA_TX_DELBA,
sta_id);
if (!status)
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT))
seq_start = common->vif_info[ii].seq_start;
else if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO))
seq_start = rsta->seq_start[tid];
status = rsi_send_aggregation_params_frame(common,
tid,
seq_start,
buf_size,
STA_TX_ADDBA_DONE,
sta_id);
break;
default:
rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
break;
}
unlock:
mutex_unlock(&common->mutex);
return status;
}
/**
* rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
* @hw: Pointer to the ieee80211_hw structure.
* @value: Rts threshold value.
*
* Return: 0 on success.
*/
static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
u32 value)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
mutex_lock(&common->mutex);
common->rts_threshold = value;
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
* @hw: Pointer to the ieee80211_hw structure
* @vif: Pointer to the ieee80211_vif structure.
* @mask: Pointer to the cfg80211_bitrate_mask structure.
*
* Return: 0 on success.
*/
static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const struct cfg80211_bitrate_mask *mask)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
enum nl80211_band band = hw->conf.chandef.chan->band;
mutex_lock(&common->mutex);
common->fixedrate_mask[band] = 0;
if (mask->control[band].legacy == 0xfff) {
common->fixedrate_mask[band] =
(mask->control[band].ht_mcs[0] << 12);
} else {
common->fixedrate_mask[band] =
mask->control[band].legacy;
}
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_perform_cqm() - This function performs cqm.
* @common: Pointer to the driver private structure.
* @bssid: pointer to the bssid.
* @rssi: RSSI value.
*/
static void rsi_perform_cqm(struct rsi_common *common,
u8 *bssid,
s8 rssi,
struct ieee80211_vif *vif)
{
s8 last_event = common->cqm_info.last_cqm_event_rssi;
int thold = common->cqm_info.rssi_thold;
u32 hyst = common->cqm_info.rssi_hyst;
enum nl80211_cqm_rssi_threshold_event event;
if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
else if (rssi > thold &&
(last_event == 0 || rssi > (last_event + hyst)))
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
else
return;
common->cqm_info.last_cqm_event_rssi = rssi;
rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
return;
}
/**
* rsi_fill_rx_status() - This function fills rx status in
* ieee80211_rx_status structure.
* @hw: Pointer to the ieee80211_hw structure.
* @skb: Pointer to the socket buffer structure.
* @common: Pointer to the driver private structure.
* @rxs: Pointer to the ieee80211_rx_status structure.
*
* Return: None.
*/
static void rsi_fill_rx_status(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct rsi_common *common,
struct ieee80211_rx_status *rxs)
{
struct rsi_hw *adapter = common->priv;
struct ieee80211_vif *vif;
struct ieee80211_bss_conf *bss = NULL;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct skb_info *rx_params = (struct skb_info *)info->driver_data;
struct ieee80211_hdr *hdr;
char rssi = rx_params->rssi;
u8 hdrlen = 0;
u8 channel = rx_params->channel;
s32 freq;
int i;
hdr = ((struct ieee80211_hdr *)(skb->data));
hdrlen = ieee80211_hdrlen(hdr->frame_control);
memset(info, 0, sizeof(struct ieee80211_tx_info));
rxs->signal = -(rssi);
rxs->band = common->band;
freq = ieee80211_channel_to_frequency(channel, rxs->band);
if (freq)
rxs->freq = freq;
if (ieee80211_has_protected(hdr->frame_control)) {
if (rsi_is_cipher_wep(common)) {
memmove(skb->data + 4, skb->data, hdrlen);
skb_pull(skb, 4);
} else {
memmove(skb->data + 8, skb->data, hdrlen);
skb_pull(skb, 8);
rxs->flag |= RX_FLAG_MMIC_STRIPPED;
}
rxs->flag |= RX_FLAG_DECRYPTED;
rxs->flag |= RX_FLAG_IV_STRIPPED;
}
for (i = 0; i < RSI_MAX_VIFS; i++) {
vif = adapter->vifs[i];
if (!vif)
continue;
if (vif->type == NL80211_IFTYPE_STATION) {
bss = &vif->bss_conf;
break;
}
}
if (!bss)
return;
/* CQM only for connected AP beacons, the RSSI is a weighted avg */
if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
if (ieee80211_is_beacon(hdr->frame_control))
rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
}
return;
}
/**
* rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211.
* @common: Pointer to the driver private structure.
