aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-scan.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-scan.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-scan.c214
1 files changed, 54 insertions, 160 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 6330b91e37c..e26875dbe85 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -445,13 +445,6 @@ int iwl_mac_hw_scan(struct ieee80211_hw *hw,
unsigned long flags;
struct iwl_priv *priv = hw->priv;
int ret;
- u8 *ssid = NULL;
- size_t ssid_len = 0;
-
- if (req->n_ssids) {
- ssid = req->ssids[0].ssid;
- ssid_len = req->ssids[0].ssid_len;
- }
IWL_DEBUG_MAC80211(priv, "enter\n");
@@ -485,13 +478,7 @@ int iwl_mac_hw_scan(struct ieee80211_hw *hw,
goto out_unlock;
}
- if (ssid_len) {
- priv->one_direct_scan = 1;
- priv->direct_ssid_len = ssid_len;
- memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
- } else {
- priv->one_direct_scan = 0;
- }
+ priv->scan_request = req;
ret = iwl_scan_initiate(priv);
@@ -530,73 +517,14 @@ void iwl_bg_scan_check(struct work_struct *data)
EXPORT_SYMBOL(iwl_bg_scan_check);
/**
- * iwl_supported_rate_to_ie - fill in the supported rate in IE field
- *
- * return : set the bit for each supported rate insert in ie
- */
-static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
- u16 basic_rate, int *left)
-{
- u16 ret_rates = 0, bit;
- int i;
- u8 *cnt = ie;
- u8 *rates = ie + 1;
-
- for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
- if (bit & supported_rate) {
- ret_rates |= bit;
- rates[*cnt] = iwl_rates[i].ieee |
- ((bit & basic_rate) ? 0x80 : 0x00);
- (*cnt)++;
- (*left)--;
- if ((*left <= 0) ||
- (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
- break;
- }
- }
-
- return ret_rates;
-}
-
-
-static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
- u8 *pos, int *left)
-{
- struct ieee80211_ht_cap *ht_cap;
-
- if (!sband || !sband->ht_cap.ht_supported)
- return;
-
- if (*left < sizeof(struct ieee80211_ht_cap))
- return;
-
- *pos++ = sizeof(struct ieee80211_ht_cap);
- ht_cap = (struct ieee80211_ht_cap *) pos;
-
- ht_cap->cap_info = cpu_to_le16(sband->ht_cap.cap);
- memcpy(&ht_cap->mcs, &sband->ht_cap.mcs, 16);
- ht_cap->ampdu_params_info =
- (sband->ht_cap.ampdu_factor & IEEE80211_HT_AMPDU_PARM_FACTOR) |
- ((sband->ht_cap.ampdu_density << 2) &
- IEEE80211_HT_AMPDU_PARM_DENSITY);
- *left -= sizeof(struct ieee80211_ht_cap);
-}
-
-/**
* iwl_fill_probe_req - fill in all required fields and IE for probe request
*/
-u16 iwl_fill_probe_req(struct iwl_priv *priv,
- enum ieee80211_band band,
- struct ieee80211_mgmt *frame,
- int left)
+u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame,
+ const u8 *ies, int ie_len, int left)
{
int len = 0;
u8 *pos = NULL;
- u16 active_rates, ret_rates, cck_rates, active_rate_basic;
- const struct ieee80211_supported_band *sband =
- iwl_get_hw_mode(priv, band);
-
/* Make sure there is enough space for the probe request,
* two mandatory IEs and the data */
@@ -624,62 +552,12 @@ u16 iwl_fill_probe_req(struct iwl_priv *priv,
len += 2;
- /* fill in supported rate */
- left -= 2;
- if (left < 0)
- return 0;
-
- *pos++ = WLAN_EID_SUPP_RATES;
- *pos = 0;
-
- /* exclude 60M rate */
- active_rates = priv->rates_mask;
- active_rates &= ~IWL_RATE_60M_MASK;
-
- active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
-
- cck_rates = IWL_CCK_RATES_MASK & active_rates;
- ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
- active_rate_basic, &left);
- active_rates &= ~ret_rates;
-
- ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
- active_rate_basic, &left);
- active_rates &= ~ret_rates;
-
- len += 2 + *pos;
- pos += (*pos) + 1;
+ if (WARN_ON(left < ie_len))
+ return len;
- if (active_rates == 0)
- goto fill_end;
-
- /* fill in supported extended rate */
- /* ...next IE... */
- left -= 2;
- if (left < 0)
- return 0;
- /* ... fill it in... */
- *pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos = 0;
- iwl_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left);
