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Commit 6e809a16 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
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iwlagn: move scan code to scan file 

Since the driver split there's no longer a need
to have the scan code scattered across multiple
files, so move it all back to iwl-scan.c
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarWey-Yi Guy <wey-yi.guy@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent ba4a14e1
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Inline Side-by-side
Showing with 433 additions and 440 deletions
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View file @ 6e809a16
......@@ -190,433 +190,6 @@ int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
return -1;
}
static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
struct ieee80211_vif *vif,
enum ieee80211_band band,
struct iwl_scan_channel *scan_ch)
{
const struct ieee80211_supported_band *sband;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added = 0;
u16 channel = 0;
sband = iwl_get_hw_mode(priv, band);
if (!sband) {
IWL_ERR(priv, "invalid band\n");
return added;
}
active_dwell = iwl_get_active_dwell_time(priv, band, 0);
passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
channel = iwl_get_single_channel_number(priv, band);
if (channel) {
scan_ch->channel = cpu_to_le16(channel);
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
if (band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
added++;
} else
IWL_ERR(priv, "no valid channel found\n");
return added;
}
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
struct ieee80211_vif *vif,
enum ieee80211_band band,
u8 is_active, u8 n_probes,
struct iwl_scan_channel *scan_ch)
{
struct ieee80211_channel *chan;
const struct ieee80211_supported_band *sband;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
u16 channel;
sband = iwl_get_hw_mode(priv, band);
if (!sband)
return 0;
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
chan = priv->scan_request->channels[i];
if (chan->band != band)
continue;
channel = chan->hw_value;
scan_ch->channel = cpu_to_le16(channel);
ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
(chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
if (n_probes)
scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
channel, le32_to_cpu(scan_ch->type),
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
"ACTIVE" : "PASSIVE",
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
active_dwell : passive_dwell);
scan_ch++;
added++;
}
IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
return added;
}
int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
{
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_CMD,
.len = { sizeof(struct iwl_scan_cmd), },
.flags = CMD_SYNC,
};
struct iwl_scan_cmd *scan;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
u32 rate_flags = 0;
u16 cmd_len;
u16 rx_chain = 0;
enum ieee80211_band band;
u8 n_probes = 0;
u8 rx_ant = hw_params(priv).valid_rx_ant;
u8 rate;
bool is_active = false;
int chan_mod;
u8 active_chains;
u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
int ret;
lockdep_assert_held(&priv->shrd->mutex);
if (vif)
ctx = iwl_rxon_ctx_from_vif(vif);
if (!priv->scan_cmd) {
priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan_cmd) {
IWL_DEBUG_SCAN(priv,
"fail to allocate memory for scan\n");
return -ENOMEM;
}
}
scan = priv->scan_cmd;
memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
if (priv->scan_type != IWL_SCAN_ROC &&
iwl_is_any_associated(priv)) {
u16 interval = 0;
u32 extra;
u32 suspend_time = 100;
u32 scan_suspend_time = 100;
IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
switch (priv->scan_type) {
case IWL_SCAN_ROC:
WARN_ON(1);
break;
case IWL_SCAN_RADIO_RESET:
interval = 0;
break;
case IWL_SCAN_NORMAL:
interval = vif->bss_conf.beacon_int;
break;
}
scan->suspend_time = 0;
scan->max_out_time = cpu_to_le32(200 * 1024);
if (!interval)
interval = suspend_time;
extra = (suspend_time / interval) << 22;
scan_suspend_time = (extra |
((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
} else if (priv->scan_type == IWL_SCAN_ROC) {
scan->suspend_time = 0;
scan->max_out_time = 0;
scan->quiet_time = 0;
scan->quiet_plcp_th = 0;
}
switch (priv->scan_type) {
case IWL_SCAN_RADIO_RESET:
IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
break;
case IWL_SCAN_NORMAL:
if (priv->scan_request->n_ssids) {
int i, p = 0;
IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
for (i = 0; i < priv->scan_request->n_ssids; i++) {
/* always does wildcard anyway */
if (!priv->scan_request->ssids[i].ssid_len)
continue;
scan->direct_scan[p].id = WLAN_EID_SSID;
scan->direct_scan[p].len =
priv->scan_request->ssids[i].ssid_len;
memcpy(scan->direct_scan[p].ssid,
priv->scan_request->ssids[i].ssid,
priv->scan_request->ssids[i].ssid_len);
n_probes++;
p++;
}
is_active = true;
} else
IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
break;
case IWL_SCAN_ROC:
IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
break;
}
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = ctx->bcast_sta_id;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
switch (priv->scan_band) {
case IEEE80211_BAND_2GHZ:
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
chan_mod = le32_to_cpu(
priv->contexts[IWL_RXON_CTX_BSS].active.flags &
RXON_FLG_CHANNEL_MODE_MSK)
>> RXON_FLG_CHANNEL_MODE_POS;
if (chan_mod == CHANNEL_MODE_PURE_40) {
rate = IWL_RATE_6M_PLCP;
} else {
rate = IWL_RATE_1M_PLCP;
rate_flags = RATE_MCS_CCK_MSK;
}
/*
* Internal scans are passive, so we can indiscriminately set
* the BT ignore flag on 2.4 GHz since it applies to TX only.
*/
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist)
scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
break;
case IEEE80211_BAND_5GHZ:
rate = IWL_RATE_6M_PLCP;
break;
default:
IWL_WARN(priv, "Invalid scan band\n");
return -EIO;
}
/*
* If active scanning is requested but a certain channel is
* marked passive, we can do active scanning if we detect
* transmissions.
*
* There is an issue with some firmware versions that triggers
* a sysassert on a "good CRC threshold" of zero (== disabled),
* on a radar channel even though this means that we should NOT
* send probes.
*
* The "good CRC threshold" is the number of frames that we
* need to receive during our dwell time on a channel before
* sending out probes -- setting this to a huge value will
* mean we never reach it, but at the same time work around
* the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
* here instead of IWL_GOOD_CRC_TH_DISABLED.
*
* This was fixed in later versions along with some other
* scan changes, and the threshold behaves as a flag in those
* versions.
*/
if (priv->new_scan_threshold_behaviour)
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
IWL_GOOD_CRC_TH_DISABLED;
else
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
IWL_GOOD_CRC_TH_NEVER;
band = priv->scan_band;
if (priv->cfg->scan_rx_antennas[band])
rx_ant = priv->cfg->scan_rx_antennas[band];
if (band == IEEE80211_BAND_2GHZ &&
priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist) {
/* transmit 2.4 GHz probes only on first antenna */
scan_tx_antennas = first_antenna(scan_tx_antennas);
}
priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
scan_tx_antennas);
rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
/* In power save mode use one chain, otherwise use all chains */
if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
/* rx_ant has been set to all valid chains previously */
active_chains = rx_ant &
((u8)(priv->chain_noise_data.active_chains));
if (!active_chains)
active_chains = rx_ant;
IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
priv->chain_noise_data.active_chains);
rx_ant = first_antenna(active_chains);
}
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist &&
priv->bt_full_concurrent) {
/* operated as 1x1 in full concurrency mode */
rx_ant = first_antenna(rx_ant);
}
/* MIMO is not used here, but value is required */
rx_chain |=
hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
scan->rx_chain = cpu_to_le16(rx_chain);
switch (priv->scan_type) {
case IWL_SCAN_NORMAL:
cmd_len = iwl_fill_probe_req(priv,
(struct ieee80211_mgmt *)scan->data,
vif->addr,
priv->scan_request->ie,
priv->scan_request->ie_len,
IWL_MAX_SCAN_SIZE - sizeof(*scan));
break;
case IWL_SCAN_RADIO_RESET:
case IWL_SCAN_ROC:
/* use bcast addr, will not be transmitted but must be valid */
cmd_len = iwl_fill_probe_req(priv,
(struct ieee80211_mgmt *)scan->data,
iwl_bcast_addr, NULL, 0,
IWL_MAX_SCAN_SIZE - sizeof(*scan));
break;
default:
BUG();
}
scan->tx_cmd.len = cpu_to_le16(cmd_len);
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
RXON_FILTER_BCON_AWARE_MSK);
switch (priv->scan_type) {
case IWL_SCAN_RADIO_RESET:
scan->channel_count =
iwl_get_single_channel_for_scan(priv, vif, band,
(void *)&scan->data[cmd_len]);
break;
case IWL_SCAN_NORMAL:
scan->channel_count =
iwl_get_channels_for_scan(priv, vif, band,
is_active, n_probes,
(void *)&scan->data[cmd_len]);
break;
case IWL_SCAN_ROC: {
struct iwl_scan_channel *scan_ch;
scan->channel_count = 1;
scan_ch = (void *)&scan->data[cmd_len];
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
scan_ch->channel =
cpu_to_le16(priv->hw_roc_channel->hw_value);
scan_ch->active_dwell =
scan_ch->passive_dwell =
cpu_to_le16(priv->hw_roc_duration);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
}
break;
}
if (scan->channel_count == 0) {
IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
return -EIO;
}
cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct iwl_scan_channel);
cmd.data[0] = scan;
cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
scan->len = cpu_to_le16(cmd.len[0]);
/* set scan bit here for PAN params */
set_bit(STATUS_SCAN_HW, &priv->shrd->status);
ret = iwlagn_set_pan_params(priv);
if (ret)
return ret;
ret = iwl_trans_send_cmd(trans(priv), &cmd);
if (ret) {
clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
iwlagn_set_pan_params(priv);
}
return ret;
}
int iwlagn_manage_ibss_station(struct iwl_priv *priv,
struct ieee80211_vif *vif, bool add)
{
......