* @skb: Pointer to the socket buffer structure.
*
* Return: None.
*/
void rsi_indicate_pkt_to_os(struct rsi_common *common,
struct sk_buff *skb)
{
struct rsi_hw *adapter = common->priv;
struct ieee80211_hw *hw = adapter->hw;
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
if ((common->iface_down) || (!adapter->sc_nvifs)) {
dev_kfree_skb(skb);
return;
}
/* filling in the ieee80211_rx_status flags */
rsi_fill_rx_status(hw, skb, common, rx_status);
ieee80211_rx_irqsafe(hw, skb);
}
static void rsi_set_min_rate(struct ieee80211_hw *hw,
struct ieee80211_sta *sta,
struct rsi_common *common)
{
u8 band = hw->conf.chandef.chan->band;
u8 ii;
u32 rate_bitmap;
bool matched = false;
common->bitrate_mask[band] = sta->supp_rates[band];
rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
if (rate_bitmap & 0xfff) {
/* Find out the min rate */
for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
if (rate_bitmap & BIT(ii)) {
common->min_rate = rsi_rates[ii].hw_value;
matched = true;
break;
}
}
}
common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
if ((rate_bitmap >> 12) & BIT(ii)) {
common->min_rate = rsi_mcsrates[ii];
matched = true;
break;
}
}
}
if (!matched)
common->min_rate = 0xffff;
}
/**
* rsi_mac80211_sta_add() - This function notifies driver about a peer getting
* connected.
* @hw: pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
* @sta: Pointer to the ieee80211_sta structure.
*
* Return: 0 on success, negative error codes on failure.
*/
static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
bool sta_exist = false;
struct rsi_sta *rsta;
int status = 0;
rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
mutex_lock(&common->mutex);
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
u8 cnt;
int sta_idx = -1;
int free_index = -1;
/* Check if max stations reached */
if (common->num_stations >= common->max_stations) {
rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
status = -EOPNOTSUPP;
goto unlock;
}
for (cnt = 0; cnt < common->max_stations; cnt++) {
rsta = &common->stations[cnt];
if (!rsta->sta) {
if (free_index < 0)
free_index = cnt;
continue;
}
if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
rsi_dbg(INFO_ZONE, "Station exists\n");
sta_idx = cnt;
sta_exist = true;
break;
}
}
if (!sta_exist) {
if (free_index >= 0)
sta_idx = free_index;
}
if (sta_idx < 0) {
rsi_dbg(ERR_ZONE,
"%s: Some problem reaching here...\n",
__func__);
status = -EINVAL;
goto unlock;
}
rsta = &common->stations[sta_idx];
rsta->sta = sta;
rsta->sta_id = sta_idx;
for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
rsta->start_tx_aggr[cnt] = false;
for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
rsta->seq_start[cnt] = 0;
if (!sta_exist) {
rsi_dbg(INFO_ZONE, "New Station\n");
/* Send peer notify to device */
rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
sta->addr, sta->wme, sta->aid,
sta, sta_idx, vif);
if (common->key) {
struct ieee80211_key_conf *key = common->key;
if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
(key->cipher == WLAN_CIPHER_SUITE_WEP40))
rsi_hal_load_key(adapter->priv,
key->key,
key->keylen,
RSI_PAIRWISE_KEY,
key->keyidx,
key->cipher,
sta_idx,
vif);
}
common->num_stations++;
}
}
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
rsi_set_min_rate(hw, sta, common);
if (sta->ht_cap.ht_supported) {
common->vif_info[0].is_ht = true;
common->bitrate_mask[NL80211_BAND_2GHZ] =
sta->supp_rates[NL80211_BAND_2GHZ];
if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
(sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
common->vif_info[0].sgi = true;
ieee80211_start_tx_ba_session(sta, 0, 0);
}
}
unlock:
mutex_unlock(&common->mutex);
return status;
}
/**
* rsi_mac80211_sta_remove() - This function notifies driver about a peer
* getting disconnected.
* @hw: Pointer to the ieee80211_hw structure.
* @vif: Pointer to the ieee80211_vif structure.
* @sta: Pointer to the ieee80211_sta structure.
*
* Return: 0 on success, negative error codes on failure.