- if (*pos > 0) {
- len += 2 + *pos;
- pos += (*pos) + 1;
- } else {
- pos--;
- }
-
- fill_end:
-
- left -= 2;
- if (left < 0)
- return 0;
-
- *pos++ = WLAN_EID_HT_CAPABILITY;
- *pos = 0;
- iwl_ht_cap_to_ie(sband, pos, &left);
- if (*pos > 0)
- len += 2 + *pos;
+ memcpy(pos, ies, ie_len);
+ len += ie_len;
+ left -= ie_len;
return (u16)len;
}
@@ -699,11 +577,13 @@ static void iwl_bg_request_scan(struct work_struct *data)
int ret = 0;
u32 rate_flags = 0;
u16 cmd_len;
+ u16 rx_chain = 0;
enum ieee80211_band band;
- u8 n_probes = 2;
- u8 rx_chain = priv->hw_params.valid_rx_ant;
+ u8 n_probes = 0;
+ u8 rx_ant = priv->hw_params.valid_rx_ant;
u8 rate;
- DECLARE_SSID_BUF(ssid);
+ bool is_active = false;
+ int chan_mod;
conf = ieee80211_get_hw_conf(priv->hw);
@@ -795,19 +675,25 @@ static void iwl_bg_request_scan(struct work_struct *data)
scan_suspend_time, interval);
}
- /* We should add the ability for user to lock to PASSIVE ONLY */
- if (priv->one_direct_scan) {
- IWL_DEBUG_SCAN(priv, "Start direct scan for '%s'\n",
- print_ssid(ssid, priv->direct_ssid,
- priv->direct_ssid_len));
- scan->direct_scan[0].id = WLAN_EID_SSID;
- scan->direct_scan[0].len = priv->direct_ssid_len;
- memcpy(scan->direct_scan[0].ssid,
- priv->direct_ssid, priv->direct_ssid_len);
- n_probes++;
- } else {
- IWL_DEBUG_SCAN(priv, "Start indirect scan.\n");
- }
+ 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");
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
@@ -817,7 +703,9 @@ static void iwl_bg_request_scan(struct work_struct *data)
if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
band = IEEE80211_BAND_2GHZ;
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
- if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) {
+ chan_mod = le32_to_cpu(priv->active_rxon.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;
@@ -827,13 +715,18 @@ static void iwl_bg_request_scan(struct work_struct *data)
} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
band = IEEE80211_BAND_5GHZ;
rate = IWL_RATE_6M_PLCP;
- scan->good_CRC_th = IWL_GOOD_CRC_TH;
+ /*
+ * If active scaning is requested but a certain channel
+ * is marked passive, we can do active scanning if we
+ * detect transmissions.
+ */
+ scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
/* Force use of chains B and C (0x6) for scan Rx for 4965
* Avoid A (0x1) because of its off-channel reception on A-band.
*/
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
- rx_chain = 0x6;
+ rx_ant = ANT_BC;
} else {
IWL_WARN(priv, "Invalid scan band count\n");
goto done;
@@ -845,26 +738,27 @@ static void iwl_bg_request_scan(struct work_struct *data)
scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
/* MIMO is not used here, but value is required */
- scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
- cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
- (rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) |
- (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
-
- cmd_len = iwl_fill_probe_req(priv, band,
- (struct ieee80211_mgmt *)scan->data,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ rx_chain |= ANT_ABC << RXON_RX_CHAIN_VALID_POS;
+ rx_chain |= ANT_ABC << 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);
+ cmd_len = iwl_fill_probe_req(priv,
+ (struct ieee80211_mgmt *)scan->data,
+ priv->scan_request->ie,
+ priv->scan_request->ie_len,
+ IWL_MAX_SCAN_SIZE - sizeof(*scan));
scan->tx_cmd.len = cpu_to_le16(cmd_len);
- if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
+ if (iwl_is_monitor_mode(priv))
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
RXON_FILTER_BCON_AWARE_MSK);
scan->channel_count =
- iwl_get_channels_for_scan(priv, band, 1, /* active */
- n_probes,
+ iwl_get_channels_for_scan(priv, band, is_active, n_probes,
(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
if (scan->channel_count == 0) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 22:00:30 +0000