drivers/net/wireless/iwlwifi/iwl-agn.h
View file @ 6e809a16
......@@ -146,7 +146,6 @@ static inline bool iwl_is_tx_success(u32 status)
u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant_idx, u8 valid);
/* scan */
int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif);
void iwlagn_post_scan(struct iwl_priv *priv);
void iwlagn_disable_roc(struct iwl_priv *priv);
......
drivers/net/wireless/iwlwifi/iwl-core.h
View file @ 6e809a16
......@@ -330,12 +330,6 @@ int iwl_force_reset(struct iwl_priv *priv, int mode, bool external);
u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
const u8 *ta, const u8 *ie, int ie_len, int left);
void iwl_setup_rx_scan_handlers(struct iwl_priv *priv);
u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band,
u8 n_probes);
u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band,
struct ieee80211_vif *vif);
void iwl_setup_scan_deferred_work(struct iwl_priv *priv);
void iwl_cancel_scan_deferred_work(struct iwl_priv *priv);
int __must_check iwl_scan_initiate(struct iwl_priv *priv,
......
drivers/net/wireless/iwlwifi/iwl-scan.c
View file @ 6e809a16
......@@ -299,9 +299,8 @@ void iwl_setup_rx_scan_handlers(struct iwl_priv *priv)
iwl_rx_scan_complete_notif;
}
inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band,
u8 n_probes)
static u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band, u8 n_probes)
{
if (band == IEEE80211_BAND_5GHZ)
return IWL_ACTIVE_DWELL_TIME_52 +
......@@ -311,9 +310,8 @@ inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
}
u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band,
struct ieee80211_vif *vif)
static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
enum ieee80211_band band)
{
struct iwl_rxon_context *ctx;
u16 passive = (band == IEEE80211_BAND_2GHZ) ?
......@@ -342,6 +340,435 @@ u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
return passive;
}
static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
struct ieee80211_vif *vif,
enum ieee80211_band band,
struct iwl_scan_channel *scan_ch)
{
const struct ieee80211_supported_band *sband;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added = 0;
u16 channel = 0;
sband = iwl_get_hw_mode(priv, band);
if (!sband) {
IWL_ERR(priv, "invalid band\n");
return added;
}
active_dwell = iwl_get_active_dwell_time(priv, band, 0);
passive_dwell = iwl_get_passive_dwell_time(priv, band);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
channel = iwl_get_single_channel_number(priv, band);
if (channel) {
scan_ch->channel = cpu_to_le16(channel);
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
if (band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
added++;
} else
IWL_ERR(priv, "no valid channel found\n");
return added;
}
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
struct ieee80211_vif *vif,
enum ieee80211_band band,
u8 is_active, u8 n_probes,
struct iwl_scan_channel *scan_ch)
{
struct ieee80211_channel *chan;
const struct ieee80211_supported_band *sband;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
u16 channel;
sband = iwl_get_hw_mode(priv, band);
if (!sband)
return 0;
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
passive_dwell = iwl_get_passive_dwell_time(priv, band);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
chan = priv->scan_request->channels[i];
if (chan->band != band)
continue;
channel = chan->hw_value;
scan_ch->channel = cpu_to_le16(channel);
ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN(priv,
"Channel %d is INVALID for this band.\n",
channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
(chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
if (n_probes)
scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