*/
static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
struct ieee80211_bss_conf *bss = &vif->bss_conf;
struct rsi_sta *rsta;
rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
mutex_lock(&common->mutex);
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
u8 sta_idx, cnt;
/* Send peer notify to device */
rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
rsta = &common->stations[sta_idx];
if (!rsta->sta)
continue;
if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
sta->addr, sta->wme,
sta->aid, sta, sta_idx,
vif);
rsta->sta = NULL;
rsta->sta_id = -1;
for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
rsta->start_tx_aggr[cnt] = false;
if (common->num_stations > 0)
common->num_stations--;
break;
}
}
if (sta_idx >= common->max_stations)
rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
}
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
/* Resetting all the fields to default values */
memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
bss->qos = sta->wme;
common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
common->min_rate = 0xffff;
common->vif_info[0].is_ht = false;
common->vif_info[0].sgi = false;
common->vif_info[0].seq_start = 0;
common->secinfo.ptk_cipher = 0;
common->secinfo.gtk_cipher = 0;
if (!common->iface_down)
rsi_send_rx_filter_frame(common, 0);
}
mutex_unlock(&common->mutex);
return 0;
}
/**
* rsi_mac80211_set_antenna() - This function is used to configure
* tx and rx antennas.
* @hw: Pointer to the ieee80211_hw structure.
* @tx_ant: Bitmap for tx antenna
* @rx_ant: Bitmap for rx antenna
*
* Return: 0 on success, Negative error code on failure.
*/
static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
u32 tx_ant, u32 rx_ant)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
u8 antenna = 0;
if (tx_ant > 1 || rx_ant > 1) {
rsi_dbg(ERR_ZONE,
"Invalid antenna selection (tx: %d, rx:%d)\n",
tx_ant, rx_ant);
rsi_dbg(ERR_ZONE,
"Use 0 for int_ant, 1 for ext_ant\n");
return -EINVAL;
}
rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
__func__, tx_ant, rx_ant);
mutex_lock(&common->mutex);
antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
if (common->ant_in_use != antenna)
if (rsi_set_antenna(common, antenna))
goto fail_set_antenna;
rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
tx_ant ? "UFL" : "INT");
common->ant_in_use = antenna;
mutex_unlock(&common->mutex);
return 0;
fail_set_antenna:
rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
mutex_unlock(&common->mutex);
return -EINVAL;
}
/**
* rsi_mac80211_get_antenna() - This function is used to configure
* tx and rx antennas.
*
* @hw: Pointer to the ieee80211_hw structure.
* @tx_ant: Bitmap for tx antenna
* @rx_ant: Bitmap for rx antenna
*
* Return: 0 on success, negative error codes on failure.
*/
static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
u32 *tx_ant, u32 *rx_ant)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
mutex_lock(&common->mutex);
*tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
*rx_ant = 0;
mutex_unlock(&common->mutex);
return 0;
}
static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
{
switch (region_code) {
case NL80211_DFS_FCC:
return RSI_REGION_FCC;
case NL80211_DFS_ETSI:
return RSI_REGION_ETSI;
case NL80211_DFS_JP:
return RSI_REGION_TELEC;
case NL80211_DFS_UNSET:
return RSI_REGION_WORLD;
}
return RSI_REGION_WORLD;
}
static void rsi_reg_notify(struct wiphy *wiphy,
struct regulatory_request *request)
{
struct ieee80211_supported_band *sband;
struct ieee80211_channel *ch;
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct rsi_hw * adapter = hw->priv;
struct rsi_common *common = adapter->priv;
int i;
mutex_lock(&common->mutex);
rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
request->alpha2, request->dfs_region);
if (common->num_supp_bands > 1) {
sband = wiphy->bands[NL80211_BAND_5GHZ];
for (i = 0; i < sband->n_channels; i++) {
ch = &sband->channels[i];
if (ch->flags & IEEE80211_CHAN_DISABLED)
continue;
if (ch->flags & IEEE80211_CHAN_RADAR)
ch->flags |= IEEE80211_CHAN_NO_IR;
}
}
adapter->dfs_region = rsi_map_region_code(request->dfs_region);
rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
adapter->country[0] = request->alpha2[0];
adapter->country[1] = request->alpha2[1];
mutex_unlock(&common->mutex);
}
