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path: root/drivers/net/wireless/iwlwifi/iwl-scan.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-scan.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-scan.c126
1 files changed, 95 insertions, 31 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index 902efe4bc898..031d8e21f82f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -32,7 +32,6 @@
#include "iwl-eeprom.h"
#include "iwl-dev.h"
-#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-agn.h"
#include "iwl-trans.h"
@@ -53,6 +52,7 @@
#define IWL_PASSIVE_DWELL_TIME_52 (10)
#define IWL_PASSIVE_DWELL_BASE (100)
#define IWL_CHANNEL_TUNE_TIME 5
+#define MAX_SCAN_CHANNEL 50
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
@@ -69,7 +69,7 @@ static int iwl_send_scan_abort(struct iwl_priv *priv)
if (!test_bit(STATUS_READY, &priv->status) ||
!test_bit(STATUS_GEO_CONFIGURED, &priv->status) ||
!test_bit(STATUS_SCAN_HW, &priv->status) ||
- test_bit(STATUS_FW_ERROR, &priv->shrd->status))
+ test_bit(STATUS_FW_ERROR, &priv->status))
return -EIO;
ret = iwl_dvm_send_cmd(priv, &cmd);
@@ -451,6 +451,46 @@ static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
return iwl_limit_dwell(priv, passive);
}
+/* Return valid, unused, channel for a passive scan to reset the RF */
+static u8 iwl_get_single_channel_number(struct iwl_priv *priv,
+ enum ieee80211_band band)
+{
+ const struct iwl_channel_info *ch_info;
+ int i;
+ u8 channel = 0;
+ u8 min, max;
+ struct iwl_rxon_context *ctx;
+
+ if (band == IEEE80211_BAND_5GHZ) {
+ min = 14;
+ max = priv->channel_count;
+ } else {
+ min = 0;
+ max = 14;
+ }
+
+ for (i = min; i < max; i++) {
+ bool busy = false;
+
+ for_each_context(priv, ctx) {
+ busy = priv->channel_info[i].channel ==
+ le16_to_cpu(ctx->staging.channel);
+ if (busy)
+ break;
+ }
+
+ if (busy)
+ continue;
+
+ channel = priv->channel_info[i].channel;
+ ch_info = iwl_get_channel_info(priv, band, channel);
+ if (is_channel_valid(ch_info))
+ break;
+ }
+
+ return channel;
+}
+
static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
struct ieee80211_vif *vif,
enum ieee80211_band band,
@@ -577,7 +617,8 @@ static int iwl_get_channels_for_scan(struct iwl_priv *priv,
*/
static u16 iwl_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
- const u8 *ies, int ie_len, int left)
+ const u8 *ies, int ie_len, const u8 *ssid,
+ u8 ssid_len, int left)
{
int len = 0;
u8 *pos = NULL;
@@ -599,14 +640,18 @@ static u16 iwl_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
/* ...next IE... */
pos = &frame->u.probe_req.variable[0];
- /* fill in our indirect SSID IE */
- left -= 2;
+ /* fill in our SSID IE */
+ left -= ssid_len + 2;
if (left < 0)
return 0;
*pos++ = WLAN_EID_SSID;
- *pos++ = 0;
+ *pos++ = ssid_len;
+ if (ssid && ssid_len) {
+ memcpy(pos, ssid, ssid_len);
+ pos += ssid_len;
+ }
- len += 2;
+ len += ssid_len + 2;
if (WARN_ON(left < ie_len))
return len;
@@ -633,13 +678,22 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
u16 rx_chain = 0;
enum ieee80211_band band;
u8 n_probes = 0;
- u8 rx_ant = hw_params(priv).valid_rx_ant;
+ u8 rx_ant = priv->hw_params.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;
+ u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
int ret;
+ int scan_cmd_size = sizeof(struct iwl_scan_cmd) +
+ MAX_SCAN_CHANNEL * sizeof(struct iwl_scan_channel) +
+ priv->fw->ucode_capa.max_probe_length;
+ const u8 *ssid = NULL;
+ u8 ssid_len = 0;
+
+ if (WARN_ON_ONCE(priv->scan_request &&
+ priv->scan_request->n_channels > MAX_SCAN_CHANNEL))
+ return -EINVAL;
lockdep_assert_held(&priv->mutex);
@@ -647,8 +701,7 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *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);
+ priv->scan_cmd = kmalloc(scan_cmd_size, GFP_KERNEL);
if (!priv->scan_cmd) {
IWL_DEBUG_SCAN(priv,
"fail to allocate memory for scan\n");
@@ -656,7 +709,7 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
}
}
scan = priv->scan_cmd;
- memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
+ memset(scan, 0, scan_cmd_size);
scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
@@ -707,10 +760,18 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
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;
+ /*
+ * The highest priority SSID is inserted to the
+ * probe request template.
+ */
+ ssid_len = priv->scan_request->ssids[0].ssid_len;
+ ssid = priv->scan_request->ssids[0].ssid;
+
+ /*
+ * Invert the order of ssids, the firmware will invert
+ * it back.
+ */
+ for (i = priv->scan_request->n_ssids - 1; i >= 1; i--) {
scan->direct_scan[p].id = WLAN_EID_SSID;
scan->direct_scan[p].len =
priv->scan_request->ssids[i].ssid_len;
@@ -751,8 +812,8 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
* Internal scans are passive, so we can indiscriminately set
* the BT ignore flag on 2.4 GHz since it applies to TX only.
*/
- if (cfg(priv)->bt_params &&
- cfg(priv)->bt_params->advanced_bt_coexist)
+ 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:
@@ -793,12 +854,9 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
band = priv->scan_band;
- if (cfg(priv)->scan_rx_antennas[band])
- rx_ant = cfg(priv)->scan_rx_antennas[band];
-
if (band == IEEE80211_BAND_2GHZ &&
- cfg(priv)->bt_params &&
- cfg(priv)->bt_params->advanced_bt_coexist) {
+ 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);
}
@@ -809,8 +867,12 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
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)) {
+ /*
+ * In power save mode while associated use one chain,
+ * otherwise use all chains
+ */
+ if (test_bit(STATUS_POWER_PMI, &priv->status) &&
+ !(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
/* rx_ant has been set to all valid chains previously */
active_chains = rx_ant &
((u8)(priv->chain_noise_data.active_chains));
@@ -822,8 +884,8 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
rx_ant = first_antenna(active_chains);
}
- if (cfg(priv)->bt_params &&
- cfg(priv)->bt_params->advanced_bt_coexist &&
+ 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);
@@ -831,7 +893,7 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
/* MIMO is not used here, but value is required */
rx_chain |=
- hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
+ priv->hw_params.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;
@@ -843,7 +905,8 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
vif->addr,
priv->scan_request->ie,
priv->scan_request->ie_len,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ ssid, ssid_len,
+ scan_cmd_size - sizeof(*scan));
break;
case IWL_SCAN_RADIO_RESET:
case IWL_SCAN_ROC:
@@ -851,7 +914,8 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
cmd_len = iwl_fill_probe_req(
(struct ieee80211_mgmt *)scan->data,
iwl_bcast_addr, NULL, 0,
- IWL_MAX_SCAN_SIZE - sizeof(*scan));
+ NULL, 0,
+ scan_cmd_size - sizeof(*scan));
break;
default:
BUG();
@@ -944,7 +1008,7 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
void iwl_init_scan_params(struct iwl_priv *priv)
{
- u8 ant_idx = fls(hw_params(priv).valid_tx_ant) - 1;
+ u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1;
if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ])
priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ])
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.