channel, le32_to_cpu(scan_ch->type),
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
"ACTIVE" : "PASSIVE",
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
active_dwell : passive_dwell);
scan_ch++;
added++;
}
IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
return added;
}
static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
{
struct iwl_host_cmd cmd = {
.id = REPLY_SCAN_CMD,
.len = { sizeof(struct iwl_scan_cmd), },
.flags = CMD_SYNC,
};
struct iwl_scan_cmd *scan;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
u32 rate_flags = 0;
u16 cmd_len;
u16 rx_chain = 0;
enum ieee80211_band band;
u8 n_probes = 0;
u8 rx_ant = hw_params(priv).valid_rx_ant;
u8 rate;
bool is_active = false;
int chan_mod;
u8 active_chains;
u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
int ret;
lockdep_assert_held(&priv->shrd->mutex);
if (vif)
ctx = iwl_rxon_ctx_from_vif(vif);
if (!priv->scan_cmd) {
priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
if (!priv->scan_cmd) {
IWL_DEBUG_SCAN(priv,
"fail to allocate memory for scan\n");
return -ENOMEM;
}
}
scan = priv->scan_cmd;
memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
if (priv->scan_type != IWL_SCAN_ROC &&
iwl_is_any_associated(priv)) {
u16 interval = 0;
u32 extra;
u32 suspend_time = 100;
u32 scan_suspend_time = 100;
IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
switch (priv->scan_type) {
case IWL_SCAN_ROC:
WARN_ON(1);
break;
case IWL_SCAN_RADIO_RESET:
interval = 0;
break;
case IWL_SCAN_NORMAL:
interval = vif->bss_conf.beacon_int;
break;
}
scan->suspend_time = 0;
scan->max_out_time = cpu_to_le32(200 * 1024);
if (!interval)
interval = suspend_time;
extra = (suspend_time / interval) << 22;
scan_suspend_time = (extra |
((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
} else if (priv->scan_type == IWL_SCAN_ROC) {
scan->suspend_time = 0;
scan->max_out_time = 0;
scan->quiet_time = 0;
scan->quiet_plcp_th = 0;
}
switch (priv->scan_type) {
case IWL_SCAN_RADIO_RESET:
IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
break;
case IWL_SCAN_NORMAL:
if (priv->scan_request->n_ssids) {
int i, p = 0;
IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
for (i = 0; i < priv->scan_request->n_ssids; i++) {
/* always does wildcard anyway */
if (!priv->scan_request->ssids[i].ssid_len)
continue;
scan->direct_scan[p].id = WLAN_EID_SSID;
scan->direct_scan[p].len =
priv->scan_request->ssids[i].ssid_len;
memcpy(scan->direct_scan[p].ssid,
priv->scan_request->ssids[i].ssid,
priv->scan_request->ssids[i].ssid_len);
n_probes++;
p++;
}
is_active = true;
} else
IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
break;
case IWL_SCAN_ROC:
IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
break;
}
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = ctx->bcast_sta_id;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
switch (priv->scan_band) {
case IEEE80211_BAND_2GHZ:
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
chan_mod = le32_to_cpu(
priv->contexts[IWL_RXON_CTX_BSS].active.flags &
RXON_FLG_CHANNEL_MODE_MSK)
>> RXON_FLG_CHANNEL_MODE_POS;
if (chan_mod == CHANNEL_MODE_PURE_40) {
rate = IWL_RATE_6M_PLCP;
} else {
rate = IWL_RATE_1M_PLCP;
rate_flags = RATE_MCS_CCK_MSK;
}
/*
* Internal scans are passive, so we can indiscriminately set
* the BT ignore flag on 2.4 GHz since it applies to TX only.
*/
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist)
scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
break;
case IEEE80211_BAND_5GHZ:
rate = IWL_RATE_6M_PLCP;
break;
default:
IWL_WARN(priv, "Invalid scan band\n");
return -EIO;
}
/*
* If active scanning is requested but a certain channel is
* marked passive, we can do active scanning if we detect
* transmissions.