static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
mutex_lock(&common->mutex);
if (common->fsm_state != FSM_MAC_INIT_DONE)
wiphy_rfkill_set_hw_state(hw->wiphy, true);
else
wiphy_rfkill_set_hw_state(hw->wiphy, false);
mutex_unlock(&common->mutex);
}
static void rsi_resume_conn_channel(struct rsi_common *common)
{
struct rsi_hw *adapter = common->priv;
struct ieee80211_vif *vif;
int cnt;
for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
vif = adapter->vifs[cnt];
if (!vif)
continue;
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
rsi_switch_channel(adapter, vif);
break;
}
if (((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
vif->bss_conf.assoc) {
rsi_switch_channel(adapter, vif);
break;
}
}
}
void rsi_roc_timeout(struct timer_list *t)
{
struct rsi_common *common = from_timer(common, t, roc_timer);
rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
mutex_lock(&common->mutex);
ieee80211_remain_on_channel_expired(common->priv->hw);
if (timer_pending(&common->roc_timer))
del_timer(&common->roc_timer);
rsi_resume_conn_channel(common);
mutex_unlock(&common->mutex);
}
static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_channel *chan, int duration,
enum ieee80211_roc_type type)
{
struct rsi_hw *adapter = (struct rsi_hw *)hw->priv;
struct rsi_common *common = (struct rsi_common *)adapter->priv;
int status = 0;
rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
mutex_lock(&common->mutex);
rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
__func__, chan->hw_value, duration);
if (timer_pending(&common->roc_timer)) {
rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
del_timer(&common->roc_timer);
}
common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
add_timer(&common->roc_timer);
/* Configure band */
if (rsi_band_check(common, chan)) {
rsi_dbg(ERR_ZONE, "Failed to set band\n");
status = -EINVAL;
goto out;
}
/* Configure channel */
if (rsi_set_channel(common, chan)) {
rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
status = -EINVAL;
goto out;
}
common->roc_vif = vif;
ieee80211_ready_on_channel(hw);
rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
__func__, chan->hw_value);
out:
mutex_unlock(&common->mutex);
return status;
}
static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
mutex_lock(&common->mutex);
if (!timer_pending(&common->roc_timer)) {
mutex_unlock(&common->mutex);
return 0;
}
del_timer(&common->roc_timer);
rsi_resume_conn_channel(common);
mutex_unlock(&common->mutex);
return 0;
}
#ifdef CONFIG_PM
static const struct wiphy_wowlan_support rsi_wowlan_support = {
.flags = WIPHY_WOWLAN_ANY |
WIPHY_WOWLAN_MAGIC_PKT |
WIPHY_WOWLAN_DISCONNECT |
WIPHY_WOWLAN_GTK_REKEY_FAILURE |
WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
WIPHY_WOWLAN_EAP_IDENTITY_REQ |
WIPHY_WOWLAN_4WAY_HANDSHAKE,
};
static u16 rsi_wow_map_triggers(struct rsi_common *common,
struct cfg80211_wowlan *wowlan)
{
u16 wow_triggers = 0;
rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
if (wowlan->any)
wow_triggers |= RSI_WOW_ANY;
if (wowlan->magic_pkt)
wow_triggers |= RSI_WOW_MAGIC_PKT;
if (wowlan->disconnect)
wow_triggers |= RSI_WOW_DISCONNECT;
if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
wowlan->four_way_handshake)
wow_triggers |= RSI_WOW_GTK_REKEY;
return wow_triggers;
}
int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
{
struct rsi_common *common = adapter->priv;
u16 triggers = 0;
u16 rx_filter_word = 0;
struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf;
rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
if (WARN_ON(!wowlan)) {
rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
return -EINVAL;
}
triggers = rsi_wow_map_triggers(common, wowlan);
if (!triggers) {
rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
return -EINVAL;
}
if (!bss->assoc) {
rsi_dbg(ERR_ZONE,
"Cannot configure WoWLAN (Station not connected)\n");
common->wow_flags |= RSI_WOW_NO_CONNECTION;
return 0;
}
rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
rsi_send_wowlan_request(common, triggers, 1);
/**
* Increase the beacon_miss threshold & keep-alive timers in
* vap_update frame
*/
rsi_send_vap_dynamic_update(common);
rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
rsi_send_rx_filter_frame(common, rx_filter_word);
common->wow_flags |= RSI_WOW_ENABLED;
return 0;
}
EXPORT_SYMBOL(rsi_config_wowlan);
static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
struct cfg80211_wowlan *wowlan)
{
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
mutex_lock(&common->mutex);
if (rsi_config_wowlan(adapter, wowlan)) {
rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
mutex_unlock(&common->mutex);
return 1;
}
mutex_unlock(&common->mutex);
return 0;
}
static int rsi_mac80211_resume(struct ieee80211_hw *hw)
{
u16 rx_filter_word = 0;
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
common->wow_flags = 0;
rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
if (common->hibernate_resume)
return 0;
mutex_lock(&common->mutex);
rsi_send_wowlan_request(common, 0, 0);
rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
ALLOW_MGMT_ASSOC_PEER);
rsi_send_rx_filter_frame(common, rx_filter_word);
mutex_unlock(&common->mutex);
return 0;
}
#endif
static const struct ieee80211_ops mac80211_ops = {
.tx = rsi_mac80211_tx,
.start = rsi_mac80211_start,
.stop = rsi_mac80211_stop,
.add_interface = rsi_mac80211_add_interface,
.remove_interface = rsi_mac80211_remove_interface,
.config = rsi_mac80211_config,
.bss_info_changed = rsi_mac80211_bss_info_changed,
.conf_tx = rsi_mac80211_conf_tx,
.configure_filter = rsi_mac80211_conf_filter,
.set_key = rsi_mac80211_set_key,
.set_rts_threshold = rsi_mac80211_set_rts_threshold,
.set_bitrate_mask = rsi_mac80211_set_rate_mask,
.ampdu_action = rsi_mac80211_ampdu_action,
.sta_add = rsi_mac80211_sta_add,
.sta_remove = rsi_mac80211_sta_remove,
.set_antenna = rsi_mac80211_set_antenna,
.get_antenna = rsi_mac80211_get_antenna,
.rfkill_poll = rsi_mac80211_rfkill_poll,
.remain_on_channel = rsi_mac80211_roc,
.cancel_remain_on_channel = rsi_mac80211_cancel_roc,
#ifdef CONFIG_PM
.suspend = rsi_mac80211_suspend,
.resume = rsi_mac80211_resume,
#endif
};
/**
* rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
* @common: Pointer to the driver private structure.
*
* Return: 0 on success, negative error codes on failure.
*/
int rsi_mac80211_attach(struct rsi_common *common)
{
int status = 0;
struct ieee80211_hw *hw = NULL;
struct wiphy *wiphy = NULL;
struct rsi_hw *adapter = common->priv;
u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
if (!hw) {
rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
return -ENOMEM;
}
wiphy = hw->wiphy;
SET_IEEE80211_DEV(hw, adapter->device);
hw->priv = adapter;
adapter->hw = hw;
ieee80211_hw_set(hw, SIGNAL_DBM);
ieee80211_hw_set(hw, HAS_RATE_CONTROL);
ieee80211_hw_set(hw, AMPDU_AGGREGATION);
ieee80211_hw_set(hw, SUPPORTS_PS);
ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
hw->queues = MAX_HW_QUEUES;
hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
hw->max_rates = 1;
hw->max_rate_tries = MAX_RETRIES;
hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
hw->max_tx_aggregation_subframes = 6;
rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
rsi_register_rates_channels(adapter, NL80211_BAND_5GHZ);
hw->rate_control_algorithm = "AARF";
SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_P2P_DEVICE) |
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO);
wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
wiphy->retry_short = RETRY_SHORT;
wiphy->retry_long = RETRY_LONG;
wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
wiphy->flags = 0;
wiphy->available_antennas_rx = 1;
wiphy->available_antennas_tx = 1;
wiphy->bands[NL80211_BAND_2GHZ] =
&adapter->sbands[NL80211_BAND_2GHZ];
wiphy->bands[NL80211_BAND_5GHZ] =
&adapter->sbands[NL80211_BAND_5GHZ];
/* AP Parameters */
wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
common->max_stations = wiphy->max_ap_assoc_sta;
rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
hw->sta_data_size = sizeof(struct rsi_sta);
wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
wiphy->reg_notifier = rsi_reg_notify;
#ifdef CONFIG_PM
wiphy->wowlan = &rsi_wowlan_support;
#endif
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
/* Wi-Fi direct parameters */
wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
wiphy->max_remain_on_channel_duration = 10000;
hw->max_listen_interval = 10;
wiphy->iface_combinations = rsi_iface_combinations;
wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
status = ieee80211_register_hw(hw);
if (status)
return status;
return rsi_init_dbgfs(adapter);
}