/**
* 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_common.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
};
/**
* 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;
mutex_lock(&common->mutex);
common->iface_down = false;
mutex_unlock(&common->mutex);
rsi_send_rx_filter_frame(common, 0);
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;
mutex_lock(&common->mutex);
common->iface_down = true;
mutex_unlock(&common->mutex);
}
/**
* 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;
int ret = -EOPNOTSUPP;
mutex_lock(&common->mutex);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
if (!adapter->sc_nvifs) {
++adapter->sc_nvifs;
adapter->vifs[0] = vif;
ret = rsi_set_vap_capabilities(common,
STA_OPMODE,
VAP_ADD);
}
break;
default:
rsi_dbg(ERR_ZONE,
"%s: Interface type %d not supported\n", __func__,
vif->type);
}
mutex_unlock(&common->mutex);
return ret;
}
/**
* 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;
mutex_lock(&common->mutex);
if (vif->type == NL80211_IFTYPE_STATION) {
adapter->sc_nvifs--;
rsi_set_vap_capabilities(common, STA_OPMODE, VAP_DELETE);
}
if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif)))
adapter->vifs[0] = 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_bss_conf *bss = &adapter->vifs[0]->bss_conf;
rsi_dbg(INFO_ZONE,
"%s: Set channel: %d MHz type: %d channel_no %d\n",
__func__, curchan->center_freq,
curchan->flags, channel);
if (bss->assoc) {
if (!common->hw_data_qs_blocked &&
(rsi_get_connected_channel(adapter) != 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);
if (!status)
status = rsi_set_channel(adapter->priv, curchan);
if (bss->assoc) {
if (common->hw_data_qs_blocked &&
(rsi_get_connected_channel(adapter) == 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;
}
} else {
if (common->hw_data_qs_blocked) {
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;
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);
}
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 rsi_hw *adapter)
{
struct ieee80211_vif *vif = adapter->vifs[0];
if (vif) {
struct ieee80211_bss_conf *bss = &vif->bss_conf;
struct ieee80211_channel *channel = bss->chandef.chan;
return channel->hw_value;
}
return 0;
}
/**
* 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;
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,
bss_conf->assoc,
bss_conf->bssid,
bss_conf->qos,
bss_conf->aid);
}
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);
}
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));
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, -1 on failure.
*/
static int rsi_hal_key_config(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *key)
{
struct rsi_hw *adapter = hw->priv;
int status;
u8 key_type;
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 ((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);
if (status)
return status;
}
return rsi_hal_load_key(adapter->priv,
key->key,
key->keylen,
key_type,
key->keyidx,
key->cipher);
}
/**
* 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);
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:
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);
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;
u16 seq_no = 0;
u8 ii = 0;
struct ieee80211_sta *sta = params->sta;
enum ieee80211_ampdu_mlme_action action = params->action;
u16 tid = params->tid;
u16 *ssn = ¶ms->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);
rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action);
if (ssn != NULL)
seq_no = *ssn;
switch (action) {
case IEEE80211_AMPDU_RX_START:
status = rsi_send_aggregation_params_frame(common,
tid,
seq_no,
buf_size,
STA_RX_ADDBA_DONE);
break;
case IEEE80211_AMPDU_RX_STOP:
status = rsi_send_aggregation_params_frame(common,
tid,
0,
buf_size,
STA_RX_DELBA);
break;
case IEEE80211_AMPDU_TX_START:
common->vif_info[ii].seq_start = 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);
if (!status)
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
status = rsi_send_aggregation_params_frame(common,
tid,
common->vif_info[ii]
.seq_start,
buf_size,
STA_TX_ADDBA_DONE);
break;
default:
rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__);
break;
}
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 rsi_hw *adapter = common->priv;
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(adapter->vifs[0], 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 ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf;
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;
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;
}
/* 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);
}
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, -1 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;
mutex_lock(&common->mutex);
rsi_set_min_rate(hw, sta, common);
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;
}
if (sta->ht_cap.ht_supported)
ieee80211_start_tx_ba_session(sta, 0, 0);
mutex_unlock(&common->mutex);
return 0;
}
/**
* 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, -1 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;
mutex_lock(&common->mutex);
/* Resetting all the fields to default values */
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;
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, -1 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 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;
int i;
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;
}
rsi_dbg(INFO_ZONE,
"country = %s dfs_region = %d\n",
request->alpha2, request->dfs_region);
adapter->dfs_region = request->dfs_region;
}
static 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,
};
/**
* rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
* @common: Pointer to the driver private structure.
*
* Return: 0 on success, -1 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);
hw->queues = MAX_HW_QUEUES;
hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
hw->max_rates = 1;
hw->max_rate_tries = MAX_RETRIES;
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);
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];
wiphy->reg_notifier = rsi_reg_notify;
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
status = ieee80211_register_hw(hw);
if (status)
return status;
return rsi_init_dbgfs(adapter);
}
