/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
* sending probe req. This should be set long enough to hear probe responses
* from more than one AP. */
-#define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
-#define IWL_ACTIVE_DWELL_TIME_52 (10)
+#define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
+#define IWL_ACTIVE_DWELL_TIME_52 (20)
+
+#define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
+#define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
/* For faster active scanning, scan will move to the next channel if fewer than
* PLCP_QUIET_THRESH packets are heard on this channel within
* no other traffic).
* Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
#define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
-#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
+#define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(10) /* msec */
/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
* Must be set longer than active dwell time.
#define IWL_PASSIVE_DWELL_BASE (100)
#define IWL_CHANNEL_TUNE_TIME 5
+#define IWL_SCAN_PROBE_MASK(n) cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
+
+
+static int scan_tx_ant[3] = {
+ RATE_MCS_ANT_A_MSK, RATE_MCS_ANT_B_MSK, RATE_MCS_ANT_C_MSK
+};
+
static int iwl_is_empty_essid(const char *essid, int essid_len)
clear_bit(STATUS_SCAN_HW, &priv->status);
}
+ priv->alloc_rxb_skb--;
dev_kfree_skb_any(cmd.meta.u.skb);
return ret;
"(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
notif->channel,
notif->band ? "bg" : "a",
- notif->tsf_high,
- notif->tsf_low, notif->status, notif->beacon_timer);
+ le32_to_cpu(notif->tsf_high),
+ le32_to_cpu(notif->tsf_low),
+ notif->status, notif->beacon_timer);
}
/* Service SCAN_RESULTS_NOTIFICATION (0x83) */
static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
+#ifdef CONFIG_IWLWIFI_DEBUG
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
scan_notif->scanned_channels,
scan_notif->tsf_low,
scan_notif->tsf_high, scan_notif->status);
+#endif
/* The HW is no longer scanning */
clear_bit(STATUS_SCAN_HW, &priv->status);
cancel_delayed_work(&priv->scan_check);
IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
- (priv->scan_bands == 2) ? "2.4" : "5.2",
+ (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
+ "2.4" : "5.2",
jiffies_to_msecs(elapsed_jiffies
(priv->scan_pass_start, jiffies)));
- /* Remove this scanned band from the list
- * of pending bands to scan */
- priv->scan_bands--;
+ /* Remove this scanned band from the list of pending
+ * bands to scan, band G precedes A in order of scanning
+ * as seen in iwl_bg_request_scan */
+ if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
+ priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
+ else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ))
+ priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
/* If a request to abort was given, or the scan did not succeed
* then we reset the scan state machine and terminate,
clear_bit(STATUS_SCAN_ABORTING, &priv->status);
} else {
/* If there are more bands on this scan pass reschedule */
- if (priv->scan_bands > 0)
+ if (priv->scan_bands)
goto reschedule;
}
EXPORT_SYMBOL(iwl_setup_rx_scan_handlers);
static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band)
+ enum ieee80211_band band,
+ u8 n_probes)
{
if (band == IEEE80211_BAND_5GHZ)
- return IWL_ACTIVE_DWELL_TIME_52;
+ return IWL_ACTIVE_DWELL_TIME_52 +
+ IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
else
- return IWL_ACTIVE_DWELL_TIME_24;
+ return IWL_ACTIVE_DWELL_TIME_24 +
+ IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
}
static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv,
- enum ieee80211_band band)
+ enum ieee80211_band band)
{
- u16 active = iwl_get_active_dwell_time(priv, band);
- u16 passive = (band != IEEE80211_BAND_5GHZ) ?
+ u16 passive = (band == IEEE80211_BAND_2GHZ) ?