*
* There is an issue with some firmware versions that triggers
* a sysassert on a "good CRC threshold" of zero (== disabled),
* on a radar channel even though this means that we should NOT
* send probes.
*
* The "good CRC threshold" is the number of frames that we
* need to receive during our dwell time on a channel before
* sending out probes -- setting this to a huge value will
* mean we never reach it, but at the same time work around
* the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
* here instead of IWL_GOOD_CRC_TH_DISABLED.
*
* This was fixed in later versions along with some other
* scan changes, and the threshold behaves as a flag in those
* versions.
*/
if (priv->new_scan_threshold_behaviour)
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
IWL_GOOD_CRC_TH_DISABLED;
else
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
IWL_GOOD_CRC_TH_NEVER;
band = priv->scan_band;
if (priv->cfg->scan_rx_antennas[band])
rx_ant = priv->cfg->scan_rx_antennas[band];
if (band == IEEE80211_BAND_2GHZ &&
priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist) {
/* transmit 2.4 GHz probes only on first antenna */
scan_tx_antennas = first_antenna(scan_tx_antennas);
}
priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv,
priv->scan_tx_ant[band],
scan_tx_antennas);
rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
/* In power save mode use one chain, otherwise use all chains */
if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
/* rx_ant has been set to all valid chains previously */
active_chains = rx_ant &
((u8)(priv->chain_noise_data.active_chains));
if (!active_chains)
active_chains = rx_ant;
IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
priv->chain_noise_data.active_chains);
rx_ant = first_antenna(active_chains);
}
if (priv->cfg->bt_params &&
priv->cfg->bt_params->advanced_bt_coexist &&
priv->bt_full_concurrent) {
/* operated as 1x1 in full concurrency mode */
rx_ant = first_antenna(rx_ant);
}
/* MIMO is not used here, but value is required */
rx_chain |=
hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
scan->rx_chain = cpu_to_le16(rx_chain);
switch (priv->scan_type) {
case IWL_SCAN_NORMAL:
cmd_len = iwl_fill_probe_req(priv,
(struct ieee80211_mgmt *)scan->data,
vif->addr,
priv->scan_request->ie,
priv->scan_request->ie_len,
IWL_MAX_SCAN_SIZE - sizeof(*scan));
break;
case IWL_SCAN_RADIO_RESET:
case IWL_SCAN_ROC:
/* use bcast addr, will not be transmitted but must be valid */
cmd_len = iwl_fill_probe_req(priv,
(struct ieee80211_mgmt *)scan->data,
iwl_bcast_addr, NULL, 0,
IWL_MAX_SCAN_SIZE - sizeof(*scan));
break;
default:
BUG();
}
scan->tx_cmd.len = cpu_to_le16(cmd_len);
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
RXON_FILTER_BCON_AWARE_MSK);
switch (priv->scan_type) {
case IWL_SCAN_RADIO_RESET:
scan->channel_count =
iwl_get_single_channel_for_scan(priv, vif, band,
(void *)&scan->data[cmd_len]);
break;
case IWL_SCAN_NORMAL:
scan->channel_count =
iwl_get_channels_for_scan(priv, vif, band,
is_active, n_probes,
(void *)&scan->data[cmd_len]);
break;
case IWL_SCAN_ROC: {
struct iwl_scan_channel *scan_ch;
scan->channel_count = 1;
scan_ch = (void *)&scan->data[cmd_len];
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
scan_ch->channel =
cpu_to_le16(priv->hw_roc_channel->hw_value);
scan_ch->active_dwell =
scan_ch->passive_dwell =
cpu_to_le16(priv->hw_roc_duration);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
}
break;
}
if (scan->channel_count == 0) {
IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
return -EIO;
}
cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct iwl_scan_channel);
cmd.data[0] = scan;
cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
scan->len = cpu_to_le16(cmd.len[0]);
/* set scan bit here for PAN params */
set_bit(STATUS_SCAN_HW, &priv->shrd->status);
ret = iwlagn_set_pan_params(priv);
if (ret)
return ret;
ret = iwl_trans_send_cmd(trans(priv), &cmd);
if (ret) {
clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
iwlagn_set_pan_params(priv);
}
return ret;
}
void iwl_init_scan_params(struct iwl_priv *priv)
{
u8 ant_idx = fls(hw_params(priv).valid_tx_ant) - 1;
......
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