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
}
- if (passive <= active)
- passive = active + 1;
-
return passive;
}
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
enum ieee80211_band band,
- u8 is_active, u8 direct_mask,
+ u8 is_active, u8 n_probes,
struct iwl_scan_channel *scan_ch)
{
const struct ieee80211_channel *channels = NULL;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
+ u16 channel;
sband = iwl_get_hw_mode(priv, band);
if (!sband)
channels = sband->channels;
- active_dwell = iwl_get_active_dwell_time(priv, band);
+ 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 < sband->n_channels; i++) {
if (channels[i].flags & IEEE80211_CHAN_DISABLED)
continue;
- scan_ch->channel =
+ channel =
ieee80211_frequency_to_channel(channels[i].center_freq);
+ scan_ch->channel = cpu_to_le16(channel);
- ch_info = iwl_get_channel_info(priv, band,
- scan_ch->channel);
+ ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info)) {
- IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
- scan_ch->channel);
+ IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
+ channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
(channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
- scan_ch->type = 0; /* passive */
+ scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
- scan_ch->type = 1; /* active */
+ scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
- if (scan_ch->type & 1)
- scan_ch->type |= (direct_mask << 1);
+ if ((scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) && 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->tpc.dsp_atten = 110;
- /* scan_pwr_info->tpc.dsp_atten; */
+ scan_ch->dsp_atten = 110;
- /*scan_pwr_info->tpc.tx_gain; */
+ /* 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->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
- else {
- scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
- /* NOTE: if we were doing 6Mb OFDM for scans we'd use
- * power level:
- * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
- */
- }
+ scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+ else
+ scan_ch->tx_gain = ((1 << 5) | (5 << 3));
- IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
- scan_ch->channel,
- (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
- (scan_ch->type & 1) ?
+ IWL_DEBUG_SCAN("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++;
return added;
}
+void iwl_init_scan_params(struct iwl_priv *priv)
+{
+ if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ])
+ priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = RATE_MCS_ANT_INIT_IND;
+ if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ])
+ priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = RATE_MCS_ANT_INIT_IND;
+}
+
int iwl_scan_initiate(struct iwl_priv *priv)
{
if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
}
IWL_DEBUG_INFO("Starting scan...\n");
- priv->scan_bands = 2;
+ if (priv->cfg->sku & IWL_SKU_G)
+ priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
+ if (priv->cfg->sku & IWL_SKU_A)
+ priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
set_bit(STATUS_SCANNING, &priv->status);
priv->scan_start = jiffies;
priv->scan_pass_start = priv->scan_start;
static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
- u8 *pos, int *left)
+ u8 *pos, int *left)
{
struct ieee80211_ht_cap *ht_cap;
/**
* iwl_fill_probe_req - fill in all required fields and IE for probe request
*/
+
static u16 iwl_fill_probe_req(struct iwl_priv *priv,
enum ieee80211_band band,
struct ieee80211_mgmt *frame,
- int left, int is_direct)
+ int left)
{
int len = 0;
u8 *pos = NULL;
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 */
left -= 24;
if (left < 0)
return 0;
- len += 24;
frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
frame->seq_ctrl = 0;
- /* fill in our indirect SSID IE */
+ len += 24;
+
/* ...next IE... */
+ pos = &frame->u.probe_req.variable[0];
+ /* fill in our indirect SSID IE */
left -= 2;
if (left < 0)
return 0;
- len += 2;
- pos = &(frame->u.probe_req.variable[0]);
*pos++ = WLAN_EID_SSID;
*pos++ = 0;
- /* fill in our direct SSID IE... */
- if (is_direct) {
- /* ...next IE... */
- left -= 2 + priv->essid_len;
- if (left < 0)
- return 0;
- /* ... fill it in... */
- *pos++ = WLAN_EID_SSID;
- *pos++ = priv->essid_len;
- memcpy(pos, priv->essid, priv->essid_len);
- pos += priv->essid_len;
- len += 2 + priv->essid_len;
- }
+ len += 2;
/* fill in supported rate */
- /* ...next IE... */
left -= 2;
if (left < 0)
return 0;
- /* ... fill it in... */
*pos++ = WLAN_EID_SUPP_RATES;
*pos = 0;
cck_rates = IWL_CCK_RATES_MASK & active_rates;
ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
- active_rate_basic, &left);
+ active_rate_basic, &left);
active_rates &= ~ret_rates;
ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
- active_rate_basic, &left);
+ active_rate_basic, &left);
active_rates &= ~ret_rates;
len += 2 + *pos;
pos += (*pos) + 1;
+
if (active_rates == 0)
goto fill_end;
/* ... 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)
+ 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:
- /* fill in HT IE */
+
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;
+
return (u16)len;
}
+static u32 iwl_scan_tx_ant(struct iwl_priv *priv, enum ieee80211_band band)
+{
+ int i, ind;
+
+ ind = priv->scan_tx_ant[band];
+ for (i = 0; i < priv->hw_params.tx_chains_num; i++) {
+ ind = (ind+1) >= priv->hw_params.tx_chains_num ? 0 : ind+1;
+ if (priv->hw_params.valid_tx_ant & (1 << ind)) {
+ priv->scan_tx_ant[band] = ind;
+ break;
+ }
+ }
+ IWL_DEBUG_SCAN("select TX ANT = %c\n", 'A' + ind);
+ return scan_tx_ant[ind];
+}
+
+
static void iwl_bg_request_scan(struct work_struct *data)
{
struct iwl_priv *priv =
};
struct iwl_scan_cmd *scan;
struct ieee80211_conf *conf = NULL;
+ int ret = 0;
+ u32 tx_ant;
u16 cmd_len;
enum ieee80211_band band;
- u8 direct_mask;
- int ret = 0;
+ u8 n_probes = 2;
+ u8 rx_chain = 0x7; /* bitmap: ABC chains */
conf = ieee80211_get_hw_conf(priv->hw);
/* We should add the ability for user to lock to PASSIVE ONLY */
if (priv->one_direct_scan) {
- IWL_DEBUG_SCAN
- ("Kicking off one direct scan for '%s'\n",
- iwl_escape_essid(priv->direct_ssid,
- priv->direct_ssid_len));
+ IWL_DEBUG_SCAN("Start direct scan for '%s'\n",
+ iwl_escape_essid(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);
- direct_mask = 1;
+ n_probes++;
} else if (!iwl_is_associated(priv) && priv->essid_len) {
- IWL_DEBUG_SCAN
- ("Kicking off one direct scan for '%s' when not associated\n",
- iwl_escape_essid(priv->essid, priv->essid_len));
+ IWL_DEBUG_SCAN("Start direct scan for '%s' (not associated)\n",
+ iwl_escape_essid(priv->essid, priv->essid_len));
scan->direct_scan[0].id = WLAN_EID_SSID;
scan->direct_scan[0].len = priv->essid_len;
memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
- direct_mask = 1;
+ n_probes++;
} else {
- IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
- direct_mask = 0;
+ IWL_DEBUG_SCAN("Start indirect scan.\n");
}
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
- switch (priv->scan_bands) {
- case 2:
+ if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
+ band = IEEE80211_BAND_2GHZ;
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
- scan->tx_cmd.rate_n_flags =
- iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
- RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
-
+ tx_ant = iwl_scan_tx_ant(priv, band);
+ if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK)
+ scan->tx_cmd.rate_n_flags =
+ iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
+ tx_ant);
+ else
+ scan->tx_cmd.rate_n_flags =
+ iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
+ tx_ant |
+ RATE_MCS_CCK_MSK);
scan->good_CRC_th = 0;
- band = IEEE80211_BAND_2GHZ;
- break;
-
- case 1:
+ } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
+ band = IEEE80211_BAND_5GHZ;
+ tx_ant = iwl_scan_tx_ant(priv, band);
scan->tx_cmd.rate_n_flags =
- iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
- RATE_MCS_ANT_B_MSK);
+ iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
+ tx_ant);
scan->good_CRC_th = IWL_GOOD_CRC_TH;
- band = IEEE80211_BAND_5GHZ;
- break;
- default:
+ /* 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.
+ * MIMO is not used here, but value is required */
+ if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
+ rx_chain = 0x6;
+ } else {
IWL_WARNING("Invalid scan band count\n");
goto done;
}
- /* We don't build a direct scan probe request; the uCode will do
- * that based on the direct_mask added to each channel entry */
+ 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), 0);
+ (struct ieee80211_mgmt *)scan->data,
+ IWL_MAX_SCAN_SIZE - sizeof(*scan));
scan->tx_cmd.len = cpu_to_le16(cmd_len);
- /* select Rx chains */
-
- /* Force use of chains B and C (0x6) for scan Rx.
- * Avoid A (0x1) because of its off-channel reception on A-band.
- * MIMO is not used here, but value is required to make uCode happy. */
- scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
- cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
- (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
- (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
scan->filter_flags = RXON_FILTER_PROMISC_MSK;
- if (direct_mask)
- scan->channel_count =
- iwl_get_channels_for_scan(
- priv, band, 1, /* active */
- direct_mask,
- (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
- else
- scan->channel_count =
- iwl_get_channels_for_scan(
- priv, band, 0, /* passive */
- direct_mask,
- (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
-
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,
+ (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
+
+ if (scan->channel_count == 0) {
+ IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
+ goto done;
+ }
+
cmd.len += le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct iwl_scan_channel);
cmd.data = scan